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I=E2=80=99ve determined this much:-
After, say, 5 miles the car started slipping in/out of OD. It was a =
slower in/out than one would obtain with the dashboard switch. Sort of =
slipping in/out. Not =E2=80=9Cdropping out=E2=80=9D so far as I can =
determine.
=20
Per Michael=E2=80=99s advice, I removed the operating valve and charged =
up/down hills and along a Motorway. No slippage. At all. I concluded =
that the clutch on the flywheel was not slipping. (TG, as it=E2=80=99s =
practically brand new).
=20
I then replaced the all the valve components under a gauge, jacked the =
car up/wheels off the ground and spun up the engine..into gear and =
switched on the OD. A steady 500psi which remained steady with the =
engine off until I engaged/disengaged the OD a few times. Which, from =
memory, is what one would expect. At this stage I cleaned out the rod. =
No dirt detected in little hole but could easily miss a flake of paint =
or a piece of swarf=E2=80=A6=E2=80=A6
=20
The solenoid makes a healthy click and visibly lifts the lever, say, =
=C2=BC=E2=80=9D. Appears(!) healthy. OD seems to go in and out as it =
should and not slip but wheels are off the ground so not a fair test for =
slippage.=20
=20
The whole OD was rebuilt, by OD spares about 15 years ago since when =
it=E2=80=99s had a fairly relaxed time and about 15,000 miles. Very =
seldom more than 80mph and usually cruising at 65mph on Motorway. The =
front, pump end, was rebuilt by ODSpares in late 2021. Car has a 28% OD =
and a 3:54 diff so 65mph is fairly relaxed rev wise.
=20
Have not delved into Throttle Switch, Relay or Solenoid yet. Will do so, =
in that order, when weather permits test drives.
=20
Thank you everyone for your help and attention in this matter,
Simon
=20
From: Healeys <healeys-bounces@autox.team.net> On Behalf Of Bob Spidell
Sent: Friday, April 26, 2024 7:17 PM
To: gradea1@charter.net; healeys@autox.team.net
Subject: Re: [Healeys] Overdrive pressure or clutch slip Step 2!
=20
I lost the plot (not unusual): Have we determined, for sure, that the =
problem is 'slippage,' which would most likely be due to wear in the O/D =
cone clutch? Or have we determined that Simon's O/D is 'dropping out' =
which, to my thinking, would be caused by the 8 strong springs =
overcoming hydraulic pressure (and causing the brake ring to slip or =
disengage, no?).=20
On 4/26/2024 10:03 AM, Hank Leach wrote:
Ok the pressure gauge implies that the hydraulic system is in good =
condition and that will effectively produce overdrive when the cone =
clutch is pushed forward in the box. When OD is not required the =
solenoid is inactive and the 8 springs in the unit have to keep the cone =
clutch in the rearward or in direct drive position.
These are stout springs and normally are strong enough to engage and =
hold the clutch without slipping, overcoming the hydraulic =
influence-which should be draining at this point..However if the springs =
are misinstalled in the wrong position or not properly mounted on their =
tabs upon assembly or previously "coil bound" from that procedure or =
wear, they will not function to keep direct drive solid without =
slipping.
The clutch material should outlive all of us and is not normally, or =
easily, replaced. All you have to keep the car in direct drive are those =
8 springs and their pressure.
-Hate to say it but if the re-assembly was defective, the gearbox needs =
to come out and OD removed and checked for correct spring fit-at that =
time I would replace the 8 springs (about $100 from Moss) as a routine =
repair. (photos from my article in AH Mag) Hank
<bspidell@comcast.net>=20
Sent: April 26, 2024 at 9:37 AM PDT=20
Subject: Re: [Healeys] Overdrive pressure or clutch slip Step 2!=20
Spitballing ...
I went through my BJ8's O/D a few years ago. The car had 64K miles on it =
when I bought it (approx. 1984), and about 215K* miles on it when I did =
the overhaul. The O/D cone clutch was serviceable--and AFAIK didn't =
slip--and I reinstalled it. If new cone clutches were readily available =
I might have bought new, on principle, depending on cost, but all I =
could find was a re-manned one from DWM. To me this implied they didn't =
often need replacement, whereas known wear items like the accumulator =
are offered by several vendors (I would have installed one with an =
O-ring if I'd known about it).
All this to say, unless the car has extremely high mileage and/or the =
O/D has been abused somehow I'd be surprised if the clutch is worn 'to =
the bone.' Obviously, slippage in the cone clutch would cause Simon's =
car's symptoms; if so, the problem will get progressively worse (and =
more consistent). I think one way to test an O/D clutch would be to =
really lug the car pulling an uphill grade in 4th-O/D, if the clutch is =
going to slip it would do it then (as would a worn engine clutch). =
There's also a (remote) possibility that, for some reason, O/D pressure =
fluctuates during driving.
* Anyone else have this many or more known miles on a Healey?
bs
On 4/26/2024 4:51 AM, Michael Salter wrote:
"What I can=E2=80=99t do is understand the leap to the OD cone clutch?"
=20
Fair question.
Between the flywheel and the rear wheels there are only 2 places where =
"slippage" can occur these are the clutch and the overdrive's cone =
clutch.=20
The gearbox, other than the cone clutch in the overdrive, is a go/no go =
arrangement, i.e. no "slippage".
The rear wheel splines, believe it or not, can also produce "slippage " =
if they are in really bad condition but I presume that isn't the case =
here.
=20
The test that you just completed resulted in no driveline slippage when =
the overdrive was disabled.=20
You are reporting slippage when the overdrive operating system is =
enabled so it follows that further diagnosis of that is required.
=20
Yes, your next step would be the same test drive, i.e. full engine =
torque on an uphill grade, to confirm that the slippage issue has =
returned now that the overdriveoperating valvehasbe re-installed. =20
I would do this test drive BEFORE making any adjustments to the =
overdrive valve or solenoid in order to confirm that meerly installing =
the overdrive operating valve resulted in the slippage issue returning.=20
Hope the weather improves, beautiful day here.
M
=20
On Fri., Apr. 26, 2024, 7:24 a.m. Simon Lachlan, =
<simon.lachlan@alexarevel.plus.com =
Hi, Thanks for this.
Not sure I understand fully.=20
Once I=E2=80=99d finished the test drive with the OD operating valve out =
of the car, I returned the rod, ball, spring etc and put in the gauge =
rather than the nut. And got 500+ psi.=20
What I can=E2=80=99t do is understand the leap to the OD cone clutch. =
Not arguing=E2=80=A6just saying no comprende. As I sat in the car, I was =
thinking that the function of the OD seems OK and that it=E2=80=99s =
being interfered with by something in its =
circuitry=E2=80=A6=E2=80=A6relay, solenoid or throttle switch. =
That=E2=80=99s probably wishful thinking as I really don=E2=80=99t want =
to be swimming in those waters.
=20
I did, as a matter of course, clean out the tiny hole in the rod but =
didn=E2=80=99t detect any blockage=E2=80=A6.which doesn=E2=80=99t mean =
much as something minute could have been inside and been washed away by =
the detergent/hot water then WD40=E2=80=A6..
=20
After someone=E2=80=99s advice =E2=80=93 some time back =E2=80=93 =
I=E2=80=99ve got another rod whose aperture has been drilled out to =
1.5mm. This was =E2=80=9Cto allow the OD to disengage faster=E2=80=9D. =
Don=E2=80=99t recall if I tried it. Could that rod be any help here?
=20
The ball seems to be sitting square on its seat and the tip of the rod, =
where the ball sits, is not worn or chipped.
Residual pressure=E2=80=A6.. goes to 500+ when I switch OD ON and stays =
there until, engine and switch OFF, I energize the solenoid a few times =
whereupon it drops to zero.
=20
Another test drive(s) seems called for. But the hood is off to enable =
access and the forecast is grim for the next week.
=20
Very open to more suggestions. Thanks,
Simon
=20
=20
=20
=20
=20
From: Michael Salter <michaelsalter@gmail.com =
Sent: Friday, April 26, 2024 12:14 AM
To: Simon Lachlan <simon.lachlan@alexarevel.plus.com =
Subject: Re: Overdrive pressure or clutch slip Step 2!
=20
Okay, then it is confirmed that neither the clutch (on the flywheel) nor =
the overdrive cone clutch (in it's normal drive condition) are producing =
the slippage.=20
>From this we can conclude that even when the overdrive solenoid is not =
energized the slippage is occurring at the overdrive cone clutch and =
that for some reason hydraulic pressure is finding its way into the =
overdrive operating cylinders even when the overdrive operating valve is =
closed.
This can be caused by leakage past operating the valve or residual =
pressure.
The question of residual pressure can be resolved by checking that the =
bleed hole in the bottom of the long overdrive valve push rod is not =
blocked.
Whether or not hydraulic pressure is leaking past the operating valve =
ball can be checked by ensuring that the ball is clearly on its seat =
when the operating valve is not energized.
=20
M
=20
On Thu., Apr. 25, 2024, 3:38 p.m. Simon Lachlan, =
<simon.lachlan@alexarevel.plus.com =
Of course. Isn=E2=80=99t that how I got the 520psi?
=20
From: Michael Salter <michaelsalter@gmail.com =
Sent: Thursday, April 25, 2024 6:19 PM
To: Simon Lachlan <simon.lachlan@alexarevel.plus.com =
Subject: Re: Overdrive pressure or clutch slip Step 2!
=20
Question ... when you got home and did the pressure test I presume that =
was AFTER you had put the valve with the "top hat", ball, spring and =
valve rod cap and washer back into position?
=20
M
=20
=20
=20
On Thu., Apr. 25, 2024, 12:29 p.m. Simon Lachlan, =
<simon.lachlan@alexarevel.plus.com =
So, here is Michael=E2=80=99s =E2=80=9CStep 1=E2=80=9D completed. (See =
his email, below).
1. Removed the operating valve and, just for luck, disconnected the two =
wires into 3rd/4th switch. Took the car for a spin. Up/down =
longish/steepish hills, 10 miles on motorway. Various rpm=E2=80=A6..no =
slippage at all.
2. Had a puncture=E2=80=A6..nail in tyre. Rear RHS. Flat as a pancake at =
once. Nearly onto rim. Nail! I imagine the inner tube is shredded and =
the tyre may be a write-off. (Usually are!). Anyhow, I bore you with =
this as I=E2=80=99m convinced that I=E2=80=99d never have got the wheel =
off without the little scissors jack which I carry to get the car up the =
first few inches until the Healey jack comes into play. Just a =
suggestion=E2=80=A6=E2=80=A6.
3. Got home and jacked car up to test pressure. Steady at 520psi which, =
I recall, is plenty. Stayed at 520 across rev range. Dropped very slowly =
once engine was off and dropped to zero as I engaged/disengaged OD a few =
times. Which is normal I think?
4. Solenoid makes a robust =E2=80=9Cclick=E2=80=9D when it should and =
engages the OD when activated.
So what=E2=80=99s a sensible =E2=80=9CStep 2=E2=80=9D??
I have been urged to check the setting of the Throttle Switch (TS). =
Assuming that the slippage returns (and why wouldn=E2=80=99t it?), =
I=E2=80=99ll short the TS out to see if that fixes it. If it does, =
I=E2=80=99ll check the adjustment.
Suggestions would be more than welcome=E2=80=A6=E2=80=A6I do dread =
having to take that box out again. I=E2=80=99ve got a very adequate ramp =
and a very strong volunteer(?) but, regardless of all that, it=E2=80=99s =
still quite a task. And, like a few of us, I=E2=80=99m not as young as I =
once was. I=E2=80=99ve always enjoyed the lines from the manual which I =
reproduce, below. =EF=BF=BD=EF=BF=BD=EF=BF=BDGently ease=E2=80=9D!?!=20
=20
Thanks, Simon
=20
From: Michael Salter <michaelsalter@gmail.com =
Sent: Monday, April 22, 2024 3:21 PM
To: Simon Lachlan <simon.lachlan@alexarevel.plus.com =
Subject: Re: [Healeys] Overdrive pressure or clutch slip
=20
Correct diagnosis is 1/2 the repair!!
=20
First you need to confirm whether the clutch (on the flywheel) or the =
overdrive is causing the slippage.=20
To do this you ABSOLUTELY MUST disable the overdrive as a badly =
misadjuster overdrive operating valve can produce similar symptoms.=20
To do this I would remove the overdrive operating valve completely. =
(There are other ways but this is absolutely definitive).
Now drive the car up a long hill where you are amle to use full throttle =
at around 3000 RPM (maximum torque) for a few seconds. If it is the =
clutch (on the flywheel) that is causing the slippage these operating =
conditions. Test this a few times to be sure.
If there is no slippage we have confirmed that the overdrive clutch is =
at fault.
=20
Step 1 completed. Please report results. MS.
=20
=20
=20
On Mon., Apr. 22, 2024, 8:08 a.m. Simon Lachlan via Healeys, =
You may recall the very extended overdrive and clutch saga last year. =
Long story short(ish)=E2=80=A6
OD was slipping in and out depending on oil temperature.
Correctly diagnosed pressure. Checked with gauge.
Attempted rebuild=E2=80=A6going only so far as accumulator and related =
seals.
Stymied as could not get pump out. Turned out to have been =
=E2=80=9Cfixed=E2=80=9D at some stage with some form of =
=E2=80=9Cchemical metal=E2=80=9D which was coming loose/apart.
Took it up to OD Spares who fixed it..new housing etcetc
Why not a new clutch I thought? Sensible while you=E2=80=99re in the =
area looking at a 30+ yr old item.
New clutch=E2=80=A6no good. Noisy, wouldn=E2=80=99t =
engage/disengage/play at all.
Gearbox out again.
Refit clutch. Presumed I=E2=80=99d made some beginner=E2=80=99s mistake.
Refit gearbox=E2=80=A6no good. Same
Can=E2=80=99t recall whether I tried again. Lost count and enthusiasm by =
now.
Turned out that the new clutch kit was defective. (Thanks Mirek) =
(Genuine B&B from AHSpares).
New one did work.
Saga over until yesterday.
Same sort of symptoms=E2=80=A6..
All=E2=80=99s well for first 10 or so miles. Then the dreaded =
slippage(?) starts. But it=E2=80=99s not quite the same. Reminds me more =
of a slipping clutch. (But NO smell)
Symptoms continue if it=E2=80=99s in or out of OD.
Symptoms reduce at speed.
Yes, plenty of oil. Over the full mark. Looks very clean. Pretty sure =
it=E2=80=99s 40wt non-detergent topped up with 30wt non-detergent. (Or =
vice-versa). Am confident in state of the filter, magnets etc.
No, I have not pressure tested it yet and yes, I dread restarting the =
whole bloody process all over again. I=E2=80=99m not sure I can face =
taking the box out again once, let alone multiple times.
What I want and experience tells me I=E2=80=99m unlikely to get is a =
miracle cure!
One initial question=E2=80=A6..do OD relays either work or not work? ie, =
can the relay hover between on and off which might lead to the OD coming =
in and out? I think that could happen if the switch is off but the unit =
still hasn=E2=80=99t got the message to disengage from the bulkhead =
switch.
And a supplementary=E2=80=A6.how do I bench test the relay?
Simon
=20
_______________________________________________
=20
Archive: http://www.team.net/pipermail/healeys =
http://autox.team.net/archive/healeys
=20
http://autox.team.net/mailman/listinfo/healeys
=20
http://autox.team.net/mailman/options/healeys/bspidell@comcast.net
=20
=20
=20
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vlink=3Dpurple style=3D'word-wrap:break-word'><div =
class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'>I=E2=80=99ve determined this =
much:-<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'>After, say, 5 miles the car =
started slipping in/out of OD. It was a slower in/out than one would =
obtain with the dashboard switch. Sort of slipping in/out. Not =
=E2=80=9Cdropping out=E2=80=9D so far as I can =
determine.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'>Per Michael=E2=80=99s advice, I =
removed the operating valve and charged up/down hills and along a =
Motorway. No slippage. At all. I concluded that the clutch on the =
flywheel was not slipping. (TG, as it=E2=80=99s practically brand =
new).<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'>I then replaced the all the =
valve components under a gauge, jacked the car up/wheels off the ground =
and spun up the engine..into gear and switched on the OD. A steady =
500psi which remained steady with the engine off until I =
engaged/disengaged the OD a few times. Which, from memory, is what one =
would expect. At this stage I cleaned out the rod. No dirt detected in =
little hole but could easily miss a flake of paint or a piece of =
swarf=E2=80=A6=E2=80=A6<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'>The solenoid makes a healthy =
click and visibly lifts the lever, say, =C2=BC=E2=80=9D. Appears(!) =
healthy. OD seems to go in and out as it should and not slip but wheels =
are off the ground so not a fair test for slippage. =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'>The whole OD was rebuilt, by OD =
spares about 15 years ago since when it=E2=80=99s had a fairly relaxed =
time and about 15,000 miles. Very seldom more than 80mph and usually =
cruising at 65mph on Motorway. The front, pump end, was rebuilt by =
ODSpares in late 2021. Car has a 28% OD and a 3:54 diff so 65mph is =
fairly relaxed rev wise.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'>Have not delved into Throttle =
Switch, Relay or Solenoid yet. Will do so, in that order, when weather =
permits test drives.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'>Thank you everyone for your =
help and attention in this matter,<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'>Simon<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Times New =
Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div=
><div style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt =
0cm 0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> Healeys =
<healeys-bounces@autox.team.net> <b>On Behalf Of </b>Bob =
Spidell<br><b>Sent:</b> Friday, April 26, 2024 7:17 PM<br><b>To:</b> =
gradea1@charter.net; healeys@autox.team.net<br><b>Subject:</b> Re: =
[Healeys] Overdrive pressure or clutch slip Step =
2!<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>I lost the plot (not unusual): Have we =
determined, for sure, that the problem is 'slippage,' which would most =
likely be due to wear in the O/D cone clutch? Or have we determined that =
Simon's O/D is 'dropping out' which, to my thinking, would be caused by =
the 8 strong springs overcoming hydraulic pressure (and causing the =
brake ring to slip or disengage, no?). <br><br><o:p></o:p></p><div><p =
class=3DMsoNormal>On 4/26/2024 10:03 AM, Hank Leach =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p =
class=3DMsoNormal>Ok the pressure gauge implies that the hydraulic =
system is in good condition and that will effectively produce overdrive =
when the cone clutch is pushed forward in the box. When OD is =
<strong><span style=3D'font-family:"Aptos",sans-serif'>not =
required</span></strong> the solenoid is inactive and the 8 springs in =
the unit have to keep the cone clutch in the rearward or in direct drive =
position.<o:p></o:p></p></div><div><p class=3DMsoNormal>These are stout =
springs and normally are strong enough to engage and hold the clutch =
without slipping, overcoming the hydraulic influence-which should be =
draining at this point..However if the springs are misinstalled in the =
wrong position or not properly mounted on their tabs upon assembly or =
previously "coil bound" from that procedure or wear, they will =
not function to keep direct drive solid without =
slipping.<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>The clutch material should outlive all of =
us and is not normally, or easily, replaced. All you have to keep the =
car in direct drive are those 8 springs and their pressure.<br>-Hate to =
say it but if the re-assembly was defective, the gearbox needs to come =
out and OD removed and checked for correct spring fit-at that time I =
would replace the 8 springs (about $100 from Moss) as a routine repair. =
(photos from my article in AH Mag) Hank<br><br>From: "Bob =
Spidell" <a =
href=3D"mailto:bspidell@comcast.net";><bspidell@comcast.net></a> =
<br>To: <a =
href=3D"mailto:healeys@autox.team.net";><healeys@autox.team.net></a>=
<br>Sent: April 26, 2024 at 9:37 AM PDT <br>Subject: Re: [Healeys] =
Overdrive pressure or clutch slip Step 2! <br>Spitballing ...<br><br>I =
went through my BJ8's O/D a few years ago. The car had 64K miles on it =
when I bought it (approx. 1984), and about 215K* miles on it when I did =
the overhaul. The O/D cone clutch was serviceable--and AFAIK didn't =
slip--and I reinstalled it. If new cone clutches were readily available =
I <em><span style=3D'font-family:"Aptos",sans-serif'>might</span></em> =
have bought new, on principle, depending on cost, but all I could find =
was a re-manned one from DWM. To me this implied they didn't often need =
replacement, whereas known wear items like the accumulator are offered =
by several vendors (I would have installed one with an O-ring if I'd =
known about it).<br><br>All this to say, unless the car has extremely =
high mileage and/or the O/D has been abused somehow I'd be surprised if =
the clutch is worn 'to the bone.' Obviously, slippage in the cone clutch =
would cause Simon's car's symptoms; if so, the problem will get =
progressively worse (and more consistent). I think one way to test an =
O/D clutch would be to really lug the car pulling an uphill grade in =
4th-O/D, if the clutch is going to slip it would do it then (as would a =
worn engine clutch). There's also a (remote) possibility that, for some =
reason, O/D pressure fluctuates during driving.<br><br><br>* Anyone else =
have this many or more known miles on a =
Healey?<br><br>bs<br><br><br><o:p></o:p></p></div><div><p =
class=3DMsoNormal>On 4/26/2024 4:51 AM, Michael Salter =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p =
class=3DMsoNormal><span style=3D'font-size:9.5pt;font-family:"Times New =
Roman",serif'>"What I can=E2=80=99t do is understand the leap to =
the OD cone clutch?"</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:9.5pt;font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:9.5pt;font-family:"Times New =
Roman",serif'> Fair question.</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:9.5pt;font-family:"Times New =
Roman",serif'>Between the flywheel and the rear wheels there are only 2 =
places where "slippage" can occur these are the clutch and the =
overdrive's cone clutch. </span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:9.5pt;font-family:"Times New =
Roman",serif'>The gearbox, other than the cone clutch in the overdrive, =
is a go/no go arrangement, i.e. no =
"slippage".</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:9.5pt;font-family:"Times New =
Roman",serif'>The rear wheel splines, believe it or not, can also =
produce "slippage " if they are in really bad condition but I =
presume that isn't the case here.</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:9.5pt;font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:9.5pt;font-family:"Times New =
Roman",serif'>The test that you just completed resulted in no driveline =
slippage when the overdrive was =
disabled. </span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:9.5pt;font-family:"Times New =
Roman",serif'>You are reporting slippage when the overdrive operating =
system is enabled so it follows that further diagnosis of that is =
required.</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:9.5pt;font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:9.5pt'>Yes, your next step =
would be the same test drive, i.e. full engine torque on an uphill =
grade, to confirm that the slippage issue has returned now that the =
overdriveoperating valvehasbe =
re-installed. </span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:9.5pt'>I would do this test =
drive BEFORE making any adjustments to the overdrive valve or solenoid =
in order to confirm that meerly installing the overdrive operating valve =
resulted in the slippage issue =
returning. </span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:9.5pt'>Hope the weather =
improves, beautiful day here.</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:9.5pt'>M</span><o:p></o:p></p></div></div><p =
class=3DMsoNormal><o:p> </o:p></p><div><div><p class=3DMsoNormal>On =
Fri., Apr. 26, 2024, 7:24 a.m. Simon Lachlan, <<a =
href=3D"mailto:simon.lachlan@alexarevel.plus.com"; =
target=3D"_blank">simon.lachlan@alexarevel.plus.com</a>> =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm =
6.0pt;margin-left:4.8pt;margin-right:0cm'><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>Hi, Thanks for =
this.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>Not sure I understand =
fully. </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>Once I=E2=80=99d finished =
the test drive with the OD operating valve out of the car, I returned =
the rod, ball, spring etc and put in the gauge rather than the nut. And =
got 500+ psi. </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>What I can=E2=80=99t do is =
understand the leap to the OD cone clutch. Not arguing=E2=80=A6just =
saying no comprende. As I sat in the car, I was thinking that the =
function of the OD seems OK and that it=E2=80=99s being interfered with =
by something in its circuitry=E2=80=A6=E2=80=A6relay, solenoid or =
throttle switch. That=E2=80=99s probably wishful thinking as I really =
don=E2=80=99t want to be swimming in those =
waters.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>I did, as a matter of =
course, clean out the tiny hole in the rod but didn=E2=80=99t detect any =
blockage=E2=80=A6.which doesn=E2=80=99t mean much as something minute =
could have been inside and been washed away by the detergent/hot water =
then WD40=E2=80=A6..</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>After someone=E2=80=99s =
advice =E2=80=93 some time back =E2=80=93 I=E2=80=99ve got another rod =
whose aperture has been drilled out to 1.5mm. This was =E2=80=9Cto allow =
the OD to disengage faster=E2=80=9D. Don=E2=80=99t recall if I tried it. =
Could that rod be any help here?</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>The ball seems to be =
sitting square on its seat and the tip of the rod, where the ball sits, =
is not worn or chipped.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>Residual =
pressure=E2=80=A6.. goes to 500+ when I switch OD ON and stays there =
until, engine and switch OFF, I energize the solenoid a few times =
whereupon it drops to zero.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>Another test drive(s) =
seems called for. But the hood is off to enable access and the forecast =
is grim for the next week.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>Very open to more =
suggestions. Thanks,</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'>Simon</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><spa=
n =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/strong><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> Michael =
Salter <<a href=3D"mailto:michaelsalter@gmail.com"; =
target=3D"_blank">michaelsalter@gmail.com</a>> <br><strong><span =
style=3D'font-family:"Calibri",sans-serif'>Sent:</span></strong> Friday, =
April 26, 2024 12:14 AM<br><strong><span =
style=3D'font-family:"Calibri",sans-serif'>To:</span></strong> Simon =
Lachlan <<a href=3D"mailto:simon.lachlan@alexarevel.plus.com"; =
target=3D"_blank">simon.lachlan@alexarevel.plus.com</a>><br><strong><s=
pan style=3D'font-family:"Calibri",sans-serif'>Cc:</span></strong> =
Healeys <<a href=3D"mailto:healeys@autox.team.net"; =
target=3D"_blank">healeys@autox.team.net</a>><br><strong><span =
style=3D'font-family:"Calibri",sans-serif'>Subject:</span></strong> Re: =
Overdrive pressure or clutch slip Step 2!</span><o:p></o:p></p></div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Okay, then =
it is confirmed that neither the clutch (on the flywheel) nor the =
overdrive cone clutch (in it's normal drive condition) are producing the =
slippage. <o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>From this =
we can conclude that even when the overdrive solenoid is =
<strong><u><span =
style=3D'font-family:"Aptos",sans-serif'>not</span></u></strong> =
energized the slippage is occurring at the overdrive cone clutch =
and that for some reason hydraulic pressure is finding its way into the =
overdrive operating cylinders even when the overdrive operating valve is =
closed.<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>This can be =
caused by leakage past operating the valve or residual =
pressure.<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>The =
question of residual pressure can be resolved by checking that the bleed =
hole in the bottom of the long overdrive valve push rod is not =
blocked.<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Whether or =
not hydraulic pressure is leaking past the operating valve ball can be =
checked by ensuring that the ball is clearly on its seat when the =
operating valve is <strong><u><span =
style=3D'font-family:"Aptos",sans-serif'>not </span></u></strong>&nb=
sp;energized.<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>M<o:p></o:p>=
</p></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Thu., =
Apr. 25, 2024, 3:38 p.m. Simon Lachlan, <<a =
href=3D"mailto:simon.lachlan@alexarevel.plus.com"; =
target=3D"_blank">simon.lachlan@alexarevel.plus.com</a>> =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm =
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5=
0pt'><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>Of course. Isn=E2=80=99t =
that how I got the 520psi?</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><spa=
n =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/strong><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> Michael =
Salter <<a href=3D"mailto:michaelsalter@gmail.com"; =
target=3D"_blank">michaelsalter@gmail.com</a>> <br><strong><span =
style=3D'font-family:"Calibri",sans-serif'>Sent:</span></strong> =
Thursday, April 25, 2024 6:19 PM<br><strong><span =
style=3D'font-family:"Calibri",sans-serif'>To:</span></strong> Simon =
Lachlan <<a href=3D"mailto:simon.lachlan@alexarevel.plus.com"; =
target=3D"_blank">simon.lachlan@alexarevel.plus.com</a>><br><strong><s=
pan style=3D'font-family:"Calibri",sans-serif'>Cc:</span></strong> =
Healeys <<a href=3D"mailto:healeys@autox.team.net"; =
target=3D"_blank">healeys@autox.team.net</a>><br><strong><span =
style=3D'font-family:"Calibri",sans-serif'>Subject:</span></strong> Re: =
Overdrive pressure or clutch slip Step 2!</span><o:p></o:p></p></div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Question&nbs=
p; ... when you got home and did the pressure test I presume that was =
AFTER you had put the valve with the "top hat", ball, spring =
and valve rod cap and washer back into position?<o:p></o:p></p><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>M<o:p></o:p>=
</p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p></div></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Thu., =
Apr. 25, 2024, 12:29 p.m. Simon Lachlan, <<a =
href=3D"mailto:simon.lachlan@alexarevel.plus.com"; =
target=3D"_blank">simon.lachlan@alexarevel.plus.com</a>> =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm =
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5=
0pt'><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>So, here is =
Michael=E2=80=99s =E2=80=9CStep 1=E2=80=9D completed. (See his email, =
below).</span><o:p></o:p></p><ol start=3D1 type=3D1><li =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 =
level1 lfo1'><span style=3D'font-family:"Times New Roman",serif'>Removed =
the operating valve and, just for luck, disconnected the two wires into =
3<sup>rd</sup>/4<sup>th</sup> switch. Took the car for a spin. Up/down =
longish/steepish hills, 10 miles on motorway. Various rpm=E2=80=A6..no =
slippage at all.</span><o:p></o:p></li><li class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 =
level1 lfo1'><span style=3D'font-family:"Times New Roman",serif'>Had a =
puncture=E2=80=A6..nail in tyre. Rear RHS. Flat as a pancake at once. =
Nearly onto rim. Nail! I imagine the inner tube is shredded and the tyre =
may be a write-off. (Usually are!). Anyhow, I bore you with this as =
I=E2=80=99m convinced that I=E2=80=99d never have got the wheel off =
without the little scissors jack which I carry to get the car up the =
first few inches until the Healey jack comes into play. Just a =
suggestion=E2=80=A6=E2=80=A6.</span><o:p></o:p></li><li =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 =
level1 lfo1'><span style=3D'font-family:"Times New Roman",serif'>Got =
home and jacked car up to test pressure. Steady at 520psi which, I =
recall, is plenty. Stayed at 520 across rev range. Dropped very slowly =
once engine was off and dropped to zero as I engaged/disengaged OD a few =
times. Which is normal I think?</span><o:p></o:p></li><li =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 =
level1 lfo1'><span style=3D'font-family:"Times New =
Roman",serif'>Solenoid makes a robust =E2=80=9Cclick=E2=80=9D when it =
should and engages the OD when activated.</span><o:p></o:p></li></ol><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>So what=E2=80=99s a =
sensible =E2=80=9CStep 2=E2=80=9D??</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>I have been urged to check =
the setting of the Throttle Switch (TS). Assuming that the slippage =
returns (and why wouldn=E2=80=99t it?), I=E2=80=99ll short the TS out to =
see if that fixes it. If it does, I=E2=80=99ll check the =
adjustment.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>Suggestions would be more =
than welcome=E2=80=A6=E2=80=A6I do dread having to take that box out =
again. I=E2=80=99ve got a very adequate ramp and a very strong =
volunteer(?) but, regardless of all that, it=E2=80=99s still quite a =
task. And, like a few of us, I=E2=80=99m not as young as I once was. =
I=E2=80=99ve always enjoyed the lines from the manual which I reproduce, =
below. </span><span =
style=3D'font-family:"Tahoma",sans-serif'>=EF=BF=BD=EF=BF=BD=EF=BF=BD</sp=
an><span style=3D'font-family:"Times New Roman",serif'>Gently =
ease=E2=80=9D!?! </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New Roman",serif'>Thanks, =
Simon</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-family:"Times New =
Roman",serif'> </span><o:p></o:p></p><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><spa=
n =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/strong><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> Michael =
Salter <<a href=3D"mailto:michaelsalter@gmail.com"; =
target=3D"_blank">michaelsalter@gmail.com</a>> <br><strong><span =
style=3D'font-family:"Calibri",sans-serif'>Sent:</span></strong> Monday, =
April 22, 2024 3:21 PM<br><strong><span =
style=3D'font-family:"Calibri",sans-serif'>To:</span></strong> Simon =
Lachlan <<a href=3D"mailto:simon.lachlan@alexarevel.plus.com"; =
target=3D"_blank">simon.lachlan@alexarevel.plus.com</a>><br><strong><s=
pan style=3D'font-family:"Calibri",sans-serif'>Cc:</span></strong> =
Healeys <<a href=3D"mailto:healeys@autox.team.net"; =
target=3D"_blank">healeys@autox.team.net</a>><br><strong><span =
style=3D'font-family:"Calibri",sans-serif'>Subject:</span></strong> Re: =
[Healeys] Overdrive pressure or clutch =
slip</span><o:p></o:p></p></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><u><=
span style=3D'font-family:"Aptos",sans-serif'>Correct diagnosis is 1/2 =
the repair!!</span></u></strong><o:p></o:p></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>First you =
need to confirm whether the clutch (on the flywheel) or the overdrive is =
causing the slippage. <o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>To do this =
you ABSOLUTELY MUST disable the overdrive as a badly misadjuster =
overdrive operating valve can produce similar =
symptoms. <o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>To do this =
I would remove the overdrive operating valve completely. (There are =
other ways but this is absolutely =
definitive).<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Now drive =
the car up a long hill where you are amle to use full throttle at around =
3000 RPM (maximum torque) for a few seconds. If it is the clutch (on the =
flywheel) that is causing the slippage these operating conditions. Test =
this a few times to be sure.<o:p></o:p></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>If there is =
no slippage we have confirmed that the overdrive clutch is at =
fault.<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Step 1 =
completed. Please report results. MS.<o:p></o:p></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><=
/o:p></p><div><blockquote style=3D'border:none;border-left:solid #CCCCCC =
1.0pt;padding:0cm 0cm 0cm =
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5=
0pt'><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Mon., =
Apr. 22, 2024, 8:08 a.m. Simon Lachlan via Healeys, <<a =
href=3D"mailto:healeys@autox.team.net"; =
target=3D"_blank">healeys@autox.team.net</a>> =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm =
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5=
0pt'><div><p><span style=3D'font-family:"Times New Roman",serif'>You =
may recall the very extended overdrive and clutch saga last year.</span> =
<span style=3D'font-family:"Times New Roman",serif'>Long story =
short(ish)=E2=80=A6</span><o:p></o:p></p><p><span =
style=3D'font-family:"Times New Roman",serif'>OD was slipping in and out =
depending on oil temperature.</span><o:p></o:p></p><p><span =
style=3D'font-family:"Times New Roman",serif'>Correctly diagnosed =
pressure. Checked with gauge.</span><o:p></o:p></p><p><span =
style=3D'font-family:"Times New Roman",serif'>Attempted =
rebuild=E2=80=A6going only so far as</span> <span =
style=3D'font-family:"Times New Roman",serif'>accumulator and related =
seals.</span><o:p></o:p></p><p><span style=3D'font-family:"Times New =
Roman",serif'>Stymied as could not get pump out. Turned out to have been =
=E2=80=9Cfixed=E2=80=9D at some stage with some form of =
=E2=80=9Cchemical metal=E2=80=9D which was coming =
loose/apart.</span><o:p></o:p></p><p><span style=3D'font-family:"Times =
New Roman",serif'>Took it up to OD Spares who fixed it..new housing =
etcetc</span><o:p></o:p></p><p><span style=3D'font-family:"Times New =
Roman",serif'>Why not a new clutch I thought? Sensible while =
you=E2=80=99re in the area looking at a 30+ yr old =
item.</span><o:p></o:p></p><p><span style=3D'font-family:"Times New =
Roman",serif'>New clutch=E2=80=A6no good. Noisy, wouldn=E2=80=99t</span> =
<span style=3D'font-family:"Times New =
Roman",serif'>engage/disengage/play at =
all.</span><o:p></o:p></p><p><span style=3D'font-family:"Times New =
Roman",serif'>Gearbox out again.</span><o:p></o:p></p><p><span =
style=3D'font-family:"Times New Roman",serif'>Refit clutch. Presumed =
I=E2=80=99d made some beginner=E2=80=99s =
mistake.</span><o:p></o:p></p><p><span style=3D'font-family:"Times New =
Roman",serif'>Refit gearbox=E2=80=A6no good. =
Same</span><o:p></o:p></p><p><span style=3D'font-family:"Times New =
Roman",serif'>Can=E2=80=99t recall whether I tried again. Lost count and =
enthusiasm by now.</span><o:p></o:p></p><p><span =
style=3D'font-family:"Times New Roman",serif'>Turned out that the new =
clutch kit was defective. (Thanks Mirek) (Genuine B&B from =
AHSpares).</span><o:p></o:p></p><p><span style=3D'font-family:"Times New =
Roman",serif'>New one did work.</span><o:p></o:p></p><p><span =
style=3D'font-family:"Times New Roman",serif'>Saga over until =
yesterday.</span><o:p></o:p></p><p><span style=3D'font-family:"Times New =
Roman",serif'>Same sort of =
symptoms=E2=80=A6..</span><o:p></o:p></p><p><span =
style=3D'font-family:"Times New Roman",serif'>All=E2=80=99s well for =
first 10 or so miles. Then the dreaded slippage(?) starts. But =
it=E2=80=99s not quite the same. Reminds me more of a slipping clutch. =
(But NO smell)</span><o:p></o:p></p><p><span style=3D'font-family:"Times =
New Roman",serif'>Symptoms continue if it=E2=80=99s in or out of =
OD.</span><o:p></o:p></p><p><span style=3D'font-family:"Times New =
Roman",serif'>Symptoms reduce at speed.</span><o:p></o:p></p><p><span =
style=3D'font-family:"Times New Roman",serif'>Yes, plenty of oil. Over =
the full mark. Looks very clean. Pretty sure it=E2=80=99s 40wt</span> =
<span style=3D'font-family:"Times New Roman",serif'>non-detergent topped =
up with 30wt non-detergent. (Or vice-versa).</span> <span =
style=3D'font-family:"Times New Roman",serif'>Am confident in state of =
the filter, magnets etc.</span><o:p></o:p></p><p><span =
style=3D'font-family:"Times New Roman",serif'>No, I have not pressure =
tested it yet and yes, I dread restarting the whole bloody process all =
over again. I=E2=80=99m not sure I can face taking the box out again =
once, let alone multiple times.</span><o:p></o:p></p><p><span =
style=3D'font-family:"Times New Roman",serif'>What I want and experience =
tells me I=E2=80=99m unlikely to get is a miracle =
cure!</span><o:p></o:p></p><p><span style=3D'font-family:"Times New =
Roman",serif'>One initial question=E2=80=A6..do OD relays either work or =
not work? ie, can the relay hover between on and off</span> <span =
style=3D'font-family:"Times New Roman",serif'>which might lead to the OD =
coming in and out? I think that could happen if the switch is off but =
the unit still hasn=E2=80=99t got the message to disengage from the =
bulkhead switch.</span><o:p></o:p></p><p><span =
style=3D'font-family:"Times New Roman",serif'>And a =
supplementary=E2=80=A6.how</span> <span style=3D'font-family:"Times New =
Roman",serif'>do I bench test</span> <span style=3D'font-family:"Times =
New Roman",serif'>the relay?</span><o:p></o:p></p><p><span =
style=3D'font-family:"Times New =
Roman",serif'>Simon</span><o:p></o:p></p></div></blockquote></div></block=
quote></div></div></div></blockquote></div></div></div></blockquote></div=
></div></div></blockquote></div><p =
class=3DMsoNormal><o:p> </o:p></p><pre>_____________________________=
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