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I'm very confident that they know what they're doing having worked on hund=
reds of transmissions and overdrives, and they've made the similar=C2=A0as=
sessments that you have, that it's not that complex and they are stymied w=
hy they're not finding an obvious=C2=A0issue. =C2=A0They've replace the o-=
rings on the pistons and checked every seal and journal hoping to find som=
e scratch or something. =C2=A0And yes, at moderate speed, 40 mph in 3rd or=
4th, switching on the OD it shifts right in. =C2=A0It's not until it's un=
der load that it drops back out. =C2=A0They've done test drives with the p=
ressure gauge on it, and it doesn't sound like there's a time when there i=
s too much pressure, but IDK for sure so I'll forward your email to them.=0A=
=0ARye=0A=0AOn Jun 10, 2016, at 05:22 PM, David Porter <frogeye@porterscus=
tom.com> wrote:=0A=0AWhat I am reading is that your car has a throttle swi=
tch installed. "when I'm accelerating and flip the switch for OD, it doesn=
't go into OD until I let up."=0AThe switch on the dash activates only the=
solenoid which allows oil pressure to flow into the operating pistons and=
push the clutch assembly into the "OD" mode.=C2=A0 Period. Did I say Peri=
od.=0ASo assuming you are going at least 40MPH, even 200PSI will engage (r=
egardless of what the books say) All the A units are virtually identical. =
Now, having said that, Triumph did specify differences in the accumulator/=
lack of accumulator and accumulator spring.=0ASo, you told me before that =
there is no throttle switch (kick down relay) installed, therefore it soun=
ds to me that there is too much pressure at increased rpm and it is blowin=
g the oil pressure past the currently installed o-rings and or piston ring=
s. After you decrease engine (ergo pump speed) it re-engages. I would cert=
ainly replace the rings and rubber O-rings. There is no modern computer in=
volved. This is a purely 'mechanical' issue. Your shop should have found t=
he issue by now???=0ADaveP=0A=0AOn 6/10/2016 9:50 AM, Rye Livingston wrote=
:=0ATransmission update - for those reading about this for the first time,=
this is a 1960 TR3 with a TR4 OD transmission. Yesterday they said it's b=
asically a TR250 transmission. The whole transmission and OD was rebuilt b=
y=C2=A0a British car specialist of 40+ years. =C2=A0His employee has also =
been working on British cars for years, and is a transmission specialist. =
=C2=A0They've rebuilt literally 100s of transmissions and ODs. =C2=A0They =
had 4 OD cores on their bench as they were showing me different parts of t=
he system.=0A=0ASymptom -=C2=A0when I'm accelerating and flip the switch f=
or OD, it doesn't go into OD until I let up. =C2=A0When in 2-3 or 4th gear=
, OD engaged, and punch it, it will downshift like an automatic transmissi=
on while I accelerate, then shift back into OD when I let up.=0A=0AI'm not=
technical enough to know how to describe all what they told me, but I'll =
try. =C2=A0First off, I forwarded the comments when I posted this issue a =
couple of weeks=C2=A0ago, and keep in mind it's not the easy/obvious thing=
s. =C2=A0They've checked all the electrical, solenoids, ground, oil type, =
etc. =C2=A0When in OD it's not slipping. =C2=A0They've tested the PSI with=
a gauge attached while driving down the expressway, and jacked up with th=
e wheels off the ground. =C2=A0=0A=0AThe issue is that it's not getting hi=
gh enough PSI. =C2=A0It's over 400 PSI, but it needs to be 490 to over 500=
, I think they said 520. =C2=A0They've taken the transmission back out, ta=
ken the OD all apart, and there's nothing obvious. They've changed the pis=
ton in the pump. Originally it had a pump that would shift softer because =
I've got a torquey engine and the other pump, which they called a competit=
ion pump, would be hard on the differential, but they've got that one in t=
he car now. =C2=A0 They showed me a seal that goes around that piston and =
said the new seals=C2=A0are=C2=A0rubber and they got one like the original=
style that has some sort of metal reinforcement in it to hopefully make a=
better seal. =C2=A0Not very clear I know, but hopefully that=C2=A0makes s=
ense. =C2=A0They've checked the seats where a small ball bearing must make=
a perfect seal, they all look perfect. =C2=A0They said everything looks a=
bsolutely pristine. =C2=A0No scoring down passageways that might not allow=
maximum PSI, etc. =C2=A0They also showed me the lining on a=C2=A0Sun gear=
they had on the beach, and said mine looked good and the rivets looked or=
iginal.=C2=A0They put it all back together, went for a test drive, and tha=
t didn't fix it.=0A=0AThey've spent literally 20+ hours on this transmissi=
on, plus several more hours doing internet research on the problem. =C2=A0=
As they described everything and what they've checked, which seems like ev=
erything, I said I'd send out this email to the list. =C2=A0Not that they =
haven't tried everything, but I'm hoping there may be one little nugget of=
info they haven't tried, or a test they can run, that will=C2=A0lead to t=
he solution.=0A=0AThanks,=0A=0ARye Livingston=0ATriumph Travelers Sports C=
ar Club=0AActivities Chairman=0A1960 TR3A=0APH: 530-FIND-RYE=0A=0A=0A** tr=
iumphs@autox.team.net **=0A=0ADonate: http://www.team.net/donate.html=0AAr=
chive: http://www.team.net/archive=0AForums: http://www.team.net/forums=0A=
@porterscustom.com=0A=0A-- =0ADave Porter Porter Custom Bicycles 2909 Arno=
St. NE Albuquerque, NM 87107 505-352-1378 Go HERE: my world www.porterbik=
es.com/=
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<html><body><div></div><div>I'm very confident that they know what they're
doing havin=
g worked on hundreds of transmissions and overdrives, and they've made the=
similar assessments that you have, that it's not that complex and th=
ey are stymied why they're not finding an obvious issue. They'v=
e replace the o-rings on the pistons and checked every seal and journal ho=
ping to find some scratch or something. And yes, at moderate speed, =
40 mph in 3rd or 4th, switching on the OD it shifts right in. It's n=
ot until it's under load that it drops back out. They've done test d=
rives with the pressure gauge on it, and it doesn't sound like there's a t=
ime when there is too much pressure, but IDK for sure so I'll forward your=
email to them.</div><div><br data-mce-bogus=3D"1"></div><div>Rye</div><di=
v class=3D"x-apple-signature"></div><div><br>On Jun 10, 2016, at 05:22 PM,=
David Porter <frogeye@porterscustom.com> wrote:<br><br></div><div><=
blockquote type=3D"cite"><div class=3D"msg-quote" bgcolor=3D"#FFFFFF" text=
=3D"#000000"><p>What I am reading is that your car has a throttle switch i=
nstalled. "when I'm accelerating and flip the switch for OD, it doesn't go=
into OD until I let up."</p><p>The switch on the dash activates only the =
solenoid which allows oil pressure to flow into the operating pistons and =
push the clutch assembly into the "OD" mode. Period. Did I say Perio=
d.</p><p>So assuming you are going at least 40MPH, even 200PSI will engage=
(regardless of what the books say) All the A units are virtually identica=
l. Now, having said that, Triumph did specify differences in the accumulat=
or/lack of accumulator and accumulator spring.</p><p>So, you told me befor=
e that there is no throttle switch (kick down relay) installed, therefore =
it sounds to me that there is too much pressure at increased rpm and it is=
blowing the oil pressure past the currently installed o-rings and or pist=
on rings. After you decrease engine (ergo pump speed) it re-engages. I wou=
ld certainly replace the rings and rubber O-rings. There is no modern comp=
uter involved. This is a purely 'mechanical' issue. Your shop should have =
found the issue by now???</p><p>DaveP<br></p><br><div class=3D"moz-cite-pr=
efix">On 6/10/2016 9:50 AM, Rye Livingston wrote:<br></div><blockquote typ=
e=3D"cite"><div>Transmission update - for those reading about this for the=
first time, this is a 1960 TR3 with a TR4 OD transmission. Yesterday they=
said it's basically a TR250 transmission. The whole transmission and OD w=
as rebuilt by a British car specialist of 40+ years. His employ=
ee has also been working on British cars for years, and is a transmission =
specialist. They've rebuilt literally 100s of transmissions and ODs.=
They had 4 OD cores on their bench as they were showing me differen=
t parts of the system.</div><div><br></div><div>Symptom - when I'm ac=
celerating and flip the switch for OD, it doesn't go into OD until I let u=
p. When in 2-3 or 4th gear, OD engaged, and punch it, it will downsh=
ift like an automatic transmission while I accelerate, then shift back int=
o OD when I let up.</div><div><br></div><div>I'm not technical enough to k=
now how to describe all what they told me, but I'll try. First off, =
I forwarded the comments when I posted this issue a couple of weeks a=
go, and keep in mind it's not the easy/obvious things. They've check=
ed all the electrical, solenoids, ground, oil type, etc. When in OD =
it's not slipping. They've tested the PSI with a gauge attached whil=
e driving down the expressway, and jacked up with the wheels off the groun=
d. </div><div><br></div><div>The issue is that it's not getting high=
enough PSI. It's over 400 PSI, but it needs to be 490 to over 500, =
I think they said 520. They've taken the transmission back out, take=
n the OD all apart, and there's nothing obvious. They've changed the pisto=
n in the pump. Originally it had a pump that would shift softer because I'=
ve got a torquey engine and the other pump, which they called a competitio=
n pump, would be hard on the differential, but they've got that one in the=
car now. They showed me a seal that goes around that piston and sa=
id the new seals are rubber and they got one like the original s=
tyle that has some sort of metal reinforcement in it to hopefully make a b=
etter seal. Not very clear I know, but hopefully that makes sen=
se. They've checked the seats where a small ball bearing must make a=
perfect seal, they all look perfect. They said everything looks abs=
olutely pristine. No scoring down passageways that might not allow m=
aximum PSI, etc. They also showed me the lining on a Sun gear t=
hey had on the beach, and said mine looked good and the rivets looked orig=
inal. They put it all back together, went for a test drive, and that =
didn't fix it.<br></div><div><br></div><div>They've spent literally 20+ ho=
urs on this transmission, plus several more hours doing internet research =
on the problem. As they described everything and what they've checke=
d, which seems like everything, I said I'd send out this email to the list=
. Not that they haven't tried everything, but I'm hoping there may b=
e one little nugget of info they haven't tried, or a test they can run, th=
at will lead to the solution.</div><div><br></div><div>Thanks,</div><=
div><br></div><div>Rye Livingston<br></div><div>Triumph Travelers Sports C=
ar Club</div><div>Activities Chairman</div><div>1960 TR3A</div><div>PH: 53=
0-FIND-RYE</div><br><fieldset class=3D"mimeAttachmentHeader"></fieldset><b=
r><pre>** <a class=3D"moz-txt-link-abbreviated" href=3D"mailto:triumphs@au=
tox.team.net" data-mce-href=3D"mailto:triumphs@autox.team.net";>triumphs@au=
tox.team.net</a> **=0A=0ADonate: <a class=3D"moz-txt-link-freetext" href=3D=
"http://www.team.net/donate.html"; data-mce-href=3D"http://www.team.net/don=
ate.html">http://www.team.net/donate.html</a>=0AArchive: <a class=3D"moz-t=
xt-link-freetext" href=3D"http://www.team.net/archive"; data-mce-href=3D"ht=
tp://www.team.net/archive">http://www.team.net/archive</a>=0AForums: <a cl=
ass=3D"moz-txt-link-freetext" href=3D"http://www.team.net/forums"; data-mce=
-href=3D"http://www.team.net/forums";>http://www.team.net/forums</a>=0AUnsu=
bscribe/Manage: <a class=3D"moz-txt-link-freetext" href=3D"http://autox.te=
am.net/mailman/options/triumphs/frogeye@porterscustom.com" data-mce-href=3D=
"http://autox.team.net/mailman/options/triumphs/frogeye@porterscustom.com"=
>http://autox.team.net/mailman/options/triumphs/frogeye@porterscustom.com<=
/a>=0A</pre></blockquote><br><div class=3D"moz-signature">-- <br> Dave Por=
ter Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM 87107 505-352-=
1378 Go HERE: my world <a class=3D"moz-txt-link-abbreviated" href=3D"http:=
//www.porterbikes.com/" data-mce-href=3D"http://www.porterbikes.com/";>www.=
porterbikes.com/</a></div></div></blockquote></div></body></html>=
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