Thanks for all you're responses on this matter. From what everyone is saying, I
don't think the layshaft bearings/gears are gone in my tranny. Gears are very
smooth and there are no noises from the tranny that I can hear. But something
has
given out as evidenced by the metal flakes in the tranny oil.
The oil that I drained had lots of fine, I repeat fine, metal bits, no big
chunks,
no grey sludge. I'm gradually clueing in that the PO wasn't very religious
(oops, I
should maybe avoid that phrase!!) about maintenance and fluids. The tranny oil
I
drained was very, very dark. I also see the brake fluid is dark and needs to be
changed. I also can't identify the substance in the rad so I'm gonna flush the
sytem and change that too. And the big one, while the car was up on jack
stands, I
decided to top up the diff. I pumped almost a litre into it!! It was very low.
Based on that track record, I'd almost bet the tranny oil hasn't been changed
since
the OD stopped working about 12+ years ago, according to said PO. I'd also
wager
he's never done anything to the tranny at all so whatever gave out 12 years ago
hasn't gotten worse, just plugged up some tiny opening in the OD works. Maybe
the
large amount of metal flakes are just 12 years worth of normal tranny wear!
I'm gonna keep driving it until the season is over up here, only another two
months
or so. "My mechanic" (the Ottawa version anyway) didn't think anything was
wrong
with the tranny when he checked the car out for me before I bought it. I'll
change
the tranny oil again in a week or so when I'm back from a trip to Seattle. The
new
tranny oil will have had a chance to clean a bit by then. I'll also have a go
at
removing the OD relief valve/dashpot that I couldn't get out before, and find
the
elusive 1 inch spanner and remove the solenoid and clean and check it as well,
and
also clean the pump filter again. All told, maybe another hour for all that,
since
the OD sump has to come off again to completely drain it. If the OD STILL
doesn't
work, then I'll give up for now.
Point taken about the layshaft bearings, though. If I pull the tranny to clean
the
OD, I'll definitely replace those bearings as the car has 72K miles on it and
replacing them seems to be cheap insurance
Rob Christopher
Ottawa, ON
75 TR6 CF27128UODW (the O counting only as Dead Weight right now)
P.S. Side note - anyone in the Seattle area want to show off their cars next
week
while I'm in the area?
Jim Davis wrote:
> Rob,
> Usually there is a crunchy roar or a grinding sound in first and/or
> reverse when the problem is as bad as you describe. An intermittent high
> pitched squeal is sometimes heard early on as the roller bearings begin
> to freeze and break up. By the time you discover chunks of metal, the
> bearings have mostly disintegrated and the laygear is being wallowed out
> by the bearingless shaft. Gently move the car in first, then reverse a
> couple of times (after refilling w/oil) and I bet you notice a grinding
> sound. Should be more noticeable with the carpets and cover removed.
> I've had similar symptoms in 2 O/D TR6's and in both cases the fault
> was layshaft bearings and the O/Ds were fine after thoroughly washing
> out all traces of metal filings.
> In any case, the presence of large steel bits means something
>important
> has given up and you'll have to remove the transmission & O/D to find
> out what. I wouldn't drive the car further as expensive damage will
> likely occur by doing so.
> Good luck, and let me know what you find when you get it apart.
> Jim Davis
> Fortson, GA
> CF38690UO
> CF37325U
>
> Rob Christopher wrote:
> >
> > Hi Jim
> >
> > You add another interesting twist to my investigations with this statement.
> Is
> > there any other symptoms of a destroyed layshaft? Moss catalogue says "Gray
> > sludge (drained from the tranny) means the layshaft and gear are destroyed"
> I
> > admit the oil I drained wasn't pretty, but I'd hardly call it sludge.
> >
> > The tranny shifts smoothly and doesn't grind or make any other obnoxious
> > noises, so what would indicate a toasted layshaft?
> >
> > Rob Christopher
> > Ottawa, ON
> >
> > Jim Davis wrote:
> >
> > > Rob,
> > > There is a very good chance there is nothing wrong with your O/D.
>If
> > > the layshaft (countershaft) bearings have broken up what you are seeing
> > > is their residue and part of the shaft & gear. Not sure if it would be
> > > good or bad news, as the layshaft gear is a bit pricey. The J type O/D's
> > > rarely break up, and the layshaft bearings are a notorious TR tranny
> > > weak spot.
> > > Good luck (and condolences),
> > > Jim Davis
> > > Fortson, GA
> > > CF38690UO (started w/tranny rebuild, ended as a total resto)
> > > CF37325U
> > >
> > > Rob Christopher wrote:
> > > >
> > > > Well, I opened the OD sump on Sat on my 75 TR6 and pulled the pump
> > > > filter and pump itself. Didn't have the right wrench to remove the
> > > > solenoid and couldn't get the relief valve/dashpot out. I didn't find
> > > > anything bad with the pump, but the filter was plugged solid.
> > > >
> > > > This would have been good news if it hadn't been for the fact that it
> > > > was plugged with enough metal flakes to mint a couple of quarters. The
> > > > magnet in the sump was also filled to capacity. I guess I'll have to
> > > > apply those quarters to the price of a rebuild. 8^{
> > > >
> > > > Please offers of condolences only, no need to offer to take this
> > > > paperweight off my hands, I will eventually fix it.
> > > >
> > > > Oh well, I guess I just found my first winter project. And since the
> > > > tranny will be out, I'll have a look at rebuilding that, and maybe a new
> > > > clutch, and it'll be easy to get the diff out then, so maybe rebuild
> > > > that to stop the leaking, and I suppose the half shafts might as well
> > > > come out while it's that much apart.........
> > > >
> > > > --
> > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > > > Rob Christopher | | | | robc@cisco.com
> > > > Hardware Engineer | .|||. .|||. | (613) 271-3585
> > > > Cisco Systems | ..:|||||||:...:|||||||:.. |
> > > > Kanata, Ontario |---------------------------| http://www.cisco.com
> > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >
> > --
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > Rob Christopher | | | | robc@cisco.com
> > Hardware Engineer | .|||. .|||. | (613) 271-3585
> > Cisco Systems | ..:|||||||:...:|||||||:.. |
> > Kanata, Ontario |---------------------------| http://www.cisco.com
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Rob Christopher | | | | robc@cisco.com
Hardware Engineer | .|||. .|||. | (613) 271-3585
Cisco Systems | ..:|||||||:...:|||||||:.. |
Kanata, Ontario |---------------------------| http://www.cisco.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|