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A-Type OD Problem

To: <6pack@autox.team.net>
Subject: A-Type OD Problem
From: "Mark Campbell" <MCampbell@bstg.com.au>
Date: Mon, 3 Jul 2006 10:29:51 +0930
G'day Listers.
First time I've contacted you.  Just purchased my first classic car, a
1970 TR6 (Damson) with A Type overdrive, and immediately have a problem.
Perhaps I should have just stood out in the rain and got my wife to beat
me with a large piece of tree.
On the drive home after picking up the car the overdrive was fine to
start but then would not stay engaged.  Only started happening after
about 15 minutes at freeway speeds so I presume when the gearbox and OD
unit were fully warm.  OD would engage on a VERY steady throttle but as
soon as I squeezed the pedal it would drop out.  Sometimes would only
engage for a fraction of a second and then out again.
I've checked the workshop manual (always a bit of a worry when you buy a
car and the DPO hands you the manual as you drive away) and it suggests
the problem could be accumulator pistons worn or sticking OR oil level.
I hope it's the oil level but I wonder if anyone out there has any words
of wisdom to pass on.  The car did mark its territory as soon as I got
home and I had noticed a "weeping" oil leak from the OD rear oil seal
when doing my under car inspection prior to purchase but it certainly
didn't look bad.
I contacted Penrite Oils and they recommend using their 30 weight gear
oil.  Any suggestions?
Anyway, you guys seem to be the "experts" so I'm entirely at your mercy.
Please be gentle with a newbie.  Happy Independence Day weekend from
Australia.
Regards,
Mark Campbell
70 TR6 Damson


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