Brian:
Did your rebuild of the OD include a new or reconditioned cone
clutch?
The friction material should be roughly 0.100" thick new, worn out at
0.040".
If it is worn, it will slip.
Another possible symptom: When the transmission is nice and hot,
put the
car in reverse and accelerate. Does the car act as if the clutch is
slipping?
You may also notice a whining noise in reverse when hot. These are
symptoms of
a worn cone clutch.
Rebuilt ones are available from Quantum.
Vance
-----Original Message-----
From: owner-6pack@Autox.Team.Net [mailto:owner-6pack@Autox.Team.Net] On
Behalf Of Brian
Sent: January 14, 2007 7:02 PM
To: 6pack@autox.team.net
Subject: Rebuilt Overdrive Not Functioning
Dear 6packers:
I just finished installing a rebuilt A-type overdrive in a 1972 TR6.
Some of
you previously answered questions I had on cable routing - again, thank
you.
The good news is the box shifts well and the clutch works great with the
Gunst bearing. The problem I have is that the overdrive kicks in and out
just fine while the vehicle is on jacks, but while driving, under load,
it
will not. Believing I put everything together right (all new seals,
springs,
bearings) and adjusted things properly, I put a pressure gauge on the
operating valve tap. I get just over 300 pounds at 60 MPH. By the way,
the
overdrive is an early A-type from a 1960 TR3A. It has the large, simple
accumulator. Some things I read say that 300 lbs. is too low. Has anyone
had
a similar experience?
Much appreciated.
Brian Alwin
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