We'll,
I might buy into this topic, as I have been thinking about the very same
thing. I have a TR4 with a rebuilt OD that is running at 650PSI. The only
trouble is the OD will not engage!
The electrical circuit checks out fine; the relay works perfectly; changed
the oil; adjusted the top cover switches; checked the filter screen; fitted
a new solenoid and reset the linkage a number of time. But, no cigar!
The overdrive will engage if I manually move the lever forward, applying a
substantial amount of finger pressure to the lever.
I am now wondering if the gear box oil pressure may be causing the problem?
E.g. higher than STD operating pressure, solenoid/lever is not able to over
come the pressure.
Any thoughts would be greatly appreciated before I reach for the fire
lighters!
Peter Vucinic
WORKS-4
TR4
----- Original Message -----
From: "Larry Young" <cartravel@pobox.com>
To: <fot@autox.team.net>
Sent: Thursday, May 16, 2002 8:56 AM
Subject: Overdrive Setup for Racing
> A couple months ago, I knew nothing about overdrives, but now I'm in the
> final stages of rebuilding an overdrive for my TR3 race car. It has the
> early style large accumulator, which is supposed to give more positive
> shifting and is more desirable. My question is, what pressure to run it
> at? Higher pressure will give more positive shifting, but will be harder
> on the drivetrain. I want it to shift well, but don't want to risk a
> broken axle. I've currently got it set up to run at about 390 psi, i.e.
> slightly higher than standard specs.
>
> BTW, everyone should visit the Buckeye Triumphs website
> (www.buckeyetriumphs.org) for some great information on transmissions
> and overdrives. Nelson Reidel should be knighted for a great
> contribution to the Triumph community.
> Larry Young,
> Forever Young Racing
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