[Fot] Does anyone know of an additive that improves a TR6 tranny's smoothness of operation?

[Steven Preiss]

I have been using straight 30W with no additives at the recommendation of
John Esposito from Quantum Mechanics, who rebuilt the transmission and
overdrive units. After a somewhat balky beginning, the box has become very
nice to shift and quiet in operation. The A-type OD engages strong and
smooth. However, the oil does not stay in. In fact it leaks even when TR3 is
sitting cold and idle. So, question I have is, is this a good choice for
break in, and not for ongoing use? As the car is run on the street, I would
hate to lose track of the oil level and burn the thing up! Any advice?
Steve P.

----- Original Message ----- 
From: "William G Rosenbach" <wgrosenbach at juno.com>
To: <fot at autox.team.net>
Sent: Monday, March 24, 2008 6:34 AM
Subject: Re: [Fot] Does anyone know of an additive that improves a TR6
tranny's smoothness of operation?


> The folks at 3R Racing, in cars they prep for vintage racing will use
> Redline MT-90 (GL-4) in gearboxes that are about to be due for rebuild. I
> used it in a Renault transaxle and it greatly improved shifting, both up
> and down. With mineral base, multi vis GL-5, the hotter it got, the worse
> the shifting got very quickly. Redline was not as much effected by temp.
> The synthetic did not like to stay in the gearbox, however.
> Changing to a straight weight, GL-4 mineral base oil was a huge
> improvement over the GL-5, almost as good as the Redline, though not
> quite as good hot, and it stayed in the box.
> I conclude the most important thing was a GL-4 oil.
> Bill
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