[Fot] Gearbox thoughts

[fubog1]

I haven't converted one to the Stag type thrust bearing but I do advocate changing the gearoil regularly (every race or 2), they live a lot longer. The trash in the gearoil eats the washers up, exacerbating the load/wear issue.
Glen

 

 

 

-----Original Message-----
From: Dean Tetterton <tr3a58 at verizon.net>
To: FOT Triumph <fot at autox.team.net>
Sent: Thu, Oct 15, 2015 12:11 pm
Subject: [Fot] Gearbox thoughts


Since we have been thinking about gearbox's. The Stag layshaft was changed by
Triumph to try and make them last longer due to the additional torque of the V8.
They added needle bearings in place of the brass thrust washers at each end and
an additional bearing  in the lay gear at the end where 1st gear is. Has anybody
tried this set up in a racing box? Does it help in the wearing of the layshaft?


The addition of needle bearings means that the spacing of the box inside
where the lay gear rides is greater. The needle bearings being thicker than the
thrust washers. This means that the Stag box is different inside. 
I have been
able to make a tool that will cut the inside of a TR box to be the same as a
Stag. I plan to build a box using the needle bearings. Don't at this time plan
to put another bearing inside the lay gear. If I make the lay gear deeper
inside, I am afraid it will not be hard enough for the bearings to ride inside.


Before doing all this, has any body gone down this road before. If so what
has been the experience? 
Also any body with thoughts chime in. Is it worth the
effort?

Dean
T.

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