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Re: [TR] GT6 trans bearing noise on launch -

To: triumphs@autox.team.net
Subject: Re: [TR] GT6 trans bearing noise on launch -
From: Q <HDRider570@att.net>
Date: Tue, 21 Feb 2023 14:33:32 -0800
Delivered-to: mharc@autox.team.net
Delivered-to: triumphs@autox.team.net
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Interesting wear on the gear cluster end. I expect that it has worn 
through the (presumably) harden wear surface to the softer material 
underneath.  At a minimum I would fit a hardened shim to bring the 
surface level again.

Looks like odd surface marking on the inner solid bushing as well.  Is 
it just brass or is it oilite material?  They make a kit for the big TR 
gearbox so two bearings can be installed on each end of the gear 
cluster.  The problem would be to find a caged roller with a race that 
would fit (McMaster-Carr?).  You would need to turn the gear cluster to 
fit the outer diameter of the new bearing.  That is not an easy job 
either as the surface of the cluster is hardened to be a bearing race 
for the loose needle bearings.  Please note that if you are using loose 
bearings they come in packs of 50 but you only use 49 of them.

I would not use the chipped cluster.  Too much surface area is missing 
and the harden surface remaining may be detaching form the body.

There was a time when there were some counter shafts that were of 
inferior quality as well.  I don't know if that is still the  case but I 
certainly would not purchase parts from "The lowest bidder" regardless.

Your best bet would be to find a good replacement cluster but GT6 trans 
parts are few and far between.

Please note I am not a professional transmission mechanic, just lending 
my opinion based on personal Triumph experience over the years.


Edward Hamer

Petaluma CA

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