[Fot] TR-4 / TR-6 tranny layshaft bearing mod?

[Steve Yott]

Tony,
It is very rare to have a front bearing fail since there is very little load
on the front of the laygear.  I build laygears with the dual rear bearing
setup and also repair worn out laygears by machining in sleeves.   You could
use the longer 1" bearing in the front which would add a slight bit more
capability.  The bearing number for the 1" bearing would be a B-1316 instead
of the standard B-1314.  This should work without any additional machining.
If you would like to have a dual rear bearing feel free to contact me off
list.

Steve Yott

-----Original Message-----
From: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] On
Behalf Of Tony Drews
Sent: Saturday, November 16, 2013 8:46 AM
To: fot at autox.team.net
Subject: [Fot] TR-4 / TR-6 tranny layshaft bearing mod?

Has anyone modified the TR-4 / TR-6 tranny layshaft assembly to accept
larger, higher capacity bearings?  Turns out the root cause of my
transmission failure was the failure of the front needle bearing in the
layshaft assembly.  Before I do the parts search / purchases, I thought I'd
check to see if there's a longevity improvement that can be made there.

It's been a while since the box was apart, and let me tell you - with a
buggered up layshaft shaft the disassembly is challenging.

I'll be replacing, input shaft, layshaft and 3rd gear at least.  Also had a
weird failure where one of the pins that the spring slides onto in the
overdrive is broken off - may have been an assembly issue.

I may have most of the parts needed for the rebuild, we'll see what uncle
jack's tranny parts stash includes.

Cheers, Tony Drews
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