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

[John Wagner]

     Steve
The only difference between a machinists and a doctor is, a
machinists washes his hands before he goes to the bathroom.
John Wagner
Just
the wrench



On Monday, November 18, 2013 12:56 PM, Geoff Byrne
<gkbyrne at optushome.com.au> wrote:
 
I've also looked into this and the problem
is holding the hub to accurately
grind it 
Geoff Byrne

-----Original
Message-----
From: fot-bounces at autox.team.net
[mailto:fot-bounces at autox.team.net] On
Behalf Of Jerry Van Vlack
Sent: Sunday,
17 November 2013 1:08 PM
To: Stutzmans; Joe Alexander; Tony Drews
Cc:
fot at autox.team.net
Subject: Re: [Fot] TR-4 / TR-6 tranny layshaft bearing mod?
I think Bruce meant the hardness of the material was too hard to machine, a
good grinding house could manage it. Or someone with the proper tooling.
JVV
-----Original Message-----
From: Stutzmans
Sent: Saturday, November 16, 2013
8:39 PM
To: Joe Alexander ; Tony Drews
Cc: fot at autox.team.net
Subject: Re:
[Fot] TR-4 / TR-6 tranny layshaft bearing mod?

At my request, my machine shop
guy tried to find somebody who could modify
it to take extra bearings. 
Everybody said it was too hard.
Bruce
----- Original Message -----
From: "Joe
Alexander" <n197tr4 at cs.com>
To: "Tony Drews" <tony at tonydrews.com>
Cc:
<fot at autox.team.net>
Sent: Saturday, November 16, 2013 9:54 AM
Subject: Re:
[Fot] TR-4 / TR-6 tranny layshaft bearing mod?


> Ed W.  (FOG1) can be very
helpful.
>
> Sent from my iPad
>
>> On Nov 16, 2013, at 8:46 AM, Tony Drews
<tony at tonydrews.com> wrote:
>>
>> 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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