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Re: [Fot] TR4/6 Transmission, Catastrophic failure

To: Dean Tetterton <tr3a58@verizon.net> s=q20140121; t=1415137056; bh=n/2+yQpnUTprLrI6/d5JCUKd0KCsmPb2Nwih8LDiKxQ=; h=Received:Received:Mime-Version:Content-Type:Message-Id:From: Subject:Date:To; b=kzDeTLfydvCiLNdXYlkAjNCCv+Fol7Kf/nZKj0/mxcgJfcQQbOn1qMhEpkFmlyUg7 KaNjleR4UjFMggB082srcz24rS3aWrQ5ra67AcaYz0DppHdWC1L1uHTwQMal0NzXxm lnYA8se7zGcJKb0Po4fw/FL5WEBHKNYOZvxQ7k5Lonf1jv2Eh6BpE0kJ1Co9D/ReEo zM7k0+5F7Y/k/I8kYTYWNQCmyYYV1JnBf/wpbM+kNArD3no1tj7g83wsQ21vWxURXz LHWh5tQ12q+QpDkFa1lA0tX2U3V/2w1kqfd2LtnwFTohIqjeXpcwlpXLr1pIak+s26 lTxFcxIcVKjCw==
Subject: Re: [Fot] TR4/6 Transmission, Catastrophic failure
From: Brian Garcia <cudapilot@comcast.net>
Date: Tue, 4 Nov 2014 15:37:20 -0600
Cc: 'Friends of Triumph' Triumph <fot@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: fot@autox.team.net
References: <0E2FA952-9DDA-43B2-B723-87447E67B00E@me.com> <B4DC8FDE-5AB7-4A9F-A8BB-58D898B9E32D@verizon.net>
Concur - I had this happen in two laps at Road America with a Muncie -
aftermarket gear didn't have proper clearance and the result was a friction
weld to the shaft.

Brian Garcia
Friendly Ghost Racing

> On Nov 4, 2014, at 3:25 PM, Dean Tetterton <tr3a58@verizon.net> wrote:
>
>      I would say that there was not enough clearance in the 2nd gear
bushing
> and the
> 2nd gear play. I have gotten new 2nd gear bushings that are too tight
> on the shaft. I have opened them up with a brake cylinder hone. The oil
> needs clearance to get in. They should turn freely when installed on the
> shaft.
>
>
> Dean T.
>
>
>> On Nov 4, 2014, at 1:28 PM, Scott Janzen wrote:
>>
>> I had a freshly rebuilt transmission with mostly new parts, including a
new
>> close ratio gear set, fail spectacularly after only a few laps of use.
> Second
>> gear "welded" itself onto the main shaft, with the result that the gearbox
> was
>> effectively in two gears at the same time (car was under power in third
> gear)
>> and all of the teeth were stripped off of the 2nd gear set.
>>
>> The gearbox was filled with fresh Redline MTL (75-90)  - it was still
> filled
>> well above the side fill plug when I took the top off the box.  What could
>> cause this failure - chalk it up to a defective bushing?  The bushing was
>> steel (?), not the bronze variety.
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