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Re: [TR] TR4 Slave Cylinder Stay Rod

To: "'Triumph Mailing List'" <triumphs@autox.team.net>
Subject: Re: [TR] TR4 Slave Cylinder Stay Rod
From: "Glenn Owen" <mgowen55@hotmail.com>
Date: Wed, 17 Jun 2009 17:41:28 -0400
Thanks for all the replies. FWIW, the Moss catalog shows a stay rod fitted 
to all TR's through the 4A (with a design change at TR3: TS13046).
That's a good point about the flange thickness. Next time I have it on 
jackstands, I will check.
Glenn

67 TR4A CTC76829LO



> I had the misfortune to operate a TR3 Transmission without that stay rod 
> for
> some amount of time and finally the bell housing cracked for about 12 
> inches all
> the way around the curve of the bell housing and ruining the transmission!
>
> I believe that the use of this stay rod brace was eliminated on later
> transmissions. If you measure the thickness of the bell housing flange 
> that
> bolts to the engine, it is about 3/8 of an inch thick on the early 
> transmissions
> but close to 1/2 inch or more on the later transmissions! Much stronger! I 
> don't
> know when this change occurred, but my guess is it changed when the gear 
> box
> went to a synchro 1st gear.
>
> My TR250 does not have a stay rod however, I can't speak with any 
> authority
> about the TR4. But if you measure the thickness of that flange and it is 
> ~1/2
> inch you are pretty safe!
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