triumphs
[Top] [All Lists]

Re: TR-4A - 4.28 rear end; what gives?

To: triumphs@autox.team.net
Subject: Re: TR-4A - 4.28 rear end; what gives?
From: Dave Quirt <quirt@sk.sympatico.ca>
Date: Thu, 04 Mar 1999 18:24:04 -0600
John:

I had a TR4 with the optional 4.1 gears right from the factory. 
Definitely an advantage at the stop light. The overdrive was needed for
highway use though.

Dave Q.

>From John Cowan: 
I measured the ratio of the differential on my '66 solid axle TR-4A
several times and it fell between 4.26 and 4.28 to 1.  This result was
unexptected, but is borne out by the fact that the car revs up and tops
out especially quickly.  I've heard rumor of a special 4.3 to 1 rear
end, which if accurate could explain what I have (the disrepancy being
experimental error, although I was pretty careful).
Is there a 4.27 or 4.3 to 1 differential available?  If so, it would
seem suitable for Autocross.  Would it also be suitable for road
racing?<

<Prev in Thread] Current Thread [Next in Thread>