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3.45 rear end

To: "'triumphs'" <triumphs@autox.team.net>
Subject: 3.45 rear end
From: "Janssen, Lee K" <lee.k.janssen@lmco.com>
Date: Mon, 22 Feb 1999 05:04:08 -0700
hoops@owt.com wrote:

>Where did you get a 3.45 rearend?  It is my understanding that they were
>offered only on the PI version.  I've often thought about converting to
>a taller rearend ratio for the cruising benefit, since I don't romp and
>stomp my car around town and I don't have OD.

Based on my very limited information the 3.45 rears are available from 2500
saloons (with or without PI) since they ran 14 inch wheels rather than the
15 inch wheels that are on the TR6s. To the best of my knowledge the only
ones imported into the US were attached to TVR 2500s (rare bird indeed).

The 3.45 rear is not a replacement for overdrive. The rpm reduction is only
6.7 percent (1/3 of what overdrive offers) and there is no way to disengage
the unit which is the one great advantage of overdrive.

>In top gear, without overdrive, what is your engine turning at 70mph?
Same rpm as yours times 3.45 / 3.7

> Do city buses beat you from light to light?
Nope... I drive a slow plodding TR6 not a fast TR4 like Brad Kahler!

Hope this helps
Lee Janssen
Sunny Denver CO




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