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Spd # & diff. solusions

To: Kramer <ebk@buffnet.net>, "INTERNET:triumphs@autox.team.net" <triumphs@Autox.Team.Net>
Subject: Spd # & diff. solusions
From: Tony Rhodes <ARhodes@compuserve.com>
Date: Mon, 16 Nov 1998 19:48:49 -0500
Message text written by Kramer
> I've
>mixed up the many spd to the different TR4/A's that I can't rebemer
>which TR4/A gets which spd.<

Well,  I have this info.

Any transmission could have OD retrofitted.  The standard factory fitting
is 3.7 rear
with non-OD transmissions, and 4.1 for OD transmissions (in the TR4 series,
maybe earlier too).
The transmission ratios were always the same from TR2-5/250, or so I am led
to believe.

Then there were 550/590.15  and 165/15 tires which had slightly different
diameters resulting
in 4 possible speedomoter fittings  1184 and something else for the 3.7
differential, and
by my unverified calculation 1312 and another something else for the 4.1.

my guess is that the angle drive had a 1:1 gearing and nothing else,
otherwise they
might have been able to get away with using the same speedo on OD and
non--OD 
transmissions.
-Tony

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