[TR] TR Speedometer

[John Macartney]

I don't think the TR6 in injected or carb form ever had a 4:1 final drive
(or any other oddball ratio) unless the diff and its housing came off a
Triumph 2000 saloon which had this ratio in O/D and non O/D configs. Lower
than normal final drive ratios often appeared on cars for export markets of
developing countries - e.g. a number of African territories, Israel, Turkey,
Malta and Singapore. There is yet another speedo number (though I can't
remember what it was) and this was fitted to cars with Michelin tyres as a
line fit. This tyre make had a slightly different rolling radius to the
Goodyear G800 of the day which was sufficiently 'different' to fit an
alternative clock. They standard fit for all the sidescreen TR's, the 4/4A,
TR250 and TR6 carb up to and including 1971. It might have gone on to later
model years but by that time I was working in other parts of British Leyland
and lost touch with Triumph specs.

Jonmac

-----Original Message-----
From: Triumphs [mailto:triumphs-bounces at autox.team.net] On Behalf Of Dean
Tetterton
Sent: 27 October 2014 21:59
To: Triumph List
Subject: [TR] TR Speedometer

     On the face of the TR speedometer's under the miles numbers, there is a
small number printed. On the TR6 it is usually 1120. Is this the number of
revolutions per mile the cable makes? If this is so the number would
indicate the ratio that the car was built with. If the TR6 in the US is 1120
it would be for a 3.7. Anybody know what a UK TR6 with a 3.45 have or a TR6
with a 4.1?

  Thanks,

     Dean T.

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