Mordy-
You ask about rear axle ratios for the Big TRs.
As I recall there were 6 different ratios made for the TR2-6
diff's, 3.45, 3.7, 4.1, 4.55 and 4.87. The 3.45 was not stock
on any U.S. TR (but was on the TVR Vixen 2500 imported to
the U.S.), but was stock on the injected TR6. The 3.7 was stock
on the TR3-4-6 with a 4 speed trans. The 4.1 was standard on
the same trio but only when fitted with overdrive. The 4.55 was
a very common competition ratio but was only available from
spares, as was the more uncommon 4.87.
You may want to talk to some of the Morgan guys as some of
these ratios may have been more common on their cars.
Hopes this helps
The Car Curmudgeon
Nick
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