[TR] Tr2/3 rear-end ratios

[Randall]

> Don't 
> recall the number for the 3.45 ratio offhand, but I think 
> it's 38 (11 tooth pinion).

Oops, forgot to mention that AFAIK the 3.45 gears were never originally
fitted to the TR2-4A.  However, the 3.45 gearsets from the PI TR5-6 (and
various other Triumphs) will fit, so might be found in a TR3/A axle.  I was
planning on doing that myself, before the car got wrecked, to make up for
the short tires I used.

Randall