> The other thing I noticed about the OD is the switches on the
> shifter allow the transmission to go into OD in 2nd, 3rd, and
> 4th. I thought only J-type overdrives switched in the 3 top
> gears. The tag on the OD doesn't say A or J. It just says
> Laycock De Normanville: Serial # 22/61753/003197,
That's an A-type, the later variant with the smaller accumulator as fitted to
TR4A IRS and (some) later cars.
It should be enabled in 2nd, 3rd & 4th. Some early TR2 A-types only worked in
4th gear, but most were 2,3,4.
J-types normally only work in 3rd & 4th (unless modified of course).
Someone mentioned D-type; those were not used on the 'big' TRs. Only early
Spitfire and GT6, AFAIK (although there might be some
others). The D-type is smaller and weaker, marginal even behind the 2.0 6
banger.
-- Randall
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