In a message dated 3/18/2004 3:39:49 PM Eastern Standard Time,
docnugent@yahoo.com writes:
> I have a Spit Mk IV (FK series, year unknown) parts
> car with overdrive - should it have a 3.89:1 rear end
> like some of the non-overdrive Mk IV's do, or a 4.11:1
> like other non-overdrive Mk IV's do, or something
> else?
AFAIK, all MkIV US-spec Spitfires for 1971 had the 3.89:1 diff, as did all
US-spec 1500s from 1973 on. The 1972 US-spec Spitfire MkIV had a 4.11:1 diff
regardless.
Unlike some GT6 and TR models, the diff. ratio did not change with the
addition of OD to a Spitfire at the factory.
BTW, the serial number of the diff. will indicate the original ratio (which
could have been changed, of course).
--Andy Mace
*Mrs Irrelevant: Oh, is it a jet?
*Man: Well, no ... It's not so much of a jet, it's more your, er,
Triumph Herald engine with wings.
-- Cut-price Airlines Sketch, Monty Python's Flying Circus (22)
|