On Thu, 27 Aug 1998 KTRIUMPH@aol.com wrote:
> Jordan
> There is no "overdrive" speedo unit. An OD doesn't change the rpm of the
> output shaft in relation to the rear wheels. Same speedo.
True, but the standard diff ratio for OD TR4s is 4.1:1 as opposed to 3.7:1
for non OD cars. That requires a different speedo calibration, resulting
in what most people call "OD Speedometers" and "non-OD Speedometers".
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Chip Old 1948 M.G. TC TC6710 NEMGTR #2271
Cub Hill, Maryland 1962 Triumph TR4 CT3154LO
fold@bcpl.net
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