[TR] TR3A SPEEDOMETER

[Randall]

---- Thomas Geoghan <stgeoghan at yahoo.com> wrote: 
> Is there a way to tell if the speedometer is compatible with
> overdrive?

Should be no difference.  The speedo calibration number changed for cars with 4.1 final drive, but contrary to many sources, the vast majority of cars with overdrive still had 3.7 gears (so the same speedo head as non-OD cars).

And even if the calibration number is wrong for your tires & final drive, it would only show up as a proportional error.  The unit would still return to 0 and rise above 60.

> Is repair a DIY?

Depends on how bad the internal damage is; and how adept you are at working with tiny gears and springs.  Tony Rhodes wrote a good article on the process, which you can download from
http://home.comcast.net/~rhodes/1967_TR4A_Tech.html

Randall