gas tach conversion/cluster swap

[Otis2]

Thanks, Jake.  I'll have another look for a trim pot on the '85 tach itself.

As for wiring in a new trim pot (if there's no factory adjustment screw on the tach), then I take it I can just cut into the W signal wire anywhere between the alternator and tach, and solder it in series between them?  

I don't suppose you can recommend a specific precision trim pot with the correct range of resistance values?  (Or at least you might know what the "correct range" is so I can ask for it at the Radio Shack!)

[type53b_gtd]

Thanks, Jake.  I'll have another look for a trim pot on the '85 tach itself.

The trim pot for the A2 tdiesel tach is accessable by removing the tach's rear housing - there are two or three short screws that must be removed on the rear of the tach, then it should lift out of the rear housing exposing the printed circuit and the pot.

Drew