What should the tach be on a Chevy truck?
What should the tach be on a Chevy truck? Do not let the tach, (if you have one) go over 2800. and keep your speed on hills down to that tach revs. If you need to on bad hills shift down to the next lower gear and keep your revs to 2800 or below. What kind of transmission does a GMC Manny use? Rugged and Reliable - The Manny Tranny Installed in the GMC MotorHome and TransMode, the Turbo-Hydramatic 425 was an automatic transmission developed and produced by General Motors from 1966 to 1978. The THM425 was originally developed for...