[motrmed]

Does anyone know the formula for figuring the diferential ratio without removing the cover? I seem to remember something about jacking up the rear of the car and spinning the wheel while watching a mark you make on the driveshaft but I can't remember how it goes. Thanks-Glenn

 

[chevman57]

Glenn put a mark on the drive shaft and one on the tire. It is one full turn and count how many turns of the driveshaft. That should tell you pretty close the ratio.
Terry