Using an electronic speedo with TBI and 700R4?

[raycow]

Originally Posted by mcbassin

Is there any way to tell from the vin# what axle gears it has?
Vin: 1GCDC14HXGF432259

Finding out what axle ratio you have is the easiest part of the whole job.

Put matching marks on the pinion yoke and differential housing. Jack one rear wheel off the ground, put the transmission in neutral, and the parking brake off. Turn the wheel exactly TWO revolutions and count how many times the driveshaft turns, estimating any fractional turn as closely as possible. That number is your axle ratio.

If the wheel is difficult or impossible to turn, you may have posi. In that case, jack both rear wheels off the ground and turn either of them only ONE revolution. Count the driveshaft turns the same way as for an open rear.

Ray