View Single Post
Old 08-09-2010, 01:38 PM   #30
mcbassin
Still Learning
 
mcbassin's Avatar
 
Join Date: Jul 2009
Location: Central Oklahoma
Posts: 10,108
Re: Using an electronic speedo with TBI and 700R4?

Quote:
Originally Posted by raycow View Post
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
I assume I have to turn it 2 turns because it is a non-posi diff?
mcbassin is offline   Reply With Quote