Rearend questions

[69nova]

If you put the rear of the truck on jack stands and turn a wheel and the wheels turn in the same direction then you have limited slip and you will need the additive. They turn in opposite direction if open differential. Also if you turn the wheel one complete rotation and count the number of times the driveshaft rear yoke turns then that will be your ratio. (3 3/4 turns = 3.73 etc.) There is a catch to this if you have a non limited slip rear though. You need to have one tire stationary and the count will be half so rotate tire two rotations.

It can be a pain to pull the rear cover and refill with oil if you dont have too!

[Jacfourteen]

Originally Posted by 69nova

If you put the rear of the truck on jack stands and turn a wheel and the wheels turn in the same direction then you have limited slip and you will need the additive. They turn in opposite direction if open differential. Also if you turn the wheel one complete rotation and count the number of times the driveshaft rear yoke turns then that will be your ratio. (3 1/4 turns = 3.73 etc.) There is a catch to this if you have a non limited slip rear though. You need to have one tire stationary and the count will be double. (6 1/2 divided by 2 = 3 1/4 = 3.73)

It can be a pain to pull the rear cover and refill with oil if you dont have too!

This is a good way to get an idea for the ratio. One small note though, it would be 3 3/4 turns equals 3.73, not 3 1/4.