Changing front and rear diff fluid

[mattferguson14]

I am thinking of servicing the front and rear diffs. And suggestions as far as what fluid/vescosity is best? Also, how much will I need for a complete drain and fill for both diffs?

Thanks!

[Scott Larson]

Front diff, 1.5 quarts Amsoil 80w90 Synthetic Gear Oil. Rear diff, 2.2 quarts Amsoil 80w90 Synthetic Gear Oil plus 7 ounces CRC Trans-X Limited Slip Additive #402508. That's what I run in both of mine...

[Cable Bob]

It's kinda whacked but you have to remove the bottom bolt on the front diff cover to drain; the rear has a drain plug.

[mattferguson14]

Thanks for the advice guys!

[Mile High VX]

Make sure you take the fill side off first...to make sure you can get it off.

Pretty frustrating to drain the diff and then not being able to fill it again...