what weight oil is best for diffs & x-fer case?

[JRowe]

I'll be replacing the gear lube in my differentials and trasfer case soon. I know there are different weights of oils that can be used. What are the best weights to use for each? (I live in California, so it doesn't get too cold.)

[Mike Hippert]

90 WT unless you use Mobile One then your only choice is 75 which is still good. I use regular dino oil in the diffs as I have too change it allot due to water and mud. But I put Mobile One in the T-case.

[JRowe]

mobil 1 makes both 75w-90 and 75w-140. Is one bertter than the other?

[Mike Hippert]

I have only seen the 75w-90, I have never seen or used the 140.

Check this out

http://www.robisonservice.com/servicedep/rover_tips.asp

[rover4x4]

I use the mobil one hiowever i only have about 500 miles on it.

[javelinadave]

AMSOIL 75-90. What else would I use, I sell the stuff!