Recommended differential fluid for TJ?

[underdog]

I need to replace my rear pinion seal and was wondering what type of differential fluid would be best to refill when I’m done.
thanks

 

[JMT]

If you pull a trailer, a heavier 85w-140.

Otherwise, 85w-90.

Use conventional gear oil

 

[Leinhit]

If you pull a trailer, a heavier 85w-140.

Otherwise, 85w-90.

Use conventional gear oil

What about the front diff?

 

[Mr. Bills]

What about the front diff?

Conventional (non-synthetic) 85w-90 in the front.

 

[Mumblewood]

I use convention 85-90 both ends also, I check often and replace 1-2 times yearly.

 

[GASnBRASS]

Conventional gear oil. Synthetic is actually a poor heat carrier so while the diff cover might feel cooler the gears themselves will run hotter.

 

[chino1969]

I am using conventional 85W-90 front & rear. Recently re-geared with G2 gears along with a Tru Trac limited slip in the rear. Will never run synthetic in these diffs..