Oil types

[Duan]

I have a 2004 jeep wrangler TJ Sport with a manual gearbox and ARB lockers. My question is what type of oil can I use in the diff's (30 Dana front and 44 Dana rear) transfer box and gearbox? I don't do a lot off-road driving. Can someone please help?

 

[Chris]

I have a 2004 jeep wrangler TJ Sport with a manual gearbox and ARB lockers. My question is what type of oil can I use in the diff's (30 Dana front and 44 Dana rear) transfer box and gearbox? I don't do a lot off-road driving. Can someone please help?

Check this out, it lists all the fluids you can use as well as the capacity of each:
Jeep Wrangler TJ Fluid Capacities

 

[Duan]

Thanks Chris.

 

[Chris]

No problem!

 

[Jerry Bransford]

This would be a superb choice for your transmission. https://www.amazon.com/dp/B000CPCBEG/?tag=wranglerorg-20

For your axles, any good quality GL-5 gear lube will be fine, and your ARB lockers are not fussy about the gear lube either. No additives are required for ARB lockers. If you don't tow a trailer, a 75W-90 or 80W-90 GL-5 non-synthetic from Valvoline, Castrol, Mobil, etc. would be an excellent choice. If you tow a trailer, a heavier viscosity like 80W-120 or 75W-140 would be a good choice. The exact viscosity is not actually that important as all of those are closer in viscosity than most would guess.

I recommend a non-synthetic as do most custom axle shaft manufacturers like Currie. It was discovered several years ago to that the gears actually run substantially cooler when lubricated with a conventional gear lube than they do with a synthetic. Currie actually requires the buyers of their custom axles run only conventional gear lubes in them to keep the warranty in effect. True. It doesn't make that much difference in reality as most don't push their axles hard enough for the heat to be a problem but for me, I'll always run a conventional gear lube in my Jeep axles.