[MTGunNut]

what do use use, front and back? I am using open differentials (stock) but dont know what to put in.

[Burnerman]

Gear oil....If you're new to the Jeep world get a repair manual and read the FAQ thread that this quote comes from..

What fluids do I use in my Jeep?
Axles - Gear oil - 80 weight for light duty and normally cooler climates - 90w120 weight for heavy duty and normally warmer climates Note: Some rear axles are equiped with factory posi - a limited slip additive must be put in with the gear oil to extend and protect the limited slip action
Engine - 10w30 for good general usage in most climates - 5w30 for those colder climates (when temps are below freezing for extended periods of time)
Transmission (standard) - 80 weight gear oil
Transmission (automatic) - Automatic Transmission Fluid (ATF) Dexron III
Transfer case - Automatic Transmission Fluid (ATF) Dexron III

[Tom95YJ]

Originally Posted by MTGunNut

what do use use, front and back? I am using open differentials (stock) but dont know what to put in.

You need to be more clear on what you are doing so we know what to put in

I can think of a few things you could possiably want to put in like a Carrier for an open diff, A Full locker , Lunchbox locker , center pin , bearings, ring/pinnion, spacers, thrust washers, spider gears, diff fluid......... you should get my point by now

[Skeezer]

75-90W Gear Oil

I used Mobil 1 Synthetic

[Bob_R]

Originally Posted by MTGunNut

what do use use, front and back? I am using open differentials (stock) but dont know what to put in.

Are you asking about gear oil or what type of gears?

[MTGunNut]

Oh geez, Im sorry though, but I was talking about gears themselves.

[bobbert350]

so do u need to rebuild them i mean the gears? or do u want to no what ur gears are? or what gears you should get?? please be more specific