just found the answer it is mopar frictionmodifier additive
75w140 synthetic with limited slip additive.
4 ounces.
80w90, does not need to be synthetic. If limited slip it will require friction modifier additive.
If the front axle is locking then yes. ie; limited slip
Synthetic 75-90 for daily driving. If you offroad or tow a lot then use 7-140. The rear differential may have a limited slip, if this is true then you need to add a special additive : Mopar number 04318060AB
It was an option, not standard equipment.
It was an option available from the factory.
After the Jeep is warmed up, if the creaking noise is noticable during turns at low speeds, then its probably the rear differential. Go to the dealer and have it serviced. All they do is replace the fluid and seal but they use a special lubricant additive.
They can come either with the limited slip or a open differential. If you cant find any of the original paper work there are two ways to find out. One is to take the VIN number to a dealer and ask them if it does. Another way is to place one rear wheel in a way so that it doesnt have any traction at all. If it has an open differential it will just spin and the Jeep will not move forward. The limited slip will give some traction to the other wheel and Jeep will creep forward. Good Luck.
Mt jeep wrangler has a dana 35 differential in it
I don't know about the jeep, but for the Viper the capacity is 1.44 quarts. The Vipers require synthetic oil Mopar part number 4874469 at $29.34 per quart and limited slip additive Mopar part number 4318060AB at $9.63.