Hey guys, so I have a 93 yj and the first U joint my rear driveshaft broke. The whole driveshaft fell out and tons of oil leaked out the back. I am unsure with what oil to replace it with... Is it transmission oil, or is it a different kind of oil. Please help!
The spec fluid depends on who you want to listen too, Jeep/chrysler naturally preferred their fluid and back then it was ATF+2 & +3, New Process simply called for ATF, Chevrolet (NP231C) like chrysler preferred their fluid and back then it was Dex II & III. And if Ford used this case I bet they would've spec'd Mercon. Other fluids people have successfully used are motor oils from 5w-30 to 30W. Since ATF+4 is the current fluid that superceded the older ones, it is a synthetic based ATF, its probably the better fluid to use but not needed.
Dry fill capacity is less than 2 qts, or closer to 1.6 qts. I would go ahead and drain whats left and start with all new fluid.