Jeep transfer cases have a round red and silver identification tag on the back side. It will show the part number, gear ratio, date code and other information. Common Jeep transfer cases are 209, 231, 242. Look for a three digit number that may or may not be preceded by or followed by some additional letters like NV, NP, or J.
Transmission: a 3 speed Chrysler 727 Torqueflite automatic Transfer Case: New Process model 229 (NP229) (this is assuming it has the AMC 360ci V8)
may need new transfer case or transfer case controller
I have a 229 A in my Grand Wagonner fron -84 (with 360 engine)
T-Case is most likely an NP229
its the borg warner 1350
If the shift lever on the floor won't move to engage there is most likely a linkage problem. If the linkage seems to move and you shift the lever under the dash from 2wd to 4wd and the transfer case does not engage look for a vacuum problem. the lines can be very brittle and break easily. There is a vacuum motor on the transfer case that must work in order to engage the 4wd. if all of these seem to work then the problem is likely to be internal.
If you are talking about the transfer case on the transmission....it would be any brand of 90 weight oil.
Fill plug is located on the center rear of the transfer case
22
Transfer case gets ATF (auto trans fluid) Axles get 75w90 or 80w90 gear oil.
what is the transmission capacity for a 1988 700r4 with transfer case
a transfer case is found in 4 wheel drive vehicles it transfers power to the front differential. It is mounted to the rear of the transmission.