Recommended lubricants (from the service manuals)
Manual transaxle and transfer case:
Hypoid Gear Oil, SAE 75W-90 or 75W-85W conforming to API classification GL-4
Rear differential:
Hypoid Gear Oil API classification GL-5 or higher
Above -23ºC (-10ºF) SAE 90, 85W-90, 80W-90
From -34ºC (-30ºF) to -23ºC (-10ºF) SAE 80W, 80W-90
Below -34ºC (-30ºF) SAE 75W