from the 89 FSM:

Rear axle gear oil
Conventional differential
Limited slip differential
Hypoid gear oil API classification GL-5 or higher/SAE viscosity No. 90,8OW 2.6L Engine: 1.80 lit. (3.80 pints)
3.OL Engine: 2.60 lit. (5.49 pints)
MITSUBISHI Genuine Gear Oil Part No. 8149630 EX or equivalent 2.6L Engine: 1.80 lit. (3.80 pints)
3.OL Engine: 2.60 lit. (5.49 plants)

The lsd oil mitsu stuff has an lsd additive.

Not responsible for advice not taken...