Service Rearend and Trans

GMCWAYNE

I'd like to change fluids in these. I found both plugs for the trans and only the drain so far on the differential.

My owners manual says 80-90 WT for the upper trans but doesn't list the capacity. The book says 22oz of SAE 30 WT for the rear. This doesn't seem right to me that the thicker oil would be in the trans.

I'd like to just buy a couple quarts of mobil1 75w90 synthetic to do both.
Does this sound ok? What are you guys using?

Thanks, Wayne

1996 Club Car DS
older ccw FE290
Separate Trans and Differential
Everything Stock for the time being

GMCWAYNE

Nobody has an opinion or advice on this? Would it be a bad idea to run 75w90 in the rear end?

mikesmotortoys

We use 80-90 in all rear ends. There should be a plug (bolt) that comes out to act as a fill level. Just add the fluid until it runs out of the upper plug - not the fill hole, but the fill line plug.