yo guys, what weight gear lube goes in the differentials in a 2000 yukon denali


any help is appreciated

 

front sae 80w-90 gl-5 (gm p/n 1052271)
rear sae 75w-90 synthetic (gm p/n 12378261)

 

with my Eaton i use 85/140

 

thanks for the replys.

does it matter if it is not limited slip. my buddy who is a tech at work just bought one and he spun the tires and the rear wheels went in opposite directions. so that means there is no limited slip.

same lubes as listed already ??

thanks

 

so then there is no need for the posi additive ??

just want to make sure

 

If you have posi you need the additive.
If you dont have posi no need to use, but make sure and get the RPO code.