What kind of fluid in my rear diff

[john93rangerstx]

what should i use in my rear diff i am changing my rear axel seal at school so what fluid should i use it has a 8.8 with l/s thaks

 

[little x]

75w140 gear oil, and I think your supposed to add some type of friction modifier for the ls, but I don't have one/don't know exactly.

 

[my pos mounty]

75W140 synthetic with one bottle of the friction modifier so that your limited slip clutches don't chatter