diff fluid
 

Wondering what every one is runnin for there diff fluid, anything special or just some std. 80-90

AMSOIL Severe Gear 75W-90. I havent switched to synthetic yet but they do have a synthetic blend too if you are interested in running that.

Supertech 75w-90 syn blend

You want syn in the diffs.

yeah Ive been debating on what to put in, i have 5 gallons of this castrol 80-90 thats been sitting in the garage for months now id love to put it to some use!..

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So I should say, Do you guys think it would be ok if I ran this castrol 80-90 with some diff additive?

The castrol will be fine but the amsoil is a lot better

Ive always just ran regular old 80w90 with no problems.... BUT like everyone has said synthetic would work better!

The Castrol should be fine, add some limited slip additive if applicable. Personally I run 50/50 Mobil synthetic 75w90/Lucas oil stabilizer, but that's just me.

Thanks for all the input guys!! i threw some of the castrol 80-90 in last night with some additive, i have so much kickin around i fig id save them pennys for something else!