What diff fluid for 10 bolt with Auburn posi?

[K5Steve]

Sorry for the stupid question but I need to replace my cover gasket and wanted to know which weight of fluid to put in.I have valvline 80 90 in the garage.

 

[xtrmjoe]

That should be fine just make sure it is for limited slips or get some limited slip addidive at any auto parts store. I think auburn is one ounce per quart of flid if I recall correctly.

 

[83ZZ502_Jimmy]

From their website....

NOTE:

TheAuburn Gear limited-slip differential design has been extensively tested with high quality non-synthetic 80W90 hypoid oils treated with GM or Ford friction additives (3 oz. of additive will treat 1 quart of oil). To avoid differential clutch chatter (noise) and for optimum performance, use the oil and additive described above. Use of other additive and oil types may cause differential clutch chatter.

Ford Part Number: C8A219B546A
GM Part Number: 1052358

John