fastazzls1

hi guys i have a bone stock 2000 ws6 trans am with a 10 bolt 3.42s with rpo code G80 i am changing diff fluid tomorrow and have bought all the parts when i went to gm i bought the gasket and fluid and friction modifier additive for limited slip my question is the owners manual recomended synthetic gear lube and the guy at the parts counter said not run synthetic, even though the owners manual for the car says to run synthetic wht do you guys think

Also what is the torque on the diff cover bolts thanks

RPM WS6

iTrader: (3)

For a '99+ torsen limited slip, GM recommends a 75w90 synthetic lube, GM part #12378261.

For a '98 with the auburn limited slip, GM recommends an 80w90 conventional lube, GM part #89021669.

These are the fluids I would use and have used for those respective years, plus the GM LSD additive.

fastazzls1

thanks for clearing that up i bought everything from gm but parts guy was trying to argue with the facts

RPM WS6

iTrader: (3)

Oh, you also asked for torque specs.... 22lb/ft is the GM listing, but I have never used a torque wrench on this before though.

fastazzls1

ok thanks again do you use rtv with new gasket i have been told yes and no just wondering

joecar

If the gasket mating surfaces are clean (no old gasket stuck on) and un-damaged, then RTV is not needed.

msydow

i dont use a gasket period. only RTV. never had one leak from the cover.

RPM WS6

iTrader: (3)

I have used high tack gasket sealant, but never RTV. If I remember correctly, they used a double gasket from the factory (or at least that's how my '98 was, and I'm 100% sure that was original).

01ssreda4

iTrader: (96)

No friction modifier needed, you do not have a clutch posi....you have an all gear driven posi.