posi traction oil

what kind of oil I have to put for my posi tration ?

When I run the car I head in the back of the car zzzzzzzzzzzzz noise ?? like a broken berein wheel or the axle ???

 

scuse me for my english its full of mistake I'm french

 

and when I turn I head a noise in the back to

 

I'm running synthetic gear lube, Mobil 1 brand, plus a posi additive. I think the lube is 75W90 weight. GM posi additive is available at your local GM dealer, or there are other mfgrs that you can find at most parts stores. With a posi rear, you really need the additive, though some synthetics will say they work with posi rears.

 

how to be sure I have a posi traction ?
I have 12 bolt because Is a canadian car

 

lift the rear of the car , both sides off the ground . put the tranny in neutral . now grab one rear wheel & spin it . if the other wheel spins in the same direction , u have a posi . if the wheels spin in the opposite direction , no posi . go to gm & buy the posi lube , if u have a posi .

 

ok thank

 

Ther is a spcial GM additive that you should use.

 

GM numbers

Rear end fluid=#89021671 SAE 80w90
Limited slip additive=#1052358

:TU:


David