Rear tires skipping in tight turn since new

[S4Vince]

rear differential cover install this weekend.

I installed a MAC aluminum carrier unit cover (one of the sweet looking thick aluminum ones) and the rear wheels kind of skip, lock, go, lock, go when making a real sharp turn slowly. Did I screw something up? The cover has the two rods that you tighten to hold the bearings firm although I torqued them to spec. What going on here?

 

[4C FED]

Did you put any limited slip additive in when you refilled the diff?
If not, you need to.

 

[S4Vince]

Good call on the limited slip additive although I didn't think this was required with the Amsoil 80-90 weight synthetic lube.

How much of this additive shall I add to the 2.5 quarts of gearlube?

Thanks!!

 

[4C FED]

I would say it depends on the brand used.
You can get it from GM. Redline & Lubeguard also make such additives.

 

[Loeryder]

That or you have too much preload on the bearings.

Recheck the preload bolts on that cover and maybe back them off a few lb/ft and see if that makes a diff...