Join Date: Dec 2001
Location: Belleville, Illinois
Thanked 22 Times in 17 Posts
Re: Superior Axle Kit
They mean a limited slip differential. The only sure way to check is to remove the cover and look in. If 4 spider gears are visible it's an open diff. The limited slip has what looks like a drum that hides the spiders.
There should also be a tag hanging on one of the cover bolts, but it may be missing, and I don't know what code it will have to designate LS.
You need to know that any time you change the gear lube. A limited slip diff needs a friction modifier added to the gear lube. Without it the clutches will slip and quickly wear out. If they're already worn out it doesn't matter.