Jag is Salisbury made by Dana. They have steel clutches if they are limited slip. If not limited slip, any good 90 Weight hypoid gear
oil will work. If they are limited slip, the
oil needs the limited slip additive. Either buy the
oil with the additive already in it or buy a small bottle and add as directed.
BTW Don't try to mix and match Dana and Salisbury parts. Put them side by side and you'll quickly see why. That said, you can put in all Dana parts and they will fit. Hunting up the right bearings is a pain, but it can be done. It's a lot cheaper than trying to chase down Salisbury parts and pay through the nose for them. Also, Dana has a lot more gear ratios to offer. Want 3.77's like original S/C's? Probably can't find Salisbury's, but you can get Dana 3.73's from any parts house in America.