I bought a set of used 3.73 gears for my car. The gears have all the original bearings, side shims, pinion bearings, crush washer, pinion races, and reused bearings. So the only thing I need is a pinion seal to complete the install or will I need anything else. The gears are out of a 86 Monte Carlo SS.

Also where can I get just a pinion seal and how much do they run?

Thanks for the help.