Q: I am in the process of upgrading a vintage Chevrolet Chevy II SS.

The car is equipped with an 8.2-inch, 10-bolt rear-end with 28-spline axles and a 3.08 ring and pinion set. I am going to re-use the original ring and pinion but plan to replace the factory open differential. What can you tell me about Eaton’s performance diff?

chevy 2 nova hot rod custom
(Image/OnAllCylinders – Will Schertz)

A: We couldn’t recommend a better performance differential.

Eaton’s Posi Performance diff features carbon friction discs and precision-forged gears to give you great traction in any condition.

Moser Engineering’s replacement C-clip axles are an excellent option and will give you the performance you’re looking for.

Reusing the OE ring and pinion is a bad idea.

We highly recommend replacing the original gear set with Richmond Gear’s high quality replacement 3.08 ring and pinion set.

Additionally, the rest of the components should be replaced too. Ratech’s complete ring and pinion installation kit features all of the accessories you’ll need to rebuild your axle to better-than-new condition. These parts include new pinion bearings, pinion shims, carrier bearings, carrier ships, a crush sleeve, a pinion seal and nut, ring gear bolts, and a cover gasket.

The last thing you’ll need is some gear lube. Lucas Oil’s Heavy Duty Plus Gear Oil is a 80W90 oil that would be a fine choice.