GM 12-Bolt Rear End Rebuild - Asphault Marker. HOT ROD Staff Writer Jul 01, 2010. ... Not only will we add strength and traction, we'll also change from a 3.08 gear to a 3.73 ratio, ...

Follow along as we show you how to rebuild a Chevy 8.2-inch 10-bolt rearend from a 1971 Monte Carlo using upgraded parts including axles, ring and pinion gears, and a positraction differential.

Check out the installation of a all-new iron casting GM 12 Bolt Axle, 871/48-inch-ring-gears, and much more! Here at Hot Rod Magazine.

We got to work rebuilding our 1978 Chevrolet Camaro Z28's GM 10-bolt rear axle, ... set was a 2.73:1 ratio, ... equals more strength without going to a more expensive 12-bolt axle.

The Bolt is expected to be in at least some dealerships by the end of this year, promising a reasonably practical 200-mile electric range and a price around $30,000 after credits.