GM 10.5-inch 14-bolt differential

The GM 10.5" 14-bolt differential stands as a robust drivetrain component extensively featured in Chevrolet and GMC trucks, SUVs, and vans from 1973 onward, including specific versions of the Cadillac Escalade.

[1] Introduced in 1973, this differential employs a full-floating design, boasting a substantial ring gear diameter measuring 10.5 inches (270 mm).

This iteration featured brake drums secured by wheel studs and utilized a smaller diameter pinion bearing compared to the subsequent design.

Enthusiasts often opt to convert this section of the axle assembly to disc brakes for enhanced performance and reduced maintenance costs.

This increased strength allows Jeep Wrangler owners to mount up to 44" tires with sticky compound without concern about axle shaft breakage.

[8] Many Wrangler owners will have up to two inches removed from the bottom of the 10.5" 14-bolt differential housing to maximize ground clearance.

The 11.5 AAM 14-bolt rear differential started replacing the 10.5" 14-bolt in Chevrolet Silverado and GMC Sierra trucks from the 2001 model year onwards.

However, the 10.5" 14-bolt axle remains in production today, specifically utilized in GMC Savana and Chevrolet Express vans.