The GM 9-1/2" semi-float rear axle was introduced in 1981 for 3/4 ton trucks as a lower cost replacement for the full floating 10-1/2" 14 Bolt axle used on 1973-1980 3/4 ton models. Starting in 1988, the 9-1/2" axle is also used on 1/2 ton heavy-duty models. The GM and AAM 9-1/2" axles are the same. The name difference is due to GM selling it's axle group to a group of investors who named the new company American Axle Manufacturing. The 9-12" axle design has remained pretty much unchanged over the years with the exception of seal changes and brakes.
QU30373U Used Rear Brake Plate for 1984-2000 Chevy and GMC 3/4 ton trucks with 9.5" semi-float rear axles and 13" x 2.5" brakes. More Info
QU30371U Used 33 Spline Limited Slip Rear Differential Assembly for 1981-up GM/AAM 9.5" semi-float rear axles. More Info
If you only need a bearing or two for your 1981-up AAM or GM 9-1/2" semi-float rear axle, we stock the best: Timken®. For the amount of work it takes to change most axle bearings, the extra cost for a Timken® diff or pinion bearing is a small price to pay for better steel, more uniform surface finish, and accurate, precision ground races
GM/AAM 9-1/2" semi-float rear axles are typically found in 3/4 ton and heavy-duty 1/2 ton trucks. A rear axle rebearing job is a preventive maintenance service that should usually be performed on Chevy or GMC trucks with 150, 000 to 200, 000 miles on the odometer to prevent catastrophic bearing related failures. Our Differential Bearing and Seal Kits include Timken® Differential and Pinion Bearings plus genuine original equipment American Axle Manufacturing (AAM) small parts needed to perform that all important front axle rebearing service
The AAM/GM 9-1/2" 14 Bolt Rear Axle had a design change related to the pinion yoke and pinion seal in 1997. If you have a 1997 truck, always verify if your pinion yoke has the new design combination wear sleeve and slinger or the old style conventional stamped steel pinion slinger
QU30370U Used 3.73 Ratio Ring and Pinion Set for 1982-current GM/AAM 9.5" semi-float rear axles 11-41 tooth count. More Info
Please refer to QU50858 page for more details and ordering information.
QU50723 Differential Pinion Cross Shaft for AAM and GM 9-1/2" 14 bolt rear axles with open differentials. This is a genuine Original Equipment AAM replacement part. More Info
Please refer to QU11032 page for more details and ordering information.
QK8031 Rear Wheel Bearing Kit for 2007 and up GM 9.5" 14 bolt rear axles.
Link to QK8031 Catalog Page