Allison Transmission Parts

The Allison 1000 transmission is built for power, towing, and longevity—and our Allison 1000 Transmission Parts Collection is built to keep it that way. Designed for heavy-duty GM and Duramax diesel trucks, this lineup includes everything needed for complete rebuilds, upgrades, and repairs, featuring overhaul kits, friction clutches, steels, solenoids, valve body components, filters, seals, and gaskets precision-engineered for long-lasting performance.

Whether you’re maintaining a workhorse or building for power, we carry both OEM-quality replacements and heavy-duty performance upgrades capable of handling extreme torque and heat. From Raybestos GPZ clutches and Sonnax billet shafts to TransGo shift kits and high-capacity valve body components, every part is tested and trusted by professional rebuilders.

Ideal for Chevrolet Silverado HD, GMC Sierra HD, and other Allison-equipped vehicles, our components deliver improved durability, smoother shifting, and extended service life under demanding load conditions.

Call us

shift Kits

Valve Body Correction Kits are engineered to restore hydraulic integrity and performance. Whether you're looking to maintain optimal shifting quality or achieve race-level performance, our shift kits have you covered.

Shop Now

Electrical components

BNB Electrical components are OE replacement parts. Our electrical line includes solenoids, wiring harnesses, sensors, and complete solenoid assemblies. Check out our electrical replacement parts today. 

Shop Now

heavy duty parts

BNB heavy duty parts are upgraded parts that increase the longevity of your performance build. Whether you are looking to increase towing capacity or torque, check out our HD parts collection. 

Shop Now

filters

Replacing your transmission filter is critical for prevention of damage

Click below to find the correct filter for your transmission

check out Filters

Don't forget to replace your pan gasket with transmission service

Looking to have a custom heavy duty rebuild?

Call the Gears specialists for an estimate

Call us

Have questions about parts?

Call the Gears parts experts

Call us