Allison 1000 Billet Planets

The stock planetary gears deep inside your Duramax truck's Allison transmission are not an uncommon point of failure on HD Silverado and HD Sierra builds that are churning out some serious levels of horsepower and torque, and if that happens, your tough truck is going to be dead on the side of the road. Upgraded Allison billet planets are built from the ground up to handle the strain of big-power Duramax builds, hard launches at the track, extremely heavy towing, and tough off-roading without letting you down. These billet planets feature CNC-machined billet steel components that are far stronger than the cast steel planets, allowing them to handle higher levels of load and shock force without fracturing. Make sure you also check out our Allison Billet Clutch Hubs and our Allison Modified Sun Gears!