Allison GMax-5 KitOut with the “0's” and in with the 10's, Sun Coast Exclusive, this kit not new to us it’s been in testing for over a year. Now released to aftermarket, for your increased horsepower and your heavy hauling needs.
This kit supercedes our “Stage IV Kits” and is used in our inhouse built GMax transmissions.
Sun Coast engineered this kit and manufactures many key components that have made it possible to hold the torque your Duramax is putting to the ground. We have assembled the best parts available for your Allison 1000 transmission and put it in a kit form to enable shops to build a dependable unit. This kit only upgrades the clutches for C-1, C-2, C-3 and C-4. Note C5's are coming soon. For Clutch only upgrades use kit number GMax-5-1. Kit number GMax-5-2, it comes with hydraulic upgrades.