Allison 1000 Upgraded Sun Gears

While the sun gear deep inside your Duramax truck's Allison 1000 transmission doesn't tend to fail, even on trucks pushing out a lot of power or getting launched hard, both the planets and the clutch hubs can have problems, and most aftermarket billet clutch hubs and upgraded planets require modifications to the sun gear. Tier One's selection of Allison 1000 modified sun gears are all ready and set to work with strong billet clutch hubs and modified Allison planets so that you can really prep your Duramax build for huge power. These modified Allison sun gears are all precisely machined for a perfect fit with performance clutch hubs and planets. Make sure you also check out our Allison Billet Clutch Hubs or our Allison Planet Upgrades!