Allison 1000 Billet Output Shafts

The stock output shaft on your Duramax's Allison transmission may be able to handle most applications and a good amount of power without letting you down, but if you're building an immensely powerful HD Silverado or Sierra that's going to be rocketing down the track, tearing it up off-road, or doing some hyper-aggressive street driving, the stock cast steel input shaft can fail and leave your truck stranded, if not also damage your Duramax truck's transfer case. Tier One's Allison billet output shafts can handle much more power and tougher applications than the stock cast steel outputs, allowing you to put together a Duramax diesel build that can fly down the track or rocket around off-road without the output shaft letting you down. Make sure you also check out our Allison Billet Intermediate Shafts or our Allison Upgraded Sun Gears!