All too often, we see truck owners trying to take the route when doing various builds, which ends up costing them thousands more in the long run. One example of this is adding a high quality, bullet proof torque converter, but not changing the input shaft.

The problem with this is that with the new converter that has drastically less slip than a factory converter, that stress is now applied to the input shaft. Unfortunately, the factory cast input shaft does not have the ability to twist without breaking......so it does. On top of this, when an input shaft breaks, it will typically also destroy the torque converter, front pump, and many other transmission internals. This is why we stress that you MUST upgrade the input shaft when upgrading your torque converter, and ATS makes one of the best.

The ATS Billet Input Shaft is the back bone of your Allison transmission. It is the first hard part to bring power into the transmission and transmit that power to the wheels. So, whether you've upgraded your torque converter, tow heavy, run larger tires, have added power, or a blend of ANY of these, you NEED to address your input shaft before catastrophe occurs.