The Eaton Fuller Countershaft Auxiliary Assembly, part number A-4127 or A4127, is a genuine Eaton Fuller transmission component designed for the auxiliary section of Fuller heavy-duty truck transmissions. The countershaft assembly supports the auxiliary gear train, transmitting torque through the back section of the transmission. This is a direct Eaton Fuller part, sourced and sold by Pro Gear and Transmission. Application and fitment vary by transmission model and configuration. Call us to confirm this is the correct assembly for your specific transmission before ordering.
Features
Genuine Eaton Fuller part number A-4127 or A4127
Countershaft assembly for the auxiliary section of Fuller heavy-duty transmissions
Supports auxiliary gear train torque transmission
Direct replacement component for the Fuller auxiliary countershaft
Sold by Pro Gear and Transmission
