2104-20121041
Transmission Countershaft
Mack

This critical transmission component transmits power from the main shaft to the gear sets, enabling smooth gear changes and efficient power transfer. Its precise dimensions and high-quality materials ensure durability under heavy loads and frequent shifting. Proper functioning of the countershaft is vital for maintaining transmission performance and preventing gear slippage or failure. It is designed to withstand the stresses of heavy-duty operation, contributing to the overall reliability of the drivetrain. Sourced from reputable suppliers, this part is essential for maintaining optimal transmission function. Source One Parts Center offers this component to support your vehicle’s transmission system.