2104-201845
Gear Mainshaft 2nd and 7th Gear
Mack

This gear mainshaft is a critical component within the transmission system, responsible for transmitting power from the engine to the drivetrain across specific gear ratios. Its precise engineering ensures smooth gear shifts and efficient power transfer, which are vital for optimal vehicle performance. The shaft's robust construction withstands the stresses of heavy-duty operation, including high torque and frequent shifting. Proper functioning of this part is essential for maintaining transmission longevity and preventing costly repairs. Its role in ensuring accurate gear engagement directly impacts driving comfort and operational safety. Source One Parts Center provides this mainshaft as a reliable replacement part to keep your transmission operating at peak efficiency, especially in demanding hauling applications.