The main shaft of a transmission is also known as what?

The main shaft of a transmission is commonly referred to as the input shaft. This component serves as the primary connection point for the power generated by the engine, allowing it to enter the transmission system. The input shaft transmits this power to the various gear sets within the transmission, enabling the vehicle to shift gears and control speed and torque.

In a manual transmission, the input shaft is critical because it engages with other shafts, such as the counter or output shaft, during the gear shifting process. Its design is such that it can withstand the high torque levels that are transmitted from the engine. The terminology used, including ‘input shaft,’ helps categorize its function in the transmission system—acting as the entry point for engine power.