A transmission is a machine in a power transmission system, which provides controlled application of the power. Often the term transmission refers simply to the gearbox that uses gears and gear trains to provide speed and torque conversions from a rotating power source to another device.
Transmissions play a critical role in your car’s ability to operate. In layman’s terms, they carry the engine’s power to the drive axle by using different gears, which allows the engine to rotate at various speeds.
Transmission Repair Includes :
removing the transmission fill/drain plug to remove the old automatic transmission fluid
reinstalling transmission fill/drain plug
refilling the transmission with new automatic transmission fluid to the proper level