Manual transmissions allow drivers to shift between gears manually while simultaneously regulating power and speed. Manual transmissions have a clutch, flywheel, gear selector fork, collars, gears, and shafts. A shaft supplies power from the engine to the transmission. The clutch is responsible for connecting and disconnecting the shaft from the transmission. The stick shift controls the gear selector fork by choosing gears. These gears and shafts are responsible for routing power from the engine to the transmission and to the drive wheels. Manual transmission fluid cleans the internal gears, shafts, bearings, and other components. Transmission fluid also helps to regulate the internal temperatures of the transmission. A manual transmission service will ensure that your transmission fluid is clean and the rest of the components are fit for operation.