The drivetrain of your BMW includes the transmission, the driveshaft, the axles, and the wheels. It works in conjunction with the engine to move the wheels. The drivetrain system is an essential component of a vehicle and the transmission is an integral part of the drivetrain. The drivetrain and transmission are two different things. The main function of the transmission is similar to the chain on the bicycle. It keeps the engine turning in time with the wheels, regardless of what gear your BMW is in. The drivetrain represents everything that is behind the transmission involved in propelling the vehicle. It convey power from your BMW’s engine through the transmission to the drive wheels on the vehicle to control the amount of torque. Browse through all our transmission and drivetrain products with us.