Main shaft: It is also often called an output shaft. It provides required torque towards the car or truck. It's got ridges and enamel And so the gears can move smoothly. Asap hitam sebab injektor kotor,plug yang cepat hitam,air filter kotor dan minyak hitam yang naik sehingga silinder head. Salam. https://gearbox-auto79012.answerblogs.com/34005383/details-fiction-and-gearbox-auto