This course offers comprehensive knowledge of differential systems in light and heavy vehicles. Participants will learn the principles of differential operation, including how differentials allow wheels to rotate at varying speeds during turns. The course covers essential components such as crown wheels, pinion gears, and spider gears, alongside procedures for stripping, cleaning, and reassembling differentials. Students will also learn to inspect and measure key specifications such as backlash, preload, and tooth contact patterns. By the end of the course, participants will be equipped to maintain, troubleshoot, and repair differential systems.