MAIN FUNCTIONS:
1. Transfers engine power to the wheels – It sends power from the engine to drive the vehicle.
2. Changes gear ratios – Allows the vehicle to operate efficiently at different speeds and loads.
3. Controls vehicle speed and torque – Provides more torque for starting and climbing, and higher speeds for cruising.
4. Enables reverse movement – Allows the vehicle to move backward.
5. Improves fuel efficiency – Keeps the engine operating within its optimal RPM range.
WHY IT MUST BE REPLACED:
1 The transmission slips and cannot properly transfer power.
2 There is major internal failure of clutches, bands, or bearings.
3 The transmission fluid is contaminated and has caused extensive damage.
4 Repair costs exceed the cost of a replacement unit.
5 The vehicle cannot shift gears properly or loses drive completely.