Mechanical faults:
* Slipping: Friction discs are worn or damaged, resulting in loss of traction.
* Sticking or Slipping: The solenoids or hydraulic circuits are faulty, preventing gear shifting.
* Noise or vibration: Bearings, gears or other transmission components are worn.
* Oil Leak: Transmission seals or oil seals are worn or damaged, causing fluid to leak.
* Shaft breakage: Excessive load or material defects will cause the shaft to break.
Electrical faults:
*Transmission Control Module (TCM) failure: The electronic component that controls the transmission may fail.
* Faulty solenoids: The solenoid valves that control fluid flow can fail, preventing gear shifting.
* Faulty sensors: Sensors that monitor speed, rpm and shift position may provide incorrect information to the TCM.
* Faulty wiring: Opens or shorts in wiring can disrupt communication between transmission components.
Hydraulic faults:
*Low Oil Pressure: Leaks or worn components can reduce the oil pressure needed to operate the transmission.
* Dirty or contaminated oil: Debris or metal particles in the oil can clog valves and circuits and cause shifting problems.
*Oil pump failure: The pump may fail, causing loss of oil pressure.
Other faults:
* Friction disc wear: The transmission claws that are responsible for transferring power can wear out and slip.
* Housing Deformation: Severe impacts or design defects can cause the transmission housing to become deformed, affecting the operation of internal components.
* Gear wear: The gears that transmit power through the transmission can wear out and become noisy or vibrate.