The transmission fluid helps lubricate the moving parts of the transmission and transfer power from the engine to the wheels. If the fluid level is low, it can cause the transmission to shift roughly or not shift at all.
Dirty transmission fluid:
Over time, the transmission fluid can become dirty and contaminated with debris. This can cause the transmission to shift roughly, slip, or shudder.
Faulty transmission solenoids:
The transmission solenoids control the flow of fluid in the transmission. If a solenoid is faulty, it can cause the transmission to shift roughly or not shift at all.
Faulty torque converter:
The torque converter is responsible for transmitting power from the engine to the transmission. If the torque converter is faulty, it can cause the transmission to shift roughly or not shift at all.
Faulty transmission control module:
The transmission control module (TCM) is the brain of the transmission. It controls the shifting of the transmission and monitors the transmission fluid pressure and temperature. If the TCM is faulty, it can cause the transmission to shift roughly or not shift at all.
