Possible reasons for the automatic transmission clicking when you press the brake pedal:
* Mismatch between engine control unit (ECU) and transmission control unit (TCU):
– Failure of communication between the ECU and TCU can cause problems with shifting gears and clicking noises when applying the brakes.
*Low transmission fluid level:
– Insufficient fluid levels can cause problems with the hydraulic system, which can cause clicking noises.
* Contaminated transmission fluid:
– Contamination can cause deposits and debris to accumulate in the system, which can cause valves to stick and click.
* Worn transmission solenoids:
– Solenoids are responsible for shifting gears, and wear and tear can cause problems with smooth shifting, causing clicking noises.
* Gearbox servo defect:
– The servo is responsible for controlling the clutches, and if it malfunctions, it can cause gear shifting problems and clicking noises.
* Problems with torque converter:
– The torque converter connects the engine to the transmission, and malfunctions can cause vibration and clicking noises.
* Worn clutch disc:
– Worn clutch discs can slip, which can cause clicking noises when shifting gears.
Troubleshooting steps:
* Check the level and condition of the transmission fluid. Replace or add fluid if necessary.
* Scan your vehicle for trouble codes. This can help identify any electrical or communication problems.
* Have the transmission inspected by a qualified mechanic. They can determine the source of the clicking noise and recommend appropriate repair work.
* Replace faulty components. Depending on the cause of the clicking noise, the solenoids, servo, clutch disc, or other parts may need to be replaced.
* Reprogram ECU and TCU. In some cases, reprogramming can eliminate mismatch problems between control units.