Causes of detonation when shifting automatic transmission gears:
* Faulty sensors: A faulty engine speed sensor, throttle position sensor, or camshaft position sensor can provide incorrect data to the automatic transmission control unit (ECU), resulting in improper shifting and knocking.
* Wear on automatic transmission components: Worn clutches, bands or brakes can slip when shifting gears, causing detonation.
*Low transmission fluid level: Insufficient transmission fluid levels can lead to low system pressure and slippage of automatic transmission components.
* Contaminated transmission fluid: Contaminated transmission fluid contains abrasive particles that can damage automatic transmission components and cause detonation.
* Torque Converter Malfunction: The torque converter converts engine torque into hydraulic energy used to change gears. Its malfunction can lead to detonation.
* Software glitches: The automatic transmission ECU may contain software errors that lead to improper shift control and detonation.
What to do if detonation occurs:
* Check transmission fluid level: Make sure the fluid level is at the recommended level and that the fluid is clean and does not have a burning odor.
* Scan trouble codes: Use an OBD-II scanner to read trouble codes in the automatic transmission ECU memory. This may help identify the faulty component.
* Check the sensors: Check the engine speed, throttle position and camshaft position sensors to ensure they are working correctly.
* Repair or replace faulty components: Depending on the cause of detonation, faulty components such as clutches, bands, sensors or torque converter may need to be repaired or replaced.
*Reprogram the automatic transmission ECU: If the knock is caused by software glitches, the automatic transmission ECU may need to be reprogrammed.
*Consult a mechanic: If detonation persists, it is recommended that you contact a qualified mechanic for further diagnosis and repair.