Causes of impacts when changing gears in an automatic transmission:
* Low or dirty transmission oil: Low or dirty transmission fluid can cause increased friction and wear on automatic transmission components, causing shifting shock.
* Clutch Wear: Clutches are discs that create the friction needed to change gears. Over time, clutches wear out, which can lead to slipping and jerking when shifting.
* Faulty solenoids: Solenoids control the flow of transmission oil, allowing gears to be changed. Faulty solenoids can cause erratic shifting and knocking.
* Torque converter wear: The torque converter transfers torque from the engine to the transmission. Worn torque converter can cause shifting shock due to fluctuations in oil pressure.
* Faulty automatic transmission control module (TCM): The TCM is an electronic module that controls the operation of the automatic transmission. Faults in the TCM can result in improper shifting and knocking.
* Clogged Oil Filter: A dirty oil filter can restrict oil flow and cause shifting problems.
*Mechanical faults: Serious mechanical faults, such as damage to the planetary gear or gears, can also cause shifting shock.
Possible solutions:
*Checking and Changing Transmission Oil: Make sure the oil level is correct and change the oil if it is dirty or old.
* Replacement of clutches: If the clutches are worn out, they must be replaced.
*Diagnosis and replacement of solenoids: Faulty solenoids must be diagnosed and replaced.
* Torque Converter Repair or Replacement: If the torque converter becomes worn, it may require repair or replacement.
*TCM Repair or Replacement: A faulty TCM must be repaired or replaced.
* Oil filter replacement: Replace the clogged oil filter.
* Diagnosis and repair of mechanical problems: Have any serious mechanical problems diagnosed and repaired by a qualified mechanic.
It is important to promptly correct automatic transmission shift shocks as they can lead to further damage and costly repairs.