What Causes Jerking in Automatic Transmissions?
1 Answers
Automatic transmission jerking is caused by: excessively high transmission fluid temperature leading to stubborn dirt and impurities inside the transmission, which form blockages in the valve body. This obstructs smooth solenoid valve movement, preventing proper oil pressure regulation and resulting in jerking, impact, and slippage faults. More details are as follows: 1. Lack of power during acceleration, noticeable vehicle surging and jerking at low or medium speeds, accompanied by fluctuating RPM needle on the dashboard; during medium-high speed driving when abruptly pressing the accelerator pedal, the vehicle slips with rapid RPM needle rise and distinct impact sensation. 2. Significant impact sensation when shifting from P to R or D gear, with gear clashing. Abnormal noises or even loud noises from the transmission during idling, driving, or high-load operation, accompanied by irregular, dull sounds during gear shifts. The root cause: prolonged high temperatures degrade transmission fluid's anti-wear and lubricating properties, causing wear or severe wear on transmission bearings, gears, or damage to gear side surfaces. 3. Computer displays "transmission overheating" warning during driving; or perceived excessive transmission heat after driving, even becoming too hot to touch. Cause: inability to effectively control temperature during high-load operation. If temperature rises further, the transmission begins slipping, which in turn causes even higher temperature increases.
