Reasons why the automatic transmission sometimes kicks:
1. Low transmission fluid level:
Low fluid levels cause a decrease in pressure in the system, which causes problems when shifting gears.
2. Contaminated or old transmission fluid:
Dirty fluid contains metal shavings, dirt and debris that can clog the system and make it difficult to shift smoothly.
3. Faulty solenoids:
Solenoids are responsible for controlling the flow of fluid in the transmission. A faulty solenoid can result in incorrect gear shifting.
4. Worn friction discs:
Friction discs help transfer power between gears. Worn discs can slip, causing jerking during gear changes.
5. Faulty torque converter:
The torque converter transfers power from the engine to the transmission. A faulty torque converter can cause jerking when shifting gears.
6. Electrical wiring problems:
Electrical wiring problems can disrupt the electronic components of the transmission, resulting in rough shifting.
7. Software problems:
Modern automatic transmissions are controlled electronically. Errors in the software can cause the transmission to behave incorrectly.
8. Worn bearings:
Worn bearings can create noise or vibration and cause jerking when shifting gears.
9. Faulty Transmission Control Module (TCM):
The TCM controls the operation of the transmission. A faulty module can cause various problems, including jerking.
10. Mechanical problems:
Serious mechanical problems, such as broken gears or failed shafts, can cause severe jerking or inability to shift gears.