Possible reasons for the automatic transmission jerking when braking:
1. Wear of brake pads or discs:
* Precise and timely braking can cause uneven pad or rotor wear.
* This may cause the vehicle to decelerate unevenly and the transmission to jerk.
2. Malfunction of brake calipers:
* Stuck or faulty calipers can prevent pressure from being applied evenly to the brake pads.
* This may result in jerking and shaking during braking.
3. Transmission fluid problems:
*Low or contaminated transmission fluid levels can result in insufficient transmission pressure.
* This may cause clutch slippage and jerking.
4. Wear of friction clutches:
*High torque or aggressive driving can wear out the clutches in the transmission.
* This may result in jerking and slipping during gear changes.
5. Faulty solenoids:
* Solenoids are responsible for shifting gears in an automatic transmission.
* Their malfunction may cause delays in switching or jerking.
6. Sensor malfunction:
* Sensors such as the speed sensor or throttle position sensor provide critical data for transmission control.
* If they malfunction, they may interfere with the smoothness of gear shifting and cause jerking.
7. Problems with the electronic control unit (ECU) software:
* The computer controls the operation of the automatic transmission.
* Bugs in the software may result in incorrect shifting or jerking.
What to do:
*Consult a qualified mechanic to diagnose the problem.
* Replace worn or faulty components such as brake pads, calipers or transmission fluid.
* Check and adjust sensors and solenoids.
*Update the ECU software if necessary.