Possible reasons for automatic transmission jerking when braking in Ford cars:
1. Dirty or low transmission fluid level:
* Dirty fluid can cause the friction discs to slip, resulting in jerking.
*Low fluid levels can lead to oil starvation and overheating.
2. Worn friction discs:
* Worn friction discs can cause slippage, resulting in jerking.
3. Clogged ratio control solenoid:
*A clogged solenoid may prevent the transmission from shifting properly.
4. Faulty speed sensor:
* A faulty speed sensor may provide inaccurate data to the transmission control module, resulting in incorrect gear shifting.
5. Worn or damaged transmission mounts:
* Worn mounts can allow the transmission to move, causing jerky shifting.
6. Faulty Transmission Control Module (TCM):
*A faulty TCM can cause abnormal shifting and jerking.
7. Electrical wiring problems:
* Damaged wires or connectors can disrupt communication between the TCM and other transmission components, resulting in malfunctions.
8. Torque converter:
* A faulty torque converter may cause jerking when locking or unlocking.
What to do:
* Check and replace transmission fluid if necessary.
* Scan the vehicle for trouble codes that may indicate a specific problem.
* Contact a car service for diagnosis and repair if the problem cannot be solved on your own.
Note: Driving with a jerking transmission for extended periods of time can cause serious damage and costly repairs.