Possible causes of shocks when braking on a Ford Mondeo automatic transmission:
Mechanical problems:
* Worn or dirty brake pads or rotors.
* Faulty brake pedal position sensor.
* Mechanical problems in the automatic transmission itself, such as worn clutch clutches or torque converter.
* Problems with the driveshaft or inner CV joints.
Hydraulic problems:
*Low or contaminated transmission fluid.
* Faulty or clogged transmission filter.
* Faulty hydraulic valves in automatic transmission.
Electronic problems:
* Faulty or dirty speed sensors.
* Faulty automatic transmission control module (PCM).
Other possible reasons:
* Improper transmission maintenance, such as failure to change fluid on time.
* Worn engine or transmission mounts.
* Problems with the vacuum brake booster.
* Malfunctions in the traction or stability control system.
Diagnostics and repair:
It is recommended that you contact a qualified mechanic to diagnose and repair brake vibration. They will do the following:
* Check the brake system for wear or damage.
* Check the level and condition of the transmission fluid.
* Read diagnostic trouble codes (DTCs) from the PCM.
* Automatic transmission sensors and valves will be tested.
* Conduct mechanical diagnostics of automatic transmission, if necessary.
Depending on the identified cause, the following repair work may be required:
* Replacement of brake pads or rotors.
* Replacement of the brake pedal position sensor.
* Automatic transmission repair or replacement.
* Replacing the driveshaft or CV joints.
* Replacement of transmission fluid and filter.
* Repair or replacement of automatic transmission hydraulic valves.
* PCM firmware update.
* Replacement of engine or transmission mount.