Possible reasons for the automatic transmission jolting when releasing the brake:
Problems with torque converter:
* Wear of torque converter friction linings
* Damage to turbine pump or stator
* Torque converter lock-up malfunction
Problems with the electronic control unit (ECU):
*ECU malfunction
* Faulty gear shift solenoids
* Errors in the transmission control program
Oil and filter problems:
* Low oil level in automatic transmission
* Contaminated or untimely oil change
* Clogged oil filter
Problems with the mechanical part of the automatic transmission:
* Worn clutches or brake bands
* Problems with planetary gearbox
* Deformation of the automatic transmission housing
Other possible reasons:
* Worn or broken engine and gearbox mounts
* Faulty rpm or speed sensors
*Wiring problems
How to eliminate automatic transmission jolts when releasing the brake:
* Contact a car service to diagnose the automatic transmission using a scanner.
* Check and, if necessary, replace the automatic transmission oil and filter.
*Repair any problems found with the torque converter, ECU, sensors or mechanical components.
* Check and, if necessary, replace engine and gearbox mountings.
*Update the ECU software if necessary.