how to fix the jerking transmission in my BMW 5 Series F10/F11 (2010-2017)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to avoid electrical short circuits.

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Raise the vehicle securely using jack stands.
  2. Locate the transmission drain plug; place a drain pan underneath.
  3. Remove the drain plug and allow the old fluid to drain completely.
  4. Inspect the old fluid for metal shavings or debris.
  5. Replace the drain plug and torque it to the manufacturer's specifications (typically around 30 Nm).
  6. Remove the transmission fill plug and use a funnel to add new transmission fluid (ensure it meets BMW specifications, typically ATF type) until it reaches the appropriate level.

3. Reset Transmission Adaptations

• Sub-steps:
  1. Reconnect the battery terminal.
  2. Start the engine and let it idle for a few minutes.
  3. Use a diagnostic tool to reset the transmission adaptations to allow the TCM to relearn shift points.
  4. Test drive the vehicle to ensure that the transmission is shifting smoothly.

4. Inspect and Replace TCM (if necessary)

• Sub-steps:
  1. Locate the TCM, which is typically found near the transmission or under the driver's seat.
  2. Disconnect the wiring harness and remove the TCM from its mounting.
  3. Install the new TCM (if replacement is necessary) and connect the wiring harness securely.
  4. Recheck and clear any fault codes using the diagnostic tool.