what causes my BMW X3 G01 (2018-2024) transmission to jerk at low speeds

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is turned off.
• Disconnect the battery to prevent electrical shorts.

2. Fluid Check and Replacement

1. Remove the transmission dipstick and check fluid level.
2. If low, add the recommended transmission fluid (check owner’s manual for specifications).
3. If fluid is dark or has a burnt smell, proceed to replace the transmission fluid.
4. Drain the old fluid from the transmission pan using a socket set.
5. Replace the transmission filter if applicable, following the manufacturer's guidelines.
6. Refill the transmission with new fluid, checking the level with the dipstick.

3. TCM Reprogramming

1. Reconnect the battery and turn on the ignition without starting the engine.
2. Use a compatible diagnostic tool to access the TCM.
3. Check for software updates and perform any necessary reprogramming.
4. Clear any existing error codes after reprogramming.

4. Inspect and Replace Mounts (if necessary)

1. Raise the vehicle securely using jack stands.
2. Inspect engine and transmission mounts for signs of wear or damage.
3. If mounts are worn, remove them using a socket set and replace with new mounts.
4. Torque the new mounts to the manufacturer specifications.