my Porsche Cayenne E3 (2018-Present) transmission jerks when shifting, why?

Solution

1. Preparation

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

2. Check and Change Transmission Fluid

• Tools Required: Socket set, funnel, transmission fluid pump.
• Sub-steps:
  1. Remove the transmission fluid pan using a socket set to access the fluid.
  2. Drain the old transmission fluid into a suitable container.
  3. Inspect the old fluid for debris or burnt smell; if contaminated, a deeper inspection may be required.
  4. Replace the transmission filter if applicable.
  5. Reinstall the fluid pan and torque bolts to the manufacturer’s specifications.
  6. Fill the transmission with the correct type and amount of fluid as specified in the user manual.

3. Inspect and Replace Transmission Control Module (if necessary)

• Tools Required: Socket set, multimeter.
• Sub-steps:
  1. Locate the transmission control module (usually near the transmission).
  2. Disconnect the electrical connectors and remove the module.
  3. Test the module with a multimeter to ensure it is functioning properly.
  4. If faulty, replace it with a new module, reconnect the connectors, and ensure they are secure.

4. Adjust Gear Linkage (if misaligned)

• Tools Required: Wrench set.
• Sub-steps:
  1. Inspect the gear linkage for proper alignment.
  2. If misaligned, adjust the linkage according to the service manual specifications.
  3. Test the shifting mechanism to ensure smooth operation.