why is my Porsche Cayenne E3 (2018-Present) transmission jerking when shifting

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, transmission fluid pump.
• Steps:
  • Ensure the vehicle is parked on a level surface and the parking brake is engaged.
  • Disconnect the battery to prevent electrical shorts while working on the transmission.

2. Fluid Inspection and Replacement

• Steps:
  • Remove the transmission fluid dipstick (if equipped) and check the fluid level.
  • If the fluid is low, locate the fill plug and use a transmission fluid pump to add the correct type of fluid (Porsche ATF).
  • If the fluid is dirty or burnt, proceed to drain the old fluid by removing the transmission pan (if applicable) and replace the filter.
    • Sub-steps:
      • Remove the bolts securing the transmission pan and carefully lower it.
      • Replace the transmission filter according to the manufacturer's specifications.
      • Reinstall the pan and torque the bolts to the specified torque values.

3. Electrical System Check

• Steps:
  • Reconnect the battery and use the OBD-II scanner to clear any fault codes.
  • Re-scan the system to check if any codes return after clearing them.
  • If transmission-related codes persist, further investigation into the TCM may be required.

4. Mount Inspection and Replacement

• Steps:
  • Inspect the engine and transmission mounts visually for cracks or excessive wear.
  • If any mounts are found to be faulty, replace them by:
    • Supporting the transmission with a jack.
    • Removing the bolts securing the damaged mount and installing a new mount.
    • Torque the new mount bolts to the manufacturer’s specifications.