how to fix transmission slipping in my Volkswagen Passat B8 (2015-2022) when accelerating?

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the battery to prevent any electrical issues during repair.

2. Check and Replace Transmission Fluid

• Tools Required: Socket set, funnel, fluid catch pan.
• Sub-steps:
  1. Locate the transmission pan and remove the drain plug or pan bolts to drain the old fluid into a catch pan.
  2. Inspect the old fluid for debris or discoloration, indicating a need for a full transmission service.
  3. Replace the drain plug, ensuring it is torqued to manufacturer specifications.
  4. Refill the transmission with new fluid through the dipstick tube using a funnel; consult the owner's manual for the correct fluid type and amount.

3. Inspect and Replace Transmission Filter

• Tools Required: Socket set, transmission filter kit.
• Sub-steps:
  1. Remove the transmission pan bolts and carefully lower the pan.
  2. Remove the old filter from the transmission and inspect the filter for clogs.
  3. Install the new filter, ensuring it is seated correctly.
  4. Clean the transmission pan and install a new gasket before reattaching the pan.

4. Check Transmission Linkage and Solenoids

• Tools Required: Multimeter, socket set.
• Sub-steps:
  1. Inspect the transmission linkage for any signs of wear or misalignment, and make adjustments as needed.
  2. Test the transmission solenoids using a multimeter to ensure they are within specifications; replace if defective.

5. Reconnect Battery and Test

• Sub-steps:
  1. Reconnect the battery terminals.
  2. Start the engine and allow it to reach operating temperature.
  3. Test drive the vehicle to ensure the slipping issue has been resolved.