how to fix a slipping transmission in Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Check and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, funnel, socket set, torque wrench.
• Remove the transmission fluid drain plug using the socket set and allow fluid to drain into a pan.
• Inspect the fluid for metal shavings or burnt smell. If contaminated, replace the fluid.
• Reinstall the drain plug and torque to manufacturer specifications (typically around 30 Nm).
• Use the transmission fluid pump to refill the transmission with the appropriate type of fluid (consult manufacturer specifications for type).

3. Inspect and Replace Transmission Filter

• Tools Required: Socket set, torque wrench, gasket scraper.
• Remove the transmission pan by unscrewing the bolts with the socket set.
• Carefully remove the old filter and inspect for debris.
• Replace with a new transmission filter, ensuring it aligns properly.
• Clean the transmission pan and replace the gasket or use RTV sealant as needed, then reattach the pan with bolts torqued to specifications (usually around 10 Nm).

4. Check and Repair TCM Connections

• Tools Required: Multimeter, wire stripper/crimper.
• Inspect the TCM harness for any visible damage or corrosion.
• Use a multimeter to test for continuity and proper voltage at the connectors.
• Repair or replace any damaged wiring or connectors.

5. Reconnect Battery and Test

• Reconnect the battery and clear any diagnostic trouble codes (DTCs).
• Conduct a thorough test drive under various conditions to ensure proper shifting and acceleration.