How to fix transmission slipping Audi A6

Fixing a slipping transmission in an Audi A6 C7 (2011-2018) involves a systematic approach to diagnose and resolve the issue. Below are detailed steps to help you troubleshoot and potentially fix the problem.

Tools Required

• OBD-II Scanner
• Torque wrench
• Basic hand tools (sockets, screwdrivers, etc.)
• Transmission fluid pump
• Drain pan
• Jack and jack stands
• Clean rags
• Safety glasses and gloves

Repair Instructions

Step 1: Replace Transmission Fluid and Filter

1. Drain Transmission Fluid:

   • Lift the vehicle using a jack and secure it with jack stands.
   • Place a drain pan under the transmission pan.
   • Remove the transmission pan bolts and carefully lower the pan to drain the old fluid.

2. Replace Transmission Filter:

   • Remove the old transmission filter and O-ring.
   • Install a new filter and O-ring, ensuring a proper seal.

3. Clean and Reinstall Transmission Pan:

   • Clean the transmission pan and magnet to remove any metal shavings.
   • Install a new gasket and torque the pan bolts to manufacturer specifications.

4. Refill Transmission Fluid:

   • Refill the transmission with the correct type and amount of fluid through the fill plug or dipstick tube.
   • Use a transmission fluid pump for ease.

Step 2: Relearn Transmission Shift Points

• Some transmission issues may require a relearning procedure using a scan tool to reset and calibrate shift points.
• Follow the specific instructions provided by the scan tool manufacturer or service manual for completing the relearn process.

Additional Considerations

• Transmission Software Update: Check if there are any software updates from Audi for the transmission control module (TCM) that may address slipping issues.
• Professional Inspection: If the issue persists after performing the above steps, it may be necessary to consult a professional technician as internal components (e.g., clutch packs, solenoids) could be the cause of the slipping.

Safety Precautions

• Always wear safety glasses and gloves when working under the vehicle.
• Ensure the vehicle is securely supported by jack stands before working underneath.
• Dispose of old transmission fluid according to local regulations.

By following these steps, you should be able to diagnose and fix a slipping transmission in your Audi A6 C7. If the problem continues, it might be necessary to seek professional assistance or consider a transmission rebuild or replacement.