Diagnose transmission fluid leak Audi A6

Repair Instructions

1. Transmission Pan Gasket Replacement:

   • Drain Fluid: Position a drain pan under the transmission pan. Remove the transmission pan bolts with a socket set, allowing the fluid to drain completely.
   • Replace Gasket: Remove the old gasket from the pan. Clean the pan surface and install a new gasket.
   • Reattach Pan: Secure the transmission pan with bolts, ensuring even torque to prevent warping.

2. Seal Replacement (if applicable):

   • Identify Faulty Seal: Determine which seal (input/output) is leaking.
   • Remove Old Seal: Use a seal puller to carefully remove the faulty seal.
   • Install New Seal: Apply a thin layer of transmission fluid to the new seal and gently press it into place using a seal driver.

3. Cooler Line Repair:

   • Tighten Connections: Check and tighten any loose cooler line fittings.
   • Replace Damaged Lines: If lines are cracked, replace them with OEM parts.

4. Refill Transmission Fluid:

   • Refill the transmission with the correct type and amount of fluid specified for the Audi A6 C7.
   • Run the engine and shift through all gears to circulate the fluid. Recheck the fluid level and add more if necessary.

5. Final Check:

   • Inspect for leaks once more after the repair.
   • Test drive the vehicle to ensure normal transmission operation.

Conclusion

By following these detailed diagnostic and repair steps, you should be able to identify and fix a transmission fluid leak in an Audi A6 C7. Always refer to the vehicle's service manual for specific procedures and torque specifications. If the issue persists, consult a professional technician for further diagnosis.