Diagnose transmission fluid leak Audi Q5

Diagnosing a Transmission Fluid Leak in an Audi Q5 (2008-2017)

Tools Required

• Floor jack and jack stands
• Transmission jack
• Drain pan
• Socket set
• Torque wrench
• Screwdrivers
• Flashlight
• Clean rags
• Safety glasses and gloves

Repair Instructions

If the Leak is from the Transmission Pan Gasket:

1. Drain the Transmission Fluid

   • Place a drain pan under the transmission pan.
   • Remove the drain plug using a socket wrench and allow the fluid to fully drain.

2. Remove the Transmission Pan

   • Unscrew the bolts securing the transmission pan.
   • Carefully lower the pan, avoiding spillage.

3. Replace the Gasket

   • Remove the old gasket and clean the pan surface thoroughly with a rag.
   • Install a new gasket onto the pan.
   • Reattach the pan to the transmission and torque the bolts evenly to the manufacturer’s specifications.

4. Refill Transmission Fluid

   • Refill with the appropriate type and amount of transmission fluid as specified in the owner's manual.

If the Leak is from the Transmission Cooler Lines:

1. Inspect the Lines

   • Check for cracks or damage along the cooler lines.

2. Replace or Tighten Connections

   • If the lines are damaged, replace them with OEM parts.
   • Tighten any loose connections using a wrench.

If the Leak is from Seals:

1. Input/Output Shaft Seal Replacement
   • These repairs are more complex and may require removal of the transmission. It is often advised to consult with or have the repair performed by a professional technician.

Final Steps

1. Lower the Vehicle

   • Remove the jack stands and safely lower the vehicle.

2. Test Drive

   • After repairs, take the vehicle for a short test drive to ensure the leak is resolved and the transmission operates smoothly.

3. Recheck for Leaks

   • After the test drive, inspect the repair area for any signs of fluid leakage.

Conclusion

Diagnosing and repairing a transmission fluid leak involves identifying the leak source, performing necessary repairs, and ensuring that the fluid level is correct. For more complex repairs, especially those involving seals, professional assistance is recommended. Regular maintenance and checks can help prevent future leaks.