Ford Edge/Lincoln MKX PTU & Rear Differential Service How-To

Introduction

This tutorial provides a comprehensive guide on servicing the Power Transfer Unit (PTU) and rear differential of the Ford Edge and Lincoln MKX. Regular maintenance is crucial, particularly for the PTU, which operates in high-temperature conditions. It's recommended to perform this service every 30,000 miles to ensure optimal performance and longevity.

Step 1: Gather Required Materials

Before starting the service, ensure you have the following tools and materials:

• PTU Oil (link: PTU Oil)
• Rear Differential Oil (link: Differential Oil)
• Permatex Thread Sealant (link: Thread Sealant)
• OEM Tools Fluid Extractor (link: Fluid Extractor)
• Fluid Pump (link: Fluid Pump)
• Wrench set
• Safety gloves and goggles
• Drain pan

Step 2: Prepare the Vehicle

• Park the vehicle on a level surface.
• Ensure the engine is turned off and cool before starting.
• Secure the vehicle with wheel chocks to prevent movement.

Step 3: Drain the PTU Fluid

1. Locate the PTU under the vehicle.
2. Use a wrench to remove the drain plug.
3. Position a drain pan underneath to catch the old fluid.
4. Allow the fluid to completely drain out.

Step 4: Refill the PTU with New Oil

1. After draining, clean the drain plug and apply Permatex Thread Sealant.
2. Replace the drain plug securely.
3. Use the fluid pump to fill the PTU with new oil through the fill hole until it begins to overflow.
4. Replace the fill plug securely, ensuring it is sealed properly.

Step 5: Drain the Rear Differential Fluid

1. Locate the rear differential.
2. Remove the drain plug using a wrench.
3. Position a drain pan to collect the old fluid.
4. Allow the fluid to drain completely.

Step 6: Refill the Rear Differential with New Oil

1. Clean the drain plug and apply Permatex Thread Sealant.
2. Replace the drain plug securely.
3. Use the fluid pump to fill the rear differential with new oil until it starts to overflow.
4. Replace the fill plug and ensure it is sealed tightly.

Conclusion

Regular servicing of the PTU and rear differential is essential for maintaining your Ford Edge or Lincoln MKX. By following these steps every 30,000 miles, you can prevent potential issues and ensure your vehicle runs smoothly. Be sure to keep track of your maintenance schedule and address any leaks or fluid degradation promptly.