Ford 6R80 Transmission Harsh Shifts P0720 P0722 P0731 OSS Failure: Molded Lead Frame Replacement!

Introduction

This tutorial will guide you through the process of replacing the molded lead frame in a Ford 6R80 transmission, addressing common issues like harsh shifts and error codes P0720, P0722, and P0731. This repair is crucial for enhancing the reliability of the transmission in 2011-2017 Ford vehicles.

Step 1: Gather Tools and Parts

Before starting, ensure you have all the necessary tools and parts:

• Updated Molded Lead Frame
• Bulkhead Sleeve
• Pump Pass Through Seal
• Assembly Lube
• Transmission Filter
• Transmission Fluid (up to 10 quarts)
• Transmission Pan Gasket (if damaged)
• Torque wrench
• Basic hand tools (sockets, ratchets, etc.)

Helpful Links for Parts:

• Updated Molded Lead Frame: Amazon Link
• Bulkhead Sleeve: Amazon Link
• Pump Pass Through Seal: Amazon Link
• Assembly Lube: Amazon Link
• Transmission Filter: Amazon Link
• Transmission Fluid: Amazon Link
• Transmission Pan Gasket: Amazon Link

Step 2: Prepare Your Workspace

• Park the vehicle on a level surface and engage the parking brake.
• Gather all tools and parts in your workspace for easy access.
• Ensure you have sufficient lighting to see all components clearly.

Step 3: Remove the Transmission Pan

1. Drain the Fluid

   • Place a drain pan beneath the transmission.
   • Remove the transmission pan bolts and carefully lower the pan to drain any remaining fluid.

2. Inspect the Pan and Gasket

   • Check the pan for any damage and replace the gasket if necessary.

Step 4: Access the Valve Body

1. Remove the Valve Body Bolts

   • Use a torque wrench to remove the valve body bolts using the specified torque specs:
     • Molded Lead Frame to Valve Body Bolts: 53 inch lbs
     • Valve Body to Case Bolts: 71 inch lbs

2. Take Out the Valve Body

   • Carefully lift the valve body from the transmission case, ensuring not to damage any components.

Step 5: Replace the Molded Lead Frame

1. Remove the Old Lead Frame

   • Disconnect any electrical connectors and remove the old molded lead frame from the valve body.

2. Install the New Molded Lead Frame

   • Align the new molded lead frame with the valve body and press it into place.
   • Reconnect any electrical connectors.

Step 6: Reassemble the Transmission

1. Reinstall the Valve Body

   • Carefully place the valve body back into the transmission case.
   • Tighten the valve body bolts according to the torque specifications provided.

2. Reattach the Transmission Pan

   • Apply assembly lube to the new gasket and position it on the pan.
   • Reinstall the transmission pan and tighten the bolts to 98 inch lbs.

Step 7: Fill with Transmission Fluid

• Use a funnel to fill the transmission with the appropriate amount of fluid (up to 10 quarts).
• Check the fluid level with the engine running and adjust as necessary.

Conclusion

Replacing the molded lead frame in a Ford 6R80 transmission can significantly improve shifting performance and reliability. Ensure that you follow the steps carefully and adhere to torque specifications. If you encounter any issues, consider consulting a professional for assistance.