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

3 min read 6 months ago
Published on Aug 14, 2024 This response is partially generated with the help of AI. It may contain inaccuracies.

Table of Contents

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:

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.