Ford 6R80 Transmission Harsh Shifts P0720 P0722 P0731 OSS Failure: Molded Lead Frame Replacement!
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:
- 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
-
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.
-
Inspect the Pan and Gasket
- Check the pan for any damage and replace the gasket if necessary.
Step 4: Access the Valve Body
-
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
- Use a torque wrench to remove the valve body bolts using the specified torque specs:
-
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
-
Remove the Old Lead Frame
- Disconnect any electrical connectors and remove the old molded lead frame from the valve body.
-
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
-
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.
-
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.