how to fix the transmission slipping in my Ford F-150 Fourteenth Generation (2021-present)?

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and secure it with wheel chocks.
• Disconnect the battery negative terminal to prevent electrical shorts.

2. Fluid and Filter Change

• Tools Required: Socket set, torque wrench, transmission fluid pump.
• Sub-steps:
  1. Place a drain pan under the transmission pan.
  2. Remove the transmission pan bolts and carefully lower the pan.
  3. Remove the old filter and replace it with a new one.
  4. Clean the transmission pan and magnet, removing any debris.
  5. Reinstall the pan with a new gasket, tightening bolts to the manufacturer's specified torque (usually around 10-12 ft-lbs).
  6. Refill the transmission with the recommended fluid type (usually Mercon LV for Ford) through the dipstick tube, following the specified capacity.

3. Inspect and Replace Solenoids

• Tools Required: Multimeter, socket set.
• Sub-steps:
  1. Locate the transmission solenoids (typically found on the valve body).
  2. Disconnect the electrical connectors and remove the solenoids.
  3. Test the solenoids for resistance using a multimeter; replace if they are out of specifications.
  4. Reinstall any new solenoids, ensuring secure connections.

4. Final Checks

• Tools Required: OBD-II scanner.
• Sub-steps:
  1. Reconnect the battery terminal.
  2. Start the engine and let it idle while checking for any leaks.
  3. Use the OBD-II scanner to clear any error codes.
  4. Take the vehicle for a test drive to ensure the slipping issue has been resolved.