Ford F3LY-7A039-A Transmission Extension Housing

If the vehicle is equipped with air suspension, turn off the air suspension system using the switch located in the area of the right kick panel. Raise the vehicle and support it securely on jackstands. Remove the transfer skid plate bolts, then take off the skid plate. Drain the transfer case lubricant. Remove the front driveshaft shield, followed by the front and rear driveshafts. Take out the torsion bars and the rear torsion bar support. For manual shift vehicles, disconnect the shift rod. Unplug the electrical connector from the vehicle speed sensor, and for manual-shift vehicles, also unplug the electrical connector from the 4WD indicator switch and the transfer case coil. For electric-shift vehicles, unplug the electric shift motor connector. Support the transfer case with a jack, preferably a special jack designed for this purpose, using safety chains or tie-downs to steady it. Remove the transfer case-to-transmission bolts. Make a final check to ensure all wires and hoses have been disconnected from the transfer case, then move the transfer case and jack toward the rear of the vehicle until the transfer case is clear of the transmission, keeping it level during this process. Once the input shaft is clear, lower the transfer case and remove it from underneath. Installation is the reverse of removal, ensuring to tighten the transmission-to-transfer case bolts to the specified torque.

Place a transmission jack beneath the transfer case and apply jack pressure to slightly raise the transfer case. Use safety chains to secure the transfer case to the jack.