Ford E8TZ-7A039-J Transmission Extension Housing

The Borg Warner 13-56 Electronic Shift system has components like an electronic control module, 4WD switch, wire harness, neutral safety switch, speed sensor, shift motor, front drive gear clutch, shift cam, and a transfer case. When you press the switch, the module looks at the sensors to make sure the vehicle is in 2WD mode and within the speed limit. If so, the module activates the clutch to synchronize the drive lines and the motor rotates the shift drum to engage 4WD. After the shift, the module verifies the mode and lights up the indicator. For 4WD low, the module ensures the vehicle is stationary and neutral before engaging the shift motor.

The fasteners should be tightened to the specified torque.

The function of all transfer cases mentioned is to transfer power from the transmission to the wheels.

Some suggestions for DIY repair of a transfer case include drawing a diagram or taking photos or videos during the disassembly process, removing peripheral components before working from the rearmost case forward, checking for missed bolts or snap rings before applying excessive force, paying attention to critical components like oil pumps and shifting mechanisms, anticipating and having replacement parts available, ensuring cleanliness and adequate space during work, pre-lubricating parts with the appropriate fluid, testing the case for any abnormalities before reinstalling, and filling the case with the correct type and quantity of fluid.

Install the heat shield on the transfer case and torque the bolts to 27-37 ft. lbs.

Add lubricant until it does run out, then install the fill plug.

Move the transfer case in cab shift lever to all shift positions to check for positive engagement. There should be a clearance between the shift lever and the cam plate in the 2H front and 4H rear (clearance not to exceed 3.3mm) and 4L shift positions.

Unplug the electrical connector from the vehicle speed sensor, the 4WD indicator switch, and the transfer case coil for manual-shift vehicles. For electric-shift vehicles, unplug the electric shift motor connector.

Drain the lubricant from the transfer case.

When shifting into 4WD low, the transfer case planetary gears are activated for gear reduction of the 2WD output shaft, providing reduced gearing to both axles.

The tools necessary for an overhaul include internal and external snap-ring pliers, a bearing puller, a slide hammer, a set of pin punches, a dial indicator, and possibly a hydraulic press. Additionally, a large, sturdy workbench and a large vise will be required.

Raise the vehicle and support it securely on jackstands.