To create the differential and axle assemblies in its new 2016 TITAN XD, Nissan turned to American Axle Manufacturing (AAM), a notable supplier of heavy-duty driveline components that have been used in the lineup of Nissan Commercial vehicles. American Axle & Manufacturing, Inc. front and rear differentials help enable the hauling and towing capabilities of the TITAN XD Cummins^® 5.0L V8 Turbo Diesel engine. The front axle features a 9.5-inch differential while a 10.5-inch unit handles the duties out back. There is an electronic locking rear differential (E-Lock) standard on the 2016 TITAN PRO-4X.

The TITAN XD PRO 4X features an electronic locking rear differential system designed to keep the vehicle from getting stuck. Drivers can activate this system via the control switch on the instrument panel.

Use E-Lock for added traction if the vehicle is stuck or in the process of becoming stuck. To apply the E-Lock:

Once engaged, if any malfunction is detected within the locking differential system, the lock will automatically deactivate.

The differential lock system consists of the following components:

When the driver employs the differential lock mode switch, it sends an electronic signal to the differential locking control unit. This unit measures vehicle speed and VDC operation via the ABS actuator and electric unit (control unit), respectively. It also monitors the 4WD shift switch via the transfer control unit.

If the differential lock control unit determines that conditions are met, the differential locking control unit sends power and ground to the differential lock solenoid via the differential lock solenoid relay. This actuates the solenoid which moves the pressure plate against the cam ring. The cam ring and side gear engage, locking the differential. The differential lock control unit activates the DIFF LOCK indicator lamp via CAN communication. By reversing polarity at the differential lock control unit, the differential lock solenoid moves the pressure plate away from the cam ring to unlock the differential.

The E-Lock indicator light will flash until the system is fully engaged. Once the system is engaged, the light will become steady. If conditions are not correct for E-Lock activation, the light will continue to flash until conditions are met or until the system is turned OFF. The indicator lamp can illuminate at any time as long as the ignition switch is in the ON or START position.

Inspect the differentials every 12 months or 10,000 miles (16,0000 km) whichever comes first. If the vehicle is used in dusty conditions, more frequent inspection and maintenance may be necessary. If a vehicle is often used for towing or driven on rough roads, the differential oil should be drained and replaced every 24 months or 20,000 miles (32,000 km), (whichever occurs first).

Checking the Gear Oil Level
To check the level of available gear oil, turn the engine OFF. Next, remove the filler plug and place your finger in the filler plug hole. Gear oil should be level with the bottom of the filler plug hole.

Draining the Gear Oil
To replace the gear oil, remove the drain plug and let the gear oil drain out of the assembly. When gear oil starts to drip, install a new gasket on the drain plug and replace it on the final drive assembly. Tighten to the recommended torque level. Do not reuse the drain plug gasket.

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