Nissan 39204-0W050 Shaft Sub Assy-Front Drive

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Overhauling the differential is not typically a cost-effective endeavor for a do-it-yourselfer. Instead, any further work involving the differential should be entrusted to a qualified repair shop with the appropriate expertise and equipment.

After adjusting the snap-ring, install the free-running hub assembly, install the wheel and lug nuts, lower the vehicle, and tighten the lug nuts. Ensure the vehicle is safely lowered and the lug nuts are adequately tightened.

Raise the vehicle and support it securely on jackstands, then detach the vent hose from the differential housing. Mark the relationship of the driveshaft to the differential companion flange, then unbolt the driveshaft from the flange and support it with a piece of wire from the under body. Unbolt the inner ends of the drive axles and support them with pieces of wire from the under body. For Frontier and Xterra models, support the engine from above with an engine hoist or an engine support fixture, unbolt the engine mounts and raise the engine for clearance. Support the front axle assembly with a floor jack placed under the differential, then unbolt the differential and axle tube mounts from the front suspension cross member and remove the bolt from each end of the differential mounting member. For Pathfinder models, support the front axle assembly with a floor jack placed under the differential, then remove the mounting bolts from the support brackets at either end of the axle/differential assembly and slowly lower the assembly and remove it from under the vehicle. Installation is the reverse of the removal procedure, tightening the mounting fasteners securely, the driveshaft and drive axle fasteners to the torque and checking the differential lubricant level and adding some, if necessary, to bring it to the appropriate level.

After raising and securing the vehicle, remove the rear wheels. Position a jack under the rear axle differential housing. Proceed to disconnect the driveshaft from the rear axle pinion flange. Disconnect the shock absorbers at their lower mounts. Also, disconnect the vent hose from the fitting on the axle housing and secure it out of the way. Unbolt the brake line fittings from the brake hose junction block, and then remove the brake hose junction block from the axle housing, plugging the hose to prevent fluid leakage. Don't forget to disconnect the ABS wheel speed sensor electrical connector(s).

Proceed by removing the wheel, brake drum, and brake shoes. Disconnect the parking brake cable from the lever on the trailing shoe and unbolt the cable casing from the backing plate. Additionally, disconnect the hydraulic line fitting from the wheel cylinder.

If a drive axle boot is damaged, the CV joint can be disassembled and cleaned. However, if any parts of the CV joint are found to be damaged, the entire drive axle assembly must be replaced as a complete unit.