Mopar 4137672 Rear Drive Shaft

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Raise the rear of the vehicle and support it at the front of the rear springs so the rear wheels just clear the ground. Using a wooden block, support the brake pedal in the up position. Remove the wheels, and for full-floating axles, also remove the axleshafts and brake drums. Disconnect the brake hose at the T-connection and plug both ends to prevent loss of fluid. Disconnect the parking brake cables and the driveshaft at the differential companion flange. Remove the shock absorbers along with the spring U-bolts and nuts, noting the positions of any tapered shims installed between the rear springs and axle to ensure they are reinstalled correctly. Finally, remove the axle assembly from the vehicle, and during installation, follow the reverse order of removal while ensuring to bleed the brakes.

Install a new O-ring on the shift motor, then reinstall the shift motor in the disconnect housing, ensuring the shift fork offset is toward the differential, and secure it with E-clips.

Use a tie-rod puller to disconnect the tie-rod from the steering knuckle, disconnect the drag link from the steering knuckle arm, and remove the nuts and upper knuckle cap from the steering knuckle arm.

The Spicer 44 axle is utilized on 1/2 ton and standard 3/4 ton vehicles.

You can loosen the tapered dowels by rapping the axleshaft sharply in the center of the flange with a hammer.

Disconnect the front driveshaft.

Vehicles may utilize either semi-floating or full-floating axleshafts. Typically, trucks with a Gross Vehicle Weight (GVW) below 7000 pounds have semi-floating axleshafts, while those above 7000 pounds use full-floating axleshafts.

Use the inner end of the axleshaft to pry the oil seal from the end of the axle housing, noting that a new one must be used during installation.

Install the retainer nuts, tightening the lower one first, and back off the threaded adjuster before installing the right-hand axleshaft.