Ford F2AZ-4234-B Shaft Assy - Rear Axle

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To remove the rear axle assembly, first disconnect the negative battery cable and raise the rear of the vehicle, securely supporting it on jackstands. Loosen the rear wheel lug nuts, block the front wheels, and remove the rear wheels. Then, proceed to remove the brake drums or calipers and discs as needed. Drain the lubricant by removing the rear axle cover and remove the ABS sensors if the vehicle is equipped with ABS. Next, take out both rear axleshafts and free the ABS sensor wires, parking brake cables, and brake lines from their clips. Remove the four bolts attaching the brake drum backing plates or torque plates to the axle housing and wire them out of the way. Unbolt the driveshaft from the differential companion flange and move it aside. Place a floor jack under the differential, raise the rear axle slightly, and secure the coil springs or disconnect the air springs. Remove the shock absorber lower mounting bolts, upper suspension arm-to-rear axle housing nuts and bolts, and disconnect the height sensor if applicable. On 1998 and later models, there are four axle-locating arms plus a Watts-linkage assembly mounted above the differential connected to two lateral arms. Lower the axle housing until the coil springs are fully extended and remove them or the air springs if present. Finally, guide the axle housing out from underneath the vehicle. To install the rear axle assembly, reverse the removal steps, ensuring proper torque and attachment of all components, including suspension arms, shock absorbers, driveshaft, brake backing plates or torque plates, and axleshafts. Fill the differential with the recommended oil, install the wheels and lug nuts, lower the vehicle, and tighten the lug nuts to the specified torque.

Raise the rear of the vehicle and support it securely on jackstands.

For installation, raise the rear axle assembly into place and secure it with upper suspension arm-to-axle housing bolts and nuts. Install the coil or air springs and connect the lower suspension arms. Raise the axle housing to normal ride height, tighten the upper and lower suspension arm-to-axle housing nuts. If applicable, reattach the height sensor for air springs.

Rotate the differential case 180-degrees and slide the pinion shaft out until the stepped part of the shaft contacts the ring gear. Push the outer (flanged) end of the axleshaft in and remove the C-lock from the inner end of the shaft, taking care not to damage the O-rings in the axleshaft grooves during C-clip removal.

Avoid rotating the differential while the pinion shaft is out to prevent the pinion gears from falling out.

Start by disconnecting the negative battery cable, loosening the rear wheel lug nuts, and raising the rear of the vehicle using jackstands under the frame. Proceed to remove the rear wheels.