Lincoln 7L1Z-3219-A Shaft - Front Axle

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If the vehicle is equipped with air suspension, turn off the air suspension system. The switch is located in the area of the right kick panel. Loosen the wheel lug nuts, raise the front of the vehicle and support it securely on jackstands placed under the frame. Block the rear wheels to keep the vehicle from rolling off the stands. Remove the front wheels. Remove the front driveshaft. Disconnect the front driveaxles from the axleshaft flanges. Disconnect the vacuum lines from the vacuum shift motor. Disconnect the vent hose from the front axle tube. On 2005 and later Expedition/Navigator models, remove the four bolts and remove the front crossmember. Position a jack under the front axle differential case. Remove the front carrier bushing bolts. Remove the four front differential support bolts. Remove the front differential support. Remove the right axle tube bushing bolt. Remove the differential cover bushing bolt. Installation is the reverse of removal. Be sure to tighten all fasteners securely.

The lock bolt from the differential pinion shaft.

Tighten the U-bolt nuts to the specified torque.

After removing the front skid plate, the front driveshaft needs to be disconnected.

To remove the axleshaft, you push the outer (flanged) end of the axleshaft in and remove the C-lock from the inner end of the shaft. Then, you withdraw the axleshaft, being careful not to damage the oil seal in the end of the axle housing as the splined end of the axleshaft passes through it.

For these models, additional steps include removing the rear driveshaft and driveaxles, spare tire, differential vent hose, and vehicle speed sensor connector.

Before removing the driveaxle, remove the cotter pin and nut lock, and use a prybar or screwdriver to hold the driveaxle while loosening the hub nut. Remove the nut and washer, followed by the driveaxle flange bolts, marking the relationship of the inner CV joint to the flange.

The differential is offset to the left, requiring a longer axleshaft on the right side to maintain equal lengths.

The axleshafts are splined to the differential side gears.

Swing the knuckle/hub assembly out (away from the vehicle) until the end of the driveaxle is free of the hub.

After turning off the air suspension system, you should proceed by loosening the rear wheel lug nuts.

The axle identification tag is usually located on the differential cover or the inner end of the right axle tube.

Turn off the air suspension system.

After securing the vehicle, the next step is to remove the rear wheel and brake drum or disc.

Before removing the driveaxle, remove the cotter pin and nut lock, and use a prybar or screwdriver to hold the driveaxle while loosening the hub nut. Remove the nut and washer, followed by the driveaxle flange bolts, marking the relationship of the inner CV joint to the flange.