GMC 52117734 Case, Diff

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Disconnect the cable from the negative terminal of the battery. Loosen the front wheel lug nuts, raise the front of the vehicle and support it securely on jackstands. Remove the under-vehicle splash shield. Drain the front differential lubricant. Disconnect the front driveshaft from the front differential companion flange. Wrap tape around the bearing caps so they don't fall off. Support the driveshaft with a length of wire or rope so it doesn't hang. Remove the front driveaxles. Disconnect the electrical connector from the front axle actuator motor. Disconnect the breather tube from the differential housing. Place a jack beneath the differential carrier. Unbolt the carrier-to-frame brackets, removing the bolts to the carrier and the bolts securing the two brackets to the frame. Carefully lower the differential, using a chain or straps to secure the differential to the jack. Installation is the reverse of the removal procedure. Tighten all fasteners to the proper torque values. Tighten the wheel lug nuts to the specific torque. Refill the front differential with the proper lubricant.

After removing the front driveshaft and lower control arm crossmember, you should detach the driveaxles from the axleshaft flanges and suspend them with wire.

Drain the front differential lubricant.

After draining the lubricant, you need to remove the front driveshaft and lower control arm crossmember.

After removing the wheels, you should drain the lubricant from the differential.

To remove the differential carrier from under the vehicle, you should lower the jack and guide the carrier out.

After removing the wheels, you should drain the lubricant from the differential.

To reinstall the front differential, you should reverse the removal steps, tighten all fasteners to the proper torque values, and refill the differential with the correct lubricant.