Raise the vehicle and support it securely on jackstands. Remove the skid plate, 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. Support the driveshaft with a piece of wire from the underbody. Unbolt the end of the driveaxles from the front differential assembly and support the driveaxles with pieces of wire from the underbody. Drain the differential lubricant. Remove the front crossmember. Support the front axle assembly with a floor jack placed under the differential. Remove the differential and axle tube mounting bolts, then maneuver the axle/differential assembly out from under the vehicle. Installation is the reverse of the removal procedure.