Raise the rear of the vehicle, support it on jackstands, block the front wheels, and place the transmission in Neutral with the parking brake off. Drain the differential lubricant. Remove the drive axles from the differential. Mark the relationship of the driveshaft to the pinion flange, then unbolt the driveshaft from the flange and suspend it with wire to avoid stressing the center support bearing. On models with an electromagnetic control coupling, disconnect the electrical connector and secure the harness out of the way. Remove the rear exhaust pipe assembly. On Highlander and 2004 and later RX 330/350 models, remove the rear subframe and differential assembly. Support the differential with a floor jack, remove its mounting bracket and bolts, then lower and remove the differential. Installation is the opposite of removal, ensuring all fasteners are tightened to the appropriate torque values and filling the differential with the correct lubricant.