Firstly, lift the rear of the vehicle and use jackstands to support them and turn the front wheels and set the parking brake, likewise, engage the transmission on the Neutral. Next, move around the car and crawl under it to check the outer surface of the car driveshaft; Whereby, if there are any form of dent or crack, then the Shafts needs to be replaced. From the transfer case connection one has to check for leakage at this end because this is commonly caused by a bad seal while at the
Differential end if one observes leakage then there is a common problem with the pinion seal. As an assistant turns a rear wheel, look for the universal joints without wobbling, squeaking, or looseness, carefully listening for any coming from the middle bearing; The rubber part should be checked for cracks or their separation. The universal joints can be checked without the driveshaft being in motion, by attempting to twist the joint; any sideways movement is indicative of severe wear and there will usually be movement if the shaft is lifted; in such a situation the driveshaft assembly will require replacement. Last but not the least, make sure that the drive shaft mounting bolts are well tightened. To remove and install the differential, again jack up the rear of the vehicle and support with jack stands, and chock the front wheels. While in this position and with the transmission in Neutral and with the parking brake off, one can make reference marks on the flanges of the both driveshaft and the differential pinion for realignment whenever the two are to be re-positioned. Loosen and take out the bolts holding the centre support bearing and slowly drop it, remove the rear universal joint flange nuts and the washers and rotate the driveshaft in order to gain access. Then it is necessary to unscrew and take off the nuts and washers of the transfer unit output shaft flange in the same way as before and finally the driveshaft. Reinstallation is an inverted process of the removal where the driveshaft is connected to the flange of the transfer unit next to the differential flange; it is positioned well to fit the marks and the fasteners are tightened. Last but not the least, place the center support bearing bracket on the floorpan and then fasten the bolts.