The universal joints on the rear drive shaft? Youll have ti remove the yoke straps off of the driveshaft. Make sure to mark front of driveshaft to tranny and rear to rearend that way it is installed again properly.
After that you will need to have the universal joint pressed out. Youcan use a two modified sockets and a vice. Or you can take in teh driveshaft and ahve it done, or rent teh tool to do it.
Then press in new one and put on new shaft.
Tape the univerisals prior to installation remove it this is to prevent the caps from poping off and you needing a new joint.