Its as simple as unbolting one and bolting in the other of coarse you may have to do one of a few things cause if my memory serves me correctly the yoke on the 3/4ton is larger then the yoke on the 1/2ton so you have to either swap a smaller yoke into the rearend or buy a new driveline to fit you can also get u-joints that are two different sizes but I would not suggest using them. Then if its 4wd you have to make sure that your front and rear diff gears match. good luck hope this helps!