You have to remove the CAD, and be careful you don't damage the seal. Now is a good time to replace it, but you'll need a special tool. Also there is a black composite bushing in the end of the outer shaft where it connects to the intermediate shaft, keep track of it(make sure it's not loose before you take it out). And after you remove the outer axle, make sure the bearing the intermediate shaft rides in is good. Just grab the end of it with your fingers and see if it moves up and down or sideways. Oh, btw, just wondering why you are replacing it?