On the drivers side once you pull the axle and carrier out you can drive the seal out with a long extension or all thread etc. through the axle tube. You can use a regular seal driver or socket to install the seal , there is enough room inside the housing to hammer the seal in. The passenger side is out board of the cad. They sell a special tool for it, but I used some 1/2" all thread and large washes to pull it in.