You have to have a special socket to get the axle nut off. I guess it's not special it's just larger than most people have on hand. Then you have to get the hub unit to install. Disconnect the ABS wire, remove 4 or 6 bolts that hold the hub unit on. Pull hub off axle & out of front housing. With some, you have to disconnect one of the ball joints & maybe a steering tie rod. Install in reverse. It took me most of a day, W/ everything going good. GOOD LUCK!!!!!!