2- take loose lower ball joint at steering knuckle so you can separate knuckle from ball joint. You'll need a joint separator to do this. After loosing the bolt/nut place the separator between the knuckle and ball joint hit the tool with a hammer til the joint pops free.
3- remove axle nut.
4- pry down on the lower control arm until the ball joint is free from the knuckle now the axle should slide free from the spindle.
5- place a pan under the inner joint to catch any fluid that may spill out when removing the axle.
6- pry in between the inner joint and transmission to free the axle and remove the axle.
7- place new axle in transmission, make sure the axle is in all the way. To do so try pulling on the inner joint if it doesn't slide out the the clip is snapped in place.
8- slide the spindle over the splines of the axle. Use a pry bar to pry down on the lower control arm have a helper to help align the ball joint back through the knuckle. Tighten the knuckle to the joint and reinstall any cotter key if any were present. Before you began.
9- tighten down the axle nut. And reinstall the wheel.