The axle on a Ford Focus is a central shaft with two flexible joints on both ends for a wheel to rotate on. These joints, called CV joints, allow a rotating shaft to transmit power at a constant, rotational speed. There are several reasons to replace an axle. You may need to install a new axle or one or both CV joints have failed. In order to do this, you will have to remove the axle first.
Place your car in park and engage the parking brake. Loosen the lug nuts on both tires in the front with a lug wrench where the axle is located.
Jack up your Ford Focus until the car is off the ground. Lift up the neck of the jack stand and set the brace of the car on top of the jack stand by lowering the jacks. Remove the lug nuts. Loosen the spindle nut with a spindle nut socket and impact wrench. Remove the tires from the stubs.
Brake loose and remove the upper brake caliper mounting bolts with a socket wrench. Do the same for the lower mounting bolts. Then hold and tie the caliper to the coil springs with zip ties.
Pull off the brake rotor from the hub. Pull and remove the cottar pin from the driveshaft nut with the pliers and then unscrew the driveshaft with an impact wrench. Remove the tie rod bolt with a socket wrench and then place the steering knuckle and the wheel hub assembly aside to pull out the axle from the transaxle. To finish, reassemble all the parts.