The torsion bar on your Ford F-150 4WD truck is an integral part of your truck's suspension system. If the torsion bar malfunctions or is damaged in an accident, you can easily replace it with a new one in a little over an hour. The torsion bar is contained underneath the truck so you will need to raise the F-150 to access the torsion bar.
Loosen the front wheel lug nuts with a socket wrench and raise the F-150 with a jack.
Place the puller tool on the torsion bar adjuster arm. There is a small dimple on the center of the arm. That is where the puller tool should be installed.
Rotate the puller bolt until all of the tension is removed from the torsion bar adjuster arm. Remove the arm nut with a socket wrench, then remove the puller.
Pull the torsion bat forward, through the lower control arm, and remove the torsion bar adjuster arm.
Pull the torsion bar out from the underside of the F-150. You may need to wiggle it a bit to get it completely out. Once the torsion bar is removed, install a replacement if necessary, then reattach the torsion bar adjuster arm and the wheels, then lower the truck.