ACL prevents:
Anterior cruciate ligament (ACL) prevents posterior displacement of femur(PDF) on tibia and the anterior displacement of tibia on femur, as well. Posterior cruciate ligament- prevent anterior displacement of femur on tibia and the posterior displacement of tibia on femur, as well.
Anterior dislocation of femur
Posterior dislocation of tibia
Lateral dislocation of tibia
Posterior dislocation of femur
Bones Joints and Ligaments