In an adjustable foot pedal assembly for a vehicle, a brake pedal is supported on a carrier, which is adjustable fore and aft. A brake valve has a valve body fixed relative to the path of carrier movement, and a plunger movable in a direction transverse to the path of carrier movement. A transfer arm, pivoted on the carrier, is operatively connected to the foot pedal and the plunger, for effecting movement of the plunger in response to depression of the foot pedal so that the relationship between the movement of the foot pedal and the responsive movement of the plunger is independent of the position of the carrier. The brake valve does not need to be moved as the pedal position is adjusted, and the brake pedal characteristics are therefore unaffected by adjustment of the position of the pedal.