An adjustable vehicle pedal assembly is disclosed. The adjustable vehicle pedal assembly may include a tray sub-assembly and a push rod sub-assembly. The tray sub-assembly may include a vehicle pedal, a splined shaft, and a tray that is slidable, relative to the splined shaft, to permit a position of the vehicle pedal to be adjusted. The push rod sub-assembly may engage a valve based on actuation of the vehicle pedal. A mechanical linkage between the tray sub-assembly and the push rod sub-assembly being maintained when the position of the vehicle pedal is adjusted.