A headlamp adjustor which includes an adjustor output shaft that is engageable with a reflector of a headlamp assembly. The adjustor output shaft extends from a housing, and a worm gear generally in the housing is spur gearably engaged with the adjustor output shaft. Drive structure is engaged with the worm gear such that actuation of the drive structure causes at least a portion of the drive structure to thread into at least a portion of the worm gear, thereby causing the adjustor output shaft to translate relative to the housing and adjust the position of the headlamp reflector.