Shop 4WD and transfer-case actuators built to restore reliable shift performance between 2WD, 4WD, and Hi/Lo range. These electric and vacuum-driven actuators control the shift fork inside your transfer case, and a failing one is a common cause of 4WD warning lights, grinding shifts, or a transfer case stuck in one range. Find durable replacements for trucks, SUVs, and 4WD/AWD vehicles to get your drivetrain shifting smoothly again.