The Kwikee Motor Conversion Kit upgrades the motor on Kwikee 28, 31, 37, and 39 series electric RV entry steps. This improved, fully sealed gearbox has zinc-plated linkage and a high-torque motor. The kit includes the control unit, switch kit, and hardware.• Upgrades components on your Kwikee powered step to the configuration of steps manufactured after 1999• Includes motor, linkage, control unit, switch kit, and hardware• Fits step series 28, 31, 37, and 39• Integrated motor, gear box, and "C" linkage have increased performance, reliability, and longevity• Motor has 40% more torque than models manufactured before 1999• Fully sealed gearbox with brass ball bearing ensures consistent alignment• Control unit wires to RV to automatically extend and retract steps when the door is opened and shut• Default mode links steps and step light (sold separately) to the opening and closing of the door• Ignition override safety feature retracts steps when the vehicle's engine is started• Switch kit allows you to override automatic retraction and lock steps in extended position• Mounts to door and door frame and stops retraction when they touch• Keeps the steps out when parked, whether the door is open or closed• Durable steel construction is zinc-plated for strength and corrosion-resistance• Simple installation with cotter and clevis pins, pigtail fasteners, and included hardware• Includes screws, washers, and nuts• Made in the USA Includes motor, linkage, control unit, switch kit, & hardware Has 40% more torque than models manufactured before 1999 Durable steel construction is zinc-plated for strength & corrosion-resistance | Kwikee Motor Upgrade Kit for 28, 31, 37, and 39 Series Electric RV Steps Made in USA