This is a replacement Basic Drive and Worm Gear Kit. For use with various 1/2HP LiftMaster® and Chamberlain® Chain Drive Garage Door Openers; manufactured after 1993. Complete kit includes: helical gear, wear bushings, worm gear, grease, and hardware needed to replace the drive gears.

Important Note: Top hat assembly and bearings are not included in this kit, and must be rebuilt utilizing the packaged components. Check the manual or replacement parts diagram for specific part information before ordering to ensure compatibility.

Genuine LiftMaster® replacement part.