LiftMaster 041A2818 Limit Switch Drive Gear and Retainer you will be able to

you will be able to hear the motor run and see if the screw that is inside the rail is turning

Current Draw - 800mA

2 -  1/2" Inch X 18" Long Solid Steel Torsion Spring Residential Winding Bars

Adjustable light timer option

PPLV1 Remote Control Manual

LiftMaster 041A2818 Limit Switch Drive Gear and Retainer you will be able to041A2818 is a limit switch and drive gear replacement kit that includes; (1) helical gear, (1) E clip, and grease. This kit is compatible with various AC motor drive gear and sprocket assembly kits. Check the manual and for your specific garage door opener model before ordering to ensure compatibility. Also known as 41A2818, 062223