Set includes 1 drive wheel and 1 worm wheel (complete replacement pair) Key benefits Restores reliable opener performance: replaces worn or damaged gears to recover smooth, consistent drive engagement. Direct part-number replacements: drive wheel replaces part number 41A2817; worm wheel replaces part number 41A4315, making installation straightforward when those parts are required. Reduces downtime and avoids expensive unit replacement by renewing the gearbox components that commonly fail. Function and performance Designed to mesh together as the drive assembly in compatible garage door opener systems, transferring motor torque through the worm to the drive wheel. Exact tooth count and bore dimensions ensure accurate timing and robust power transmission for normal garage door operation. Compatibility Suitable for the following models and systems (exact model strings provided as listed): 13918315SR, 13918415SR, 13918616SR, 13918847, 13918857, 13918869, 13918880, 13953100, 139531006, 13955. 3110, 13953200, 139532006, 13953210, 13953225SRT, 13953225SRT1, 13953300, 139533006, 13953310, 13953315SR, 139533315SR, 13953333. 25, 13, 1953325SRT Garage Door Opener Access System Size and specification Drive wheel outer diameter: 69.8 mm (2.75 inches) Drive wheel bore (inner diameter): 13 mm (0.51 inches) Drive wheel tooth count: 32 teeth Installation notes Replace both the drive wheel and worm wheel together to ensure even wear and proper meshing. Confirm part numbers 41A2817 (drive wheel) and 41A4315 (worm wheel) against your opener’s service manual or the parts you are replacing before installation. Practical use scenarios Replace noisy or slipping gears: when your garage door opener cycles with grinding noise, inconsistent movement, or slipping under load, swapping in this drive/worm wheel set can restore quiet, reliable operation. Field service and repair: technicians can carry this direct-replacement set for quick on-site repairs to compatible opener models, minimizing return visits. Preventive maintenance: during scheduled servicing of older openers, replacing worn gear components can extend the life of the drive system and prevent sudden failures. What to check before ordering Verify the original part numbers (41A2817 for the drive wheel and 41A4315 for the worm wheel) on your existing components or in your opener documentation. Confirm one of the listed model strings appears in your opener’s parts list. This replacement set provides the specific drive and worm wheels required to restore the gear interface in the listed garage door opener systems.