Upgrade Aluminum Alloy Drive and Worm Gear Kit for LiftMaster Craftsman Chamberlain Garage Door Opener | Replaces OEM 41A2817 41C4220 41C4220A | Fits 1/3 & 1/2 HP Chain Drive Models 1984‑Present
US$9.60
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US$9.60
Price when purchased online
Free shipping
Free 30-day returns
Sold and shipped by isc2chapter-liny.org
Free 30-day returns Details
Product details
| Management number | 247386138 | Release Date | 2026/08/16 | List Price | US$9.60 | Model Number | 247386138 | ||
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- Precise OEM Fit for Chain‑Drive Openers Only: Direct‑fit upgrade replacement drive and worm gear kit compatible with LiftMaster, Chamberlain, Craftsman, Master Mechanic, Garage Master, Wayne Dalton, and Frantz garage door opener access systems. Replaces OEM part numbers 41A2817, 41C4220, 41C4220A. Designed exclusively for 1/3 HP and 1/2 HP chain‑drive models manufactured 1984–present / post‑1993; NOT compatible with belt‑drive openers—verify your opener type and OEM label before purchase to avoid returns.
- Upgrade Aluminum Alloy vs Factory Plastic: Engineered from CNC‑machined aluminum alloy instead of standard nylon/plastic drive gears. Delivers superior wear resistance, higher load capacity, and longer service life under repeated door cycles. Anodized surface treatment provides corrosion resistance and smooth meshing with the worm gear, reducing friction noise compared to OEM plastic gears that commonly shear or powder over time.
- Wide Brand & Model Coverage: Compatible with Chamberlain models 1100, 7200, HD620EV, WD832KEV, PD100‑PD752 series and more; Craftsman 139.xxx SR / SRT / DM series including 13953615SR, 13953910, 13953914, etc.; LiftMaster 1040/1045/1050/1055/1060/1240/1245/1250/1255/1260/1345/1355/2245/2255/3265 and related; plus Wayne Dalton 41A2817/41C4220, Frantz 125‑4F/325‑4F/525‑4F, Garage Master 140GM/1245GM/1255GM, Master Mechanic 551‑4MM/501‑4MM/141‑4MM. Full model lists in description.
- Complete Rebuild Set & Easy Install: Kit includes aluminum alloy drive (helical) gear, worm gear. Matches factory bore size (½″ shaft, 2¾″ gear diameter × ½″ width) for straightforward teardown using standard hand tools—no special punches required. Follow opener manual for motor disconnect and chain tension reset; DIY‑friendly 30‑minute repair that restores door movement without replacing the whole opener.
- Quiet Operation & Risk‑Free Support: Precision‑cut teeth minimize chatter and humming motor symptoms caused by stripped plastic gears. Ideal fix for openers that hum but door doesn’t move, or chain slips/drives unevenly. Backed by responsive seller support—contact us with your opener model photo if unsure about fitment; we’ll confirm compatibility before you install.
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