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<blockquote data-quote="inactive" data-source="post: 1340420" data-attributes="member: 7488">Pretty much all the craftsman, liftmaster, and chamberlain belt and chain drive use that same worm drive setup.&nbsp; They all come off the same line.How big and heavy is your door?&nbsp; Usually keeping lithium grease on the gears, and keeping the door wheels and trolley lubed will allow the gears to last a long time.&nbsp; Did you ever try open the door if it was frozen (literally) shut, or had ice on it?&nbsp; The gear is an engineered weak link, to keep other items from breaking.&nbsp; Of course, those weak links often fail prematurely.Also if you garage gets pretty cold, it drastically decreases the lifespan of the gear, due to the composition of the plastic.Just some food for thought.&nbsp; I sold parts for these things for several years.&nbsp; I bet your new one it pretty much the same, mechanically.&nbsp; The remotes and security features may or may not be different.</blockquote>

[QUOTE="inactive, post: 1340420, member: 7488"] Pretty much all the craftsman, liftmaster, and chamberlain belt and chain drive use that same worm drive setup. They all come off the same line. How big and heavy is your door? Usually keeping lithium grease on the gears, and keeping the door wheels and trolley lubed will allow the gears to last a long time. Did you ever try open the door if it was frozen (literally) shut, or had ice on it? The gear is an engineered weak link, to keep other items from breaking. Of course, those weak links often fail prematurely. Also if you garage gets pretty cold, it drastically decreases the lifespan of the gear, due to the composition of the plastic. Just some food for thought. I sold parts for these things for several years. I bet your new one it pretty much the same, mechanically. The remotes and security features may or may not be different. [/QUOTE]

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