Craftsman/Chamberlain/Liftmaster...GEAR SWAP (start to finish)

Craftsman/Chamberlain/Liftmaster...GEAR SWAP (start to finish) from youtube by All-Pro Quality Garage Doors Inc.
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This gear swap video explains and shows a Craftsman/Chamberlain/Liftmaster gear swap start to finish. It's not as hard as you might think...C'mon...give it a try!! The worst that can happen is you end up calling a pro to finish the job, but should you succeed, then you saved a ton of money!!
Part #41C4220A