Are you sure the motor is bad ? Iv'e never had a garage door opener apart (althought I'd jump at the chance) but over my 31 years I've found more than a couple "motors that were bad" turn out to be a bad connection inside the unitsomewhere.

YMMV

-John

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2009 Kia Sedona
2009 Honda Odyssey EX-L
12006 Jetta Pumpe Duse
(insert Mercedes here)

Husband, Father, sometimes friend =)