Un believable, I got the new motor today, to replace the one that was wrong, and it too will not work, despite the vendor AP Products' assurances that it would. Apparently these motors have a couple of different gear boxes, and now I know the difference, the black ones, have a threaded bolt to hold the gearbox to the actuator, the silver ones have just a hole. On one web site it showed a Venture motor with a silver gearbox and the Tuson motor, like what I have with a black gearbox. Most of the pictures on-line showing my part number show a black gearbox, mine came with a silver one. It even had a loose bolt, the correct one, in the hole.