Did you replace the entire motor assembly including the cables? I'm in the process of (re)doing my cable replacement only. I believe if you pull on one end, it should unravel the spindle, so make sure that you have the cable pulled out all the way. If you are sure that the spindle is completely unraveled, then I would install ONE of the outside cables (perhaps front) to the door pulley in any arbitrary position (with the pulley on the track). Then pull the other (rear) cable as tight as possible and pull the pulley towards the other end. There are two spring tensioners inside the motor assembly that need to get compressed, and this is done from each side. Pulling the rear cable, it will compress the rear tensioner, and pulling the (already attached) door pulley/cable will compress the front tensioner.I tried searching, but couldn't find this answer to this. I replaced the sliding door motor in my 2011 Odyssey because the old one cracked when the cable snapped. I am trying to hook up both cables, but they are about 3 inches too short. How do get more slack or reset the motor so that I can hook both sides up to the door bracket?
Hopefully this will give you enough room to attach the rear cable stop into the door pulley. When I did my cable replacement, I did it the other way, but it was REALLY tight and I certainly needed to compress the tensioners before I could install the spindle.