I just bought a used, but tested and working motor for my top on ebay. I installed the motor. It spins, but the top doesn't move. I manually raised and lowered it while my original was out of commission. would this have anything to do with it not moving, I think it must be low on fluid, but do not know where to add more. Do you think this is the problem?? If not, what does it sound like, or where do I add more Dexron II if that will resolve the problem?? Please help!! Thanks a lot.