Ok. I am now on my third window regulator. I put em in, bolt em up. And they will roll the window all the way up, but wont roll it down. One went about half an inch then stalled, one just straight up dropped the window,, and the last one wont barely move it down at all. Anyone had similar problems? This is really pissing me off, the guy i bought em from was nice enough to send me another one to replace the first one he sent me that wouldnt work. Problem with the regulators or what?