hi all, please help me if you at all can, the driver side rear window was sticking whilst going up and down, so removed the door panel etc and wd40'd the mechanism inside, then the motor stopped so i unbolted it from the regulator...big mistake, the glass slides up and down lovely until i put the motor back in, now it rattles, vibrates, screams, howls....you get the message, window does go up and down just very loudly, have greased and sprayed everything in sight but totally stumped, any ideas gratefully received. cheers