just restore my 80 vette and put a complet new rubbers kit on the car,i never notice what the windows work like first when i got the car,i just brought it home and tore it apart,now with the new rubbers around the windows i have to open the doors to get the glass right up,with the doors close they go about 3 guarters the way up,have greese and justed everything,could the power motor be weak,they go up very fast,can any help