Driver's window stopped on this LX 4-door. Switch wouldn't do anything. If I hold the switch up or down and give the window a tug, it will continue to the top or bottom. Is this the motor going out? If so, I see that they list for almost 0 and retail for a bit over 0. Can these be rebuilt? Anyone done this? Are brushes easy to replace on these? How tough is the motor and regulator to get out of these cars?