If you have a bad shift solenoid, DO NOT DRIVE THE CAR!!! The shift solenoid may get you around but only for a limited time. It could actually go out at any time. Your best bet is not to drive the car at all...not even to the dealership or repair shop. Not only can this leave you stranded, but could cause an accident on the hiways or city streets. Think safety first. I would have the car towed to your mechanic rather than drive it there, if at all possible.