Hello, I have a 1999 Chevy Cavalier that just had a transmission problem. It's a 4 cylinder, Automatic, standard model, no power options. The car would drive in 1st gear up to 25 mph, and would never change gear, only get louder. Obviously it's a transmission problem. How much should I look to be paying. Parts & labor to have this job done? Also, the mechanic that's doing the job ripped off a friend of mine once because she was a female. She also had to have her transmission rebuilt, and she told me that instead of them rebuilding it, they replaced hers with one from a junkyard. She had problems with it after, and only got them to cooperate after threatening to get a lawyer. They also tried telling her it wasn't the transmission, and then attempted to charge her by saying it was something else. After replacing it, the car would take 2 seconds for the speed to kick in after accelerating, and when putting it into reverse, the car would shake upon acceleration. Is this due to poor work done rebuilding it?