I had this Oldsmobile for a couple of months and it started to do a really hard shift for me. Took it to the mechanic and they had it for three months trying to get it to act up for them and it never did. Each time I got it back it would shift hard on me. Hundreds of dollars later they just replace the whole transmission. That did not fix the problem. I took the car back in for a month and they did a GM upgrade/computer reflash and it fixed the problem. I had to spend nearly 3000. on it. And it is suppose to be reliable. next thing you know the fuel injectors all went bad. this car never stops dishing it out.