Engine Noise problems of the 2007 Ford Freestyle

Started making noise like a helicopter. Then it wouldnt change out of gear. It is showing the wrench and the engine light on. Will not shift to different gears at all. I have 4 grandchildren that live with me and that rely on me to get them to dr appts, school, and other places. I also have a pregnant daughter that has had to rely on other people to get to her drs appts. I am very disappointed in the quality of this car. I would not recommend this care to anyone else.

This is the 2nd time my 2007 Freestyle has started lunging. It will lunge in drive or reverse. Starts out with small lunges but the lunges get bigger. Then I find that it will lunge so hard I need to slam on the brakes. This causes the engine to stall. It is very difficult to drive upon restart. First experienced the lunge problem in may, 2009. Took to dealer mechanic next day and was diagnosed as faulty throttle. Replaced the throttle and now I once again have the same problem. Replacing the throttle bottle didn't solve the problem. I also have had an issue with my a/c and a broken engine mount. Not trusting the Ford dealer mechanic, I took it to a third party. The parts alone were $1000. 00 because they could get them from Ford only. Total cost to replace compressor and fix engine mount $2200. You can't drive in the hot arizona summers without ac. The lunging seems to get worse with the ac on and when turning the wheels. My first experience in 2009 and this one happened while starting to back out of parking spot. Had ac on and cramped wheels to back out. As I eased by foot off the brake, the car just shot back almost hitting the vehicle behind me. Slammed on brakes, car still tried to back up then stalled. The engine sounds like I have my foot on the brake and gas at the same time. Racing and high rmps. Taking back to dealer today.