Owners/service Manual problems of the 2008 Jeep Compass

My husband was driving the speed limit which was 70mph. All of a sudden the car slowed down to 40mph. It would not go any faster. He even tried to give it a little more gas but it still would not go any faster. Then it slowed down to 35 then 30. There was nothing you could do. It sounded like the transmission would not shift. It sounded like it was in a lower gear and would not shift to a higher gear. The car then started to over heat. We opened the sun roof, rolled down the windows and turned off the ac. We even turned the heat on as recommended in the manual but no luck. We ended up having to stop. On the interstate this was horrible. I thought we were going to be hit from behind. People are going to fast and even though your in the right lane they don't slow down but try to go around you. It's the people who can't get over into the left lane and just about run over you that is terrifying. We were told by the Chrysler dealership that this happened to the Jeep Compass all the time. Sometimes 1-2 times or 2-3 times. They will diagnose the problem and fix it. How can you fix something after its run the transmission so hard? my thing is put a new transmission in it and whatever else it needs new. We have a bumper to bumper warranty and I can bet we will be charged something. Who is to say it won't happen again, or when my grandchildren are with me? I wish I had known about this problem with this Jeep I personally wouldn't have bought it. It has already been paid off and darn, look what just happened. I would like to know how many other people have had this same problem and how many times and what was done about it.