Power Train Driveline problems of the 2007 Subaru Outback

My Subaru legacy Outback bucks, surges when going on any small or big incline. It occurs all the time. It tends to make me slide more cause of the surges especially when icy or wet. I took it in 3 times to a dealership to fix the problem before the warranty ran out. They told me that they were aware of the 07,08's having this problem. It was in the computer/electronics. They did nothing to fix it. I see that Toyota is having problems and ignored this problem. So is Subaru. It is a computer defect that Subaru said they would eventually fix. It was the computer hooked to the driver's pedal and gas. I sent letters to the main Subaru office, talked to the dealership. I didn't know where to go after this.