Automatic Transmission Control Module problems of the 2010 Dodge Grand Caravan

I bought my Grand Caravan brand new. It is a 2010, I bought in 2011. I have had multiple issues with it. Over the weekend, the traction control came on (perfectly dry roads), the car stalled, I lost power steering, and it wouldn't move until I stopped, put the car in park, and restarted it. This has happened four times now. I took it in for service this morning. I was told they would run diagnostics. If the diagnostics showed it to be a powertrain issue, it would be covered. If not, I would have to pay for diagnostics. After they ran diagnostics, they think it is the pcm. However, they won't fix it because they can't prove it is nothing else or duplicate the problem. They also still charged me for the diagnostics because they can't say for 100% it is the pcm. They told me I would have to continue to drive the car until it happened regularly and I would probably wreck the car in the process. I told them to expect a lawsuit if that happens.