Transmission Gear Slipping problems of the 2009 Ford Escape

The transmission is slipping and wining. Like a bearing is going out. I think it is the output shaft bearing.

2009 Ford Escape XLT v6 with automatic transmission. While driving the vehicle at highway speeds (50-70 mph) the transmission slips into neutral. This first occurred when the vehicle was 7 months old (Jan 2010) it was taken to the dealership and the transmission was replaced, according to the service department at the dealership, with a brand new transmission. A couple of months later the same problem resurfaced and the vehicle was again taken to the dealership where it stayed for over a week. The service advisor informed us that there was a bad module in the transmission and that once it was replaced the problem would be solved. The vehicle came out of the dealership supposedly "repaired", however, two days later the same exact problem happened with the transmission slipping into neutral when driving on the interstate. We live in washington DC and have to take the washington beltway and interstate 95 every day to get to work and this issue with the transmission is just a serious accident waiting to happen. This vehicle is not safe to operate!.

While travelling at highway speed, transmission slips to neutral (or low gear) and rpms shoot up to near 6000. Forward momentum slows dramatically which is quite hazardous on highway. Got to dealership right away and within day they "fixed" it by replacing a seal (diagnosis was low fluid). Expressed concerns for safety and was told it is fixed and it is safe. Next day the exact same thing occurs! in addition to that same problem occuring, also now shifting is occassionally very hard especially when acceleration is harder like merging onto highway or passing another car. Bringing vehicle back in but don't have my hopes up right now.