Seeing as it's the 3.4, may want to post in that engine section as well. May get some additional exposure.
For the trans., when was the last time a fluid/filter change was done on it? If it's been a while (or never), then I'd drop the pan, clean it out, change the filter and refill. How's the fluid level? Is it nice and red, or brown/black? Wipe the dipstick on a white towel to check the color.
The master switch can cause all the windows to not work. Might be time to pull the door panel and check for power at the connection to the motors. If you have power, then I would think the motor is toast.
