Power Steering Pump problems of the 2012 Ford F-250

I was driving the speed limit of 65 mph on the interstate, when the truck went over a rough spot in the road and began to shake uncontrollably. I could not steer do the the steering wheel and the front of the truck shaking so violently. I managed to get the truck slowed down quickly and over onto the median. I stopped and got out to check around and under the vehicle and found nothing. As I attempted to get up to speed and merge back onto the highway the truck started shaking again. After getting up to about 50 mph it smoothed out. I took the truck to discount tire and had the wheels rebalanced and the front checked with no problems noted. The truck has done this about 4 or 5 more times since and it always after you go over a rough spot in the road. The vehicle shakes so bad that you cannot control it and you have to stand on the brake to slow it down enough to be able to steer it. This can result in a major accident or death!!! I have also had problems with the transmission since the truck was new. When it shifts from 1st to 2nd sometimes there is a long delay where the throttle is pushed down and the truck does nothing for approximately 5 seconds, this has occurred numerous times in intersections and can cause you to be struck in the side. I have had the truck to the shop 3 times and they changed the transmission body and the transmission pump and it still continues to have the problem. . .

I was safely operating my Ford f 250 on a concrete bridge in pine island florida . I was traveling @ 63 mph and was making a slight left bend . The truck crossed an expansion joint and went into uncontrollable violent oscillation of suspension and steering . The oscillation was such that the steering wheel was difficult to hold on to and my first thought was multiple flat tires or a wheel came off the vehicle . Hard braking to under 30 mph was what was required to stabilize steering to "normal" . That was the first time this occurred and I discussed with my service adviser at the Ford dealership that I purchased the truck from. I inspected vehicle and could see no damage of obvious problems . I monitor tire pressure regularly , have no modifications to suspension or steering on vehicle . The next time this occurred 12/26/13, I was traveling approx. 65 mph and again was in a slight left hand turn and crossed an expansion joint near birmingham alabama on highway 65. I was surrounded by dense 65 mph traffic and the truck was uncontrollable. This time there was a near accident as I has a semi tractor trailer both close behind me and to the right side of me . Once again I had to brake rapidly to avoid crossing lanes putting my family at risk of serious accident . This is a hazardous condition and the dealer has no explanation. The force is violent enough that it could easily damage parts of the truck . As a side note , the fuel pump came apart and slung metal fragments throughout the fuel system in truck within one hour of the violent oscillation.