I have experienced an extremely violent vibration/wobbling of the vehicle at freeway speeds on several occasions. During these times, it is very difficult to control breaking, steering the vehicle, making it nearly impossible. I felt very unsafe not only for myself, but also other vehicles around me as I was driving a heavy-duty vehicle on the freeway at a high speed with essentially no control. Although I was shaken up, I was able to regain control of the vehicle and continue on my way. There have been no reports or inspections at this time. Prior to this happening, there were no warnings or messages. This happens twice in 2 days while driving on a long trip. Both times this occurred while driving at 65-70 mph and driving over a small bump in road.

- San Antonio , TX, USA

2014 F350 crew cab w/long bed diesel I parked on sloped driveway with snow under passenger tires. I placed in park but did not set parking brake. Walked away from vehicle and in about 5 minutes the truck rolled down driveway 12 feet. The two drivers wheels were both rolling, I'm not sure if passenger wheels rolled or slid. Why does the transmission (in park ) allow those drivers side wheels to roll" is this normal"

- Salt Lake City, UT, USA

Had a loaded trailer of about 10,000 lbs had truck in four wheel drive, had both feet on brake. Truck was stopped on a decline. Shifted truck to reverse and the brakes failed. The trailer brakes also went out. Truck went over a hill pushed by the weight of the trailer. I believe this has happened 2 other times but one time I thought it was ice and the other it was new and I thought it was my error. Ford refuses to acknowledge the defect unless they can duplicate it.

- Finleyville , PA, USA

Few hours back driving my 2014 F350 Super Duty 6.7 turbo diesel 4X4 platinum msrp about $70,000 dangerously started wobbling after hitting a road bumb at about 48mph. Very dangerous could've resulted in a serious accident. Luckily not much traffic.

- Ashburn Va, VA, USA