I have a 2005 F350 Lariat Super Duty, crew cab, 4X4, long wheel base.
I was driving and lost all brakes and steering at a busy four way stop. Lucky it was 4:00 A.M. no traffic was out because I blew thro red light. investagated first then replaced pump. Steering was good for a very short time brakes did not improve. I replaced hydroboost, was pulling out for test drive and lost brake pedal. Got out and found a brake pad on the ground next to my rear tire. (No prior brake problems or noises to indicate problems.) I replaced rotors and pads bled all brakes again.(First time was when I replaced hydroboost bled steering and brakes.) I have better brakes than when I first bought my truck a year ago. steering is still no good at all I can barley turn the wheel moving at a stop its impossible and I am not a small guy. I checked for leaks everywhere thro the brake and steering system all looks good. I bled the steering again by jacking front of truck off ground, pulled the return line to the hydroboost and turned side to side for a good ten minutes. No changes.????????????????? I am thinking another pump since it was great for a min after replacing first time???? SUGGESTIONS PLEASE!!!!

 

Drop the arm of the gear box, put the fron axel on stand and see if the steering binds by hand when turning the tires by pushing /pulling on them.. Sounds like a bad gear box more then anything.