i have a 91 f150 xlt lariat, 5.8l. I had to make a hard turn in reverse over a curb. The steering wheel was pulled as far as I could to the right. I got over the curb, but when I did the steering felt off, like it was stiff while turning right. I went straight home and just as I pulled in I completely lost power steering. I just got the truck a month a go, don't see anything visibly wrong, but I'm new with these things. The person I bought it off said there was a very minor power steering leak but there's still plenty of fluid. I should note the steering was pretty loose before this happened and owners previous mechanic recommended to replace the steering gear box, if that makes a difference.Any ideas? Thanks!
Update: I did let the car sit for an hour and the power steering worked again for about 5 minutes before failing again. Just FYI in case that helps.