I really need help. Bad Steering Problem. Please help.

[LPstroker]

I have a 2003 F250 4X4. At first the steering became hard, it felt like I didn't have power steering at all. So my first move was to replace the power steering pump. I did that and it helped a little, but still felt hard. Then I drove the truck a little while after that and the steering was very hard, but it also started to have delayed response. For example if I was approaching a sweeping right hand corner and went through the corner after I got through it and straightened everything out, there would be a sudden jerk to the right, when I would correct to the left it would be hard then there would be a sudden jerk to the left about 2 seconds after I would correct. This would continue for a little while than stop. So I replaced the steering box, and the lines. Now, when I'm going straight there will be a sudden jerk to the right then a jerk to the left then to the right and it won't stop doing it. I have no idea what it is. The ball joints were replaces in 2009 and I grease them every 3K miles. I don't have mudders on it. Just 265/75/16 General grabbers that I rotate every 3K-4K. By process of elimination I was wondering if it might be the Hydro Boost since it's the only thing I haven't replaced. Please Help. As always it's appreciated.

[LPstroker]

Any Suggestions?

[Turbostang500]

Man I would go through the entire front end and check everything for play or binding.

This may be caused by a loose tie rod end or drag link. Also may be from a loose track bar connection.
As far as I know, the steering shaft is mechanically connected to the steering linkage and the hydroboost is just an assist. I don't think it would cause this issue.

Maybe a tight or binding ball joint (i know they were replaced but that was 3 yrs ago) would cause this also.

Does the truck steering return to the straight position after a turn without you helping it?

[ars5147]

Check the axle shaft U-joints too. I had a similar problem and one was froze in one direction.

[JJFLASH]

I'm with mr Stang. I presume that since you were handy enough to replace the parts you have that you know how to thoroughly inspect your front end, ya?

[JDoldnumber07]

Is it possible the lines were hooked up backwards when you replaced them? I did this once and it took me awhile to figure it out. The problem would even occur without driving the truck, just started the engine and let it sit for a minute then the wheel would jerk left and right real hard. Just a thought..

[LPstroker]

Thanks Guys, I'm going to go through the front end again, I didn't feel anything move, but I'll check again. I re-checked my hoses this morning and all are on in the order they are supposed to be.

[GORILLA BE STROKINNN]

is there any clicking or grinding noises when you turn your wheel? you may not be able to hear it from the inside have a friend (one you trust) turn the wheel while its running and get as close to the steering linkages as you can and see if you hear anything...

[nationfam]

Steering stabilizer??

[LPstroker]

Just wanted to update you guys, It turned out that both front universals were seized, and the pass side hub was broken, even though I drive with the hubs disengaged, the pass side would engage randomly and yank the truck all around. Put new universals on both sides, new wheel bearings both sides, and a new hub assembly on the pass side, and no problems, now. Thanks for all the suggestions.