Power Stering Pump Going Bad
 

I have a 2000 Ford F250 psd and im pretty sure the power steering pump going bad. when im driving it will get stiff at the steering wheel and will start to jerk left and right when driving. its really unsafe the way it's jerking so what would the best brand be and any instruction on changing it my self. thanks

Powersteering pump would not cause a change in how it steers, not as far as a jerking motion...

I would look at ball joints and steering linkages.

valve problems in the steering box is also a possibility

Thanks for the reply. When i'm parked the steering wheel turns easliy. When i start driving the steering will gets slightly stiff and will jerk left then right a couple of times then stop. It sounds like my powersteering pump makes a loud whinning noise when this happens. i checked the levels and it was fine. so you think its the steering box valves. are they easily to change or should i say is the steering box easily changed.

The hardest part of changing the steering box is getting the pitman arm loose from the shaft. Some auto parts stores have a tool rental program and with the right puller it is not too bad.

every time i've tried using the auto parts stores' puller tool. it doesn't fit. i end up with 2 buddies, 4 pry bars, and ripping the vice off of the bench, and a lake of fluid on the floor.

see my truck is doing the opposit of urs, i cant turn the wheels while the truck is sitting still but when rolling it turns fine,

well we have 1 of 2 problems. the steering box or steering pump. how do we know which one has gone bad. are they a way to tell.

i always thought that if the pump was low or bad it would wine really bad but mine dosnt. u said ur truck jerks to the left and right while driving. is it a rapid jerk left n right that happens randomly then stops when u slow down? or does it do it all the time

Well the truck randomly does it. its not all the time. It will do it one or two times when i get started driving and then stop. It sounds compicated but im sure its the pump or box. I changed the ball joints 1 year ago and there is no play in the linkage or wheel. Like you said the pump makes a louder noise than usual when this happens.