09 f350 SD random pulls in steering
 

Hey, ive been reading through these forums since i bought this truck, this site is awesome. Anyways, i just bought a used 2009 F350 SD about 4 months ago. Came with new tires and was running fine until this week i noticed a pull in the steering wanted to wander left a bit. So, i would counter-steer to the right and it would feel tight for a second and then pull me right. This happened about 3-4 times now in the last week, i dont hear any noises that i know of. Jacked up the front end to see if there was any play in the hub or front end everything seems to be tight. It doesnt happen all the time but every now and then itll scare the **** out of me, anyone else had this problem or know what it might be ? ive only owned this truck in the winter months and now that its warming up ive noticed this problem, not sure if its the spring ruts or what. im running michelin at2's at stock size 275 70r18 i beleive. Im probably gonna throw it into the shop here soon just wanted to know if this was a common problem. sometimes ill turn left and it wont want to return to centre. anyways, ill keep on reading up on the forums here. Love the truck, want to do the DPF/EGR delete and maybe get a lift/mud tires soon but i got to get the truck running sound stock first :D appreciate any suggestions.
Cheers

my truck does something similar.... it definitely needs an alignment... but the problem i have is when u start braking the truck will want to pull either left or right and it doesnt do it all the time...its wierd... checked the brakes everything is ok....gonna endup bringing it in to the shop eventually as well.... keep us posted on what u find... good luck!!

My guess would be the steering gear.

Steering gear seems right to me. You could try to rotate tires first, flush the power steering system as well.

My 2008 61000 miles was doing that similiar steering issue,Replaced the lower r/s tie rod assy and the tie rod assy off the steering gear and it tightened up the steering and got rid of my Death Wobble that i have been fighting and threw alot of $ at! Wished i hadn't spent the 800.00 on adjustable track bar and replaced ball joint on my stock one.Would have saved 650.00 and lot's of bump steer!

Update, ok so its been a week or so since i posted last, same thing still happening, but, ive narrowed it down to, sometimes after i start my truck it does it, and then ill pull over to the side of the road, put it in park and start driving it, and its fine !?!?!?! wtf, does that mean its not mechanical ?? could it be something in my computer trying to compensate steering ??? this cant be, anyone got any ideas ? am i the only one who has had this problem ? :p

check your front axle u-joints could be stiff.

The computer has nothing to do with the steering. Did you ever get the steering gear checked? Cuz that's still my bet.

Hey! finally got my truck into shop, front axle u-joint is seized aparently u need to do some vacuum gasket when u pull it apart, hopefully this fixes the problem, thanks for all the help hit the nail on the head :D my auto 4x4 never worked anyways, maybe this will fix that too with the new vacuum gasket. i get my truck back tomorow, ill post updates !!!