Wobbly Front End at 45mph

I agree! First thing I would be doing is crawling around and looking at cross members, look to see if anything has moved (clean spots), make sure bolts and any bushings on all suspension parts are ok. If you dont find anything then head for the alignment shop!
If these trucks were wrecked I would be willing to bet there are some loose/stripped bolts.

 

keep an eye on it, as even though you had new shocks, and alignment done, you may find that in about 10-12 months you may need new steer tires again. I replaced mine last may and now again just a few weeks ago....if this set lasts longer than 12 months then hopefully problem solved so I am just keeping my fingers crossed.

 

My opinion is the sector shaft is loose. I had a wobble around 50mph, I knew everything in the front end was tight, I called the shop boss at my old peterbilt shop. He suggested I tighten the shaft up 1/8 inch, I did and problem solved. I have since learned how to properly adj a TRW TAS steering gear.

Take the truck to a shop that can check the sector shaft adjustment.

 

I've been relying solely on Centramatics for my steer tire balance for more than the last 600,000 miles. Zero issues.

 

Had one similar to that and was bad tie rod end

 

Ok. Where can I find the sector shaft?

 

google TRW TAS steering gear. It's on the back side of the gear. Paccar has a round hole in the frame, 3/4 inch wrench for lock nut screw driver for adjustment. DON'T take to far, only like 1/8 in. I have been told that some truck brands do not have the hole in the frame to get to the adjustment. In that case the gear would have to come off. TRW TAS55 would be for 12000# axle.

 

Mine doesn't have a hole in the frame. Have to loosen the bolts mounting the box to the frame. I worked on and replaced or had practically everything replaced on my front end last year trying to get rid of wobbles and shakes. King pins were shot, ball joints on steering linkages, replaced the steering box. Even had sagging leaf springs replaced. I only wished a new set of steers would have corrected my problems but the truck is older with a lot of miles and stuff wears out.

 

I've thought about replacing the springs, as my tractor was in an accident that slightly bent one of the springs. I'd like to have it bent back, but due to the way the 2005 springs were constructed (material, I think?), no shop feels comfortable bending the springs.

 

How does your truck steer now? I remember you were putting a lot of time and money in your front end.