Ok here is my problem.At about 20 mph the steering shakes violently,so hard that it will pull the steering wheel out of your hands.The truck has a 5 inch lift with RTE radious arms with new bushings.New shocks with new bushing.New bushings in the pan hard bar.It also has a rovertracks hd tie rod.I just has an alignment done.The wheel bearings are good and tight.The steering staft is good and tight,same with the steering box.What am i missing?I'm at my wits ends,I'M STUMPED and woulds love to hear your ideas.
Jeff
Since you have checked everything else, that is what I would lean toward. Do you have a spare you could rotate to each of the front tires (one at a time). If it happened all of a sudden -- given what you have replaced -- this would be my first guess.
You can check that the bolts holding the swivel pin bearings on are all tight and not broken too.
I had this happen but not as extreme.... I noticed that it was the air pressure in the front tires were really low. check that first. I pumped them back up and had no problem.
Just curious, does it get any better after the tires warm up? I'm running 34x9 Interco Super Swamper Special Service bias-ply, and they take a set everytime I park it, even overnight. They get better as they are driven on.
Willing to bet its your tires out of balance. put some bbs in there and see what happens. Thats what I did with my 38 bias ply swampers on the chevy and it went away.
What's the new kingpin inclination (aka "caster") with the 5 inch lift?
When the alignment was done, I'm assuming that they didn't adjust the caster, which would have to be a severe adjustment because of the 5 inch lift.
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