Tires out of balance bad tire seperation in the tire some ft end part wornout
In the last week, i test drove 2 different new 2008, f-150s both 4wd king ranch, both had a shake in the steering wheel that I didn't like. last ford I owned was back in '84, not a 4wd but extended 2wd and I remember the front end being shaky, have had z71, ever since but drove a '05, king ranch (my son's) last year and it didn't have the shaky steering wheel, it drove nice and smooth. one of salesmen told me it was due to the tire having a flat spot from sitting in parking lot for a few days with out being driven. ???
I would put money on it that you have a bad belt in a tire...
If the vibration is at highway speeds... gets worse the faster you go, it's most likely a balance issue. That's not to say you don't have a bad tire or a tire that has worn funny due to misalignment of the vehicle, but highway vibrations are usually balance related. If there is a very regular vibration at speeds below 10 MPH, that would indicate a bad belt.
Before you rate an answer as "innappropriate", did you have the tires checked by a certified technician with the proper equipment (like a Road Force Variation balancer from a company such as Hunter Engineering)? Like I said, I'm not saying that you don't have a bad tire, but broken belt issues "normally" show up at lower speeds with a regular oscillation of the steering wheel and highway vibrations are "normally" balance issues.
I'm an ASE certified Master Tech with L1 and X1 certs and a Chrysler Level 3 Silver Tech and a Nissan Scope Technician with over 12 years experience- I've seen issues like this before.
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SOURCE: steering wheel shimmy at highway speeds
This sounds like tie rod ends are going out. Before you remove the old ones, mark on the threads where it currently is seated or you will throw it out of alingment when you put new ones on. You may need to borrow or buy the tool for poping out the tie rod end. They aren't a big deal to change if you have some basic tools and sometimes you don't need the wedge tool either. Once you get the old one out, try moving it around. If it is real loose and moves easily, thats your problem. But the swaying you are describing sound like this is the problem. Could be you steering control arms as well but because the inside of the tires are worn I doubt it.
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/matthew_d24b835e574ef6ca
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