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Violent shaking when braking

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Old Oct 8, 2020 | 07:03 AM
  #16  
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Any loose or worn out steering components? Front end alignment lately? Tires still have the balance weights on them? I would do a quick front to rear tire swap and test drive.
 
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Old Oct 8, 2020 | 08:43 AM
  #17  
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Originally Posted by 77&79F250
Any loose or worn out steering components? Front end alignment lately? Tires still have the balance weights on them? I would do a quick front to rear tire swap and test drive.
Just balanced the tires yesterday. Front end alignment is all good. And yeah some play in the steering wheel but only when the truck is off other than that the steering is very well I can turn the thing with my finger. And if I let go of the steering wheel on the highway doesn't pull to the left or right.
 
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Old Oct 8, 2020 | 09:27 AM
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and still have the vibration? Not easy, but cheap, swap the tires front to back and see how it handles.
 
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Old Oct 8, 2020 | 09:39 AM
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Like all high boys you have no stabilizer.

The conversion kit is the cure all. it's a days work and $1400 but it's worth every penny. if you're going to sell the pickup anyway it's not going to pay to do it but if you'd keep it if it drove great and didn't leak a gallon of oil every day then just do it.
 
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Old Oct 8, 2020 | 11:37 AM
  #20  
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Originally Posted by 440 sixpack
How do you know it was original ? I have considerable experience for the last 45 years with these pickups and I have never seen a factory stabilizer on a power steering high boy.

If I'm wrong prove it , there is no concours judging book on 73-79 Ford pickups so this is how we learn . I'm finishing up an extensive expensive restoration on a '76 high boy and if I'm missing something I want it.
Allow me to take my foot out of my mouth for a second. I was thinking about the power steering assist ram and confused it with a steering dampener. My bad. I should stick to what I know better, lol.

 
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Old Oct 8, 2020 | 12:21 PM
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No problem. I wish I could say I've never been wrong .
 
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Old Oct 8, 2020 | 12:32 PM
  #22  
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Originally Posted by 77&79F250
and still have the vibration? Not easy, but cheap, swap the tires front to back and see how it handles.
I will do that today and keep everyone posted. From the sounds of it I'm not the only one with this issue. I've heard that tie rod ends could also be the issue?
 
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Old Oct 8, 2020 | 12:45 PM
  #23  
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tlrtucker looks like the same deal I have it's "power steering" assisted. I know it's confusing it took me a while to understand if it was power steering or manual steering but it's a little bit of both. Especially because most of the parts for them are labeled "power steering". That's why I call the alternative true power steering.
 
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Old Oct 8, 2020 | 01:21 PM
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lol, I never really looked that closely to be honest. Saw a ram, assumed it was a dampener. The second I looked under there and saw the hoses I knew I was wrong. Ah well.
 
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Old Oct 8, 2020 | 01:22 PM
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tie rod ends alone probably wouldn't create the symptoms you are talking about but they could make or worse.

The easiest way to check all the points in your steering is to watch as someone turns the wheel back and forth until they feel stiff resistance . there are other ways that are more precise but if it's serious it will be obvious doing this check

Your alignment could be really whacked too. it's pretty hard to check yourself but you can get a rough reading on your toe in by measuring the front and the back of the tire and see where you're at. .

 
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Old Oct 8, 2020 | 09:28 PM
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From the pics it looks like you rebuilt the front end. Are the knuckle bearings good and shimmed correctly on each side?
 
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Old Oct 9, 2020 | 08:49 AM
  #27  
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Originally Posted by moose4x4
From the pics it looks like you rebuilt the front end. Are the knuckle bearings good and shimmed correctly on each side?
You are correct the front axle is rebuilt and all berings are brand new and shimmed.
 
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Old Oct 9, 2020 | 08:58 AM
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Can you lift tires a few inches off the ground use a shovel to pry up on tire trying to see play anywhere
 
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Old Oct 10, 2020 | 07:04 AM
  #29  
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Well I've rotated the tires and it seems ok but still a little bit of a vibration when I use the brake coming from the steering wheel. And while braking the truck pulls to the right a bit
 
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Old Oct 10, 2020 | 08:20 AM
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But nowhere as bad as it was? I suspect maybe a bad tire, bent rim. DO you have a way to hot swap a complete different set of tires and rims and see how it does? Yea again not easy, but a cheap way to troubleshoot.
 
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