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  #21  
Old January 10th, 2014, 05:35 AM
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Tom Rowe
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Shocks might work. It's always better to throw parts at a problem rather than do a methodical diagnosis.
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  #22  
Old January 10th, 2014, 06:11 AM
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Check your bushings- pan hard and radius arms, as well as TRE. It is possibly the pins, but typically the consumables mentioned are beyond their life, and can cause issues...
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  #23  
Old January 10th, 2014, 06:36 AM
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Bill Adams
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Quote:
Those bearings don't have much load on them and never spin more than 15 degrees.
Just the weight of that corner of the vehicle, so yup, not much. They do brinnell, especially when you keep taking shims out. Not sayin that this is the problem for this bloke, but that the swivels are so easy to service once you get drilled down that far, that one should just go and do the job. Parts aren't that dear either.
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  #24  
Old January 10th, 2014, 07:42 AM
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I had the same exact thing happen on my 88 RRC. Ended up being a worn out panhard bushing. Took all of 20 minutes to fix.
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  #25  
Old January 10th, 2014, 08:20 AM
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A bad shock, wheel, separated tire, pan hard rod....etc, all "contribute to the harmonic wobble" at the end of the day it's going to be a pre-load problem. Say you rotate the tires and the problem goes away....it will come back maybe not for 6 months...but unless the pre-load swivel gets addressed you still have a problem.
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  #26  
Old January 10th, 2014, 09:57 AM
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Chris Davis
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After I did just about everything a couple years ago, I still had the DW. It was swivel ball preload. Yes, my balls had incorrect preload. Shimmed them and now no DW. If you need new shocks, which there are non-DW ways to check, then replace them, but don't go around randomly replacing stuff that doesn't seem worn out as a guess, IMHO. I've done way too much of that (and still do from time to time). One should check their preload anyways--it is rather simple.

What gets me, after all these years, is how that preload actually causes the DW's. I know it does--positive of it. But why exactly just doesn't make intuitive sense.
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  #27  
Old January 10th, 2014, 08:36 PM
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Daniel Marcello
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Also if you rotate the tires you might notice it go away for a bit or get a lot worse.

Less air pressure on the front tires will keep you feeling the vib a lot less. More air in the front tires and the vibs will be real bad.

Im positive its the panhard bushings and/or swivels
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  #28  
Old March 3rd, 2014, 06:42 PM
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Yep, it was the pre-tension on the swivel pins, thanks for the advice.
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  #29  
Old March 3rd, 2014, 06:49 PM
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Awesome!
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  #30  
Old March 3rd, 2014, 07:37 PM
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Quote:
Originally Posted by CavemanDiesel View Post
Yep, it was the pre-tension on the swivel pins, thanks for the advice.
Did you solve by adding/removing the shims, or replacing components? Did you do the fish scale measurement to set the proper tension?
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  #31  
Old March 3rd, 2014, 09:09 PM
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Quote:
Originally Posted by nathanwind View Post

Did you solve by adding/removing the shims, or replacing components? Did you do the fish scale measurement to set the proper tension?
I removed shims and replaced top pin, used fish scale. Had to try several times until I got 18 lbs of tension, it wasn't difficult just trial and error until you get it right, now on to other problems, where's that white smoke coming from, dam.

------ Follow up post added March 3rd, 2014 09:14 PM ------

Quote:
Originally Posted by Antichrist View Post
Shocks might work. It's always better to throw parts at a problem rather than do a methodical diagnosis.
Isn't this part of the deal? We buy farm trucks from another country and then spend crazy money fixing them up. Then drive them until they break and fix them again. I like this game,
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