Re: [Amc-list] truck arms

[Wrambler242@xxxxxxxxxxx]

I have to admit to not being a rocket scientist, But I just don't see the reasoning to condemn the truckarm suspension absolutely. It contains triangluation and a track bar. The arms are 51" long and the front seperation is probably somewhere in the 12" range. Rubber bushings up front to allow twist.
   I know that the system has drawbacks, but are they sevsere enough to actually casue a problem with a Sunday driver? Or even a daily driver?
    I agree paralel bars, especially short ones would be a big problem, binding would have to occur.
    I have no love of ladder bars.
    4 Link design and installation would probably get  me in to more trouble! 
The truck arms just plain appeal due to their oldschool looks, long swing, center push, close to where the torque tube pushes now. 
   I've not whipped out a torch or plasma cutter, yet...
I may never do so.
   I am very interested in reasons to not build any rear suspension for any reason!
   If I do build or cut. I'm not looking for that perfect world rear suspension. That would probably be a fully articulated 4 link with watts linkage would it not??? Oh, and bags so I could slam it or raise it for speed bumps at will...
   

--
Mark Price
Morgantown, WV
1969 AMC Rambler, 4.0L, EFI, T-5

 -------------- Original message ----------------------
From: msproviero@xxxxxxxxxxx
> Tom-
> 
> 
> In response to this and your earlier email that pretty much contained "4-link 
> 101" info, I would suggest that the people you have seen/heard of who have been 
> unsuccessful perhaps did not do sufficient research, used substandard 
> components, employed bad math or geometry, or did not have the proper equipment 
> ot skills to perform the work.  While people who are only familiar with 
> leaf-spring suspensions would certainly benefit from it, explaining the 
> principles you described in your earlier email on a board that contains 
> fabricators would probably draw a "Well, duh" type of response.
> 
> The right angles, lengths, materials, and combinations of components (like these 
> joints for example:)...
> 
> http://www.rubiconexpress.com/Products.aspx?Cn=169&Pn=1965&XnPath=169&Vid=2FDCF3
> 1304331
> 
> ...have been allowing buggy and trail-rig builders to construct non-restrictive 
> suspensions that still demonstrate the desired anti-squat characteristics with 
> much larger forces acting on them than any "Sunday driver" for some time now.  
> The hobby is seeing a departure from heim joints, as well.  I even replaced the 
> huge heims on my XJ with the RE Superflex joints I linked to above and it made a 
> world of difference.  People are doing 4-links on unibodies without mounts 
> tearing out as well (XJ's and ZJ's).  I think that this stuff just hasn't 
> filtered its way down to the do-it-yourselfer's at the road car level, yet. 
> 
> 
> -Spro
> 
> -------------- Original message -------------- 
> From: Tom Jennings <tomj@xxxxxxx> 
> 
> > Hey, no sweat off my butt if you have to re-weld all the arm 
> > ends after every Sunday drive! 
> > 
> > 
> > The problem is that it will 'want' to *lift* the wheel, and not 
> > let it lie flat. That won't happen of course, metal will stress. 
> > 
> > There was/is a guy here in SoCal with a '62 Classic wagon that 
> > did this, and his arms cracked often, and bound on body roll, 
> > and rode badly. His arms were parallel though, not angled; 
> > the angling will make a big difference. 
> > 
> > 
> > OK I'm done, you can lead a horse to water, but it's hard to 
> > hold their head under :-) 
> > 
> > 
> 
> > 
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