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Old 03-16-2017, 08:57 AM   #15
CorneliusRox
 
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Name: CorneliusRox
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Join Date: Dec 2012
Location: Detroit, MI
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Quote:
Originally Posted by Duramaxfan03 View Post
Doesn't having a shackle in place where the bars meet the frame ruin the whole purpose of having traction bars? As you apply momentum the rear end wants to move, so the bars are supposed to hold it in place, but now that you have a shackle wont the bars just move the shackle back and fourth, thus allowing the rear end to still pivot? Im just a rookie puller so im just trying to learn.
You're thinking of it more like coil springs work.
With leafs, you can let the leaf hold the axle fore aft (and obviously vertically). The issue is pinion angle (axle rotation). With NakeDiesels setup (the best setup IMO), you make a triangle off the axle that's rotationally rigid, but can flex in the lateral direction because of the bushings at the axle, and can 'float' in the fore aft direction because of the shackle. What it will constantly do is provide rotational support, and what it wont do is create binding.
Other than the weight involved, it's the best/simplest setup you can do for a leaf spring rear. And I mean that for pulling, mud, drag, street, and towing.

There are others that try different stuff. I know FirePunk does a full four link rear and binds the leaf spring on purpose, but they gain more control over pinion angle and can keep it the same angle throughout travel. This setup will give you less pinion angle change per inch of travel, the longer you make it.
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