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Message: [QUOTE="Coueshunter, post: 1410474, member: 22926"] When a spring compresses without a traction bar it grows forward and rearward of center. There is no shackle on the front of the leave spring. So when the suspension compresses the rearward half grows pushing the shackle rearward. The front half grows doing what? Pushing the axle center rearward. It cannot move the shackle without moving the centerline of the axle and leaf as the front half tif the leaf spring is fixed on both ends. It's easy, without building a model to see that as the suspension compresses WITH NO TRACTION BARS the axle has to make a rear ward arc as axle center raises and pushes rear. Now, let's add traction bars to this mix. The traction bar mounted at ride height would be at its shortest distance. As the suspension compresses the axle would be moving up and back. (We clarified this has to happen in order for the front spring to flatten out). Now, as you raise that traction bar from a downward angle to a horizontal plane (we know, it won't make a perfect horizontal plane) it will be at its longest point. Which means the natural movement of the traction bar would be moving slightly back of center as it is raised (suspension compressing) So as the rear leaf spring follows its natural movement of moving up and back, the suspension with a traction bar will follow virtually the same path... [/QUOTE]

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