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Message: [QUOTE="Vader's Fury, post: 1021930, member: 473"] I believe I am following what HRT is trying to explain. In the attached picture I have circled the shackles in red and the bars that you added in blue. The problem I believe(and I may be wrong, please correct me if I am) is that as the rear suspension compresses, the leaf spring becomes longer in length and the shackle end will move towards the rear of the truck. This is because the front mount for the leaf spring is rigid mounted and the arched shape of the spring. The issue with your bars that you have added is that they stop this motion from happening. Since they are mounted on the rear of the axle, they stop the axle from moving towards the rear of the truck. This is causing a binding of the leaf spring since the axle can not move with the spring. This is the energy that is getting locked into the rear suspension and causing the truck to unload and get loose on you when you are running fuel only. If you flipped the bars to the front side of the axle, you would be doing the same thin, creating a "4 link" using the bar and the leaf spring, but it would not cause the binding that you are experiencing now. [/QUOTE]

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