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Message: [QUOTE="me2, post: 409598, member: 3825"] Which is exactly what I did for the rear air ride suspension on my '99. See my build thread for it. The panhard bar is very problematic on these trucks. To get decent bag weight capacity without a leaf and to get decent bag volume such that you get a good spring rate, the bag pretty much needs to go behind the axle if you aren't lifting the truck. When you do that, it pretty much forces the panhard bar above the diff and the geometry of doing so messes up the axle motion. I'm striving to build a suspension without the panhard bar this time. If I was going to use one again, it would go behind the axle, where the length and geometry are more favorable. Long, triangulated links are fine for race cars, but not Superduty trucks with 6,000 pounds on the rear axle going around twisty mountain roads. You need long bars to get the link geometry right for zero squat/ anti squat. A good 4 link calculator is your friend. The other issue with triangulated 4 link systems on Superduties is that the fuel tank on the driver's side of the driveshaft takes up the space right where you want the one link to go. The exhaust system takes up the other side. Which is why all the Superduty 4 link systems I have seen have the links outside the frame rails. There is probably room for a single torque link, which is why I am thinking its a plausible solution. I'm intending to emulate the Firestone R4Tech system in using a single leaf to place the axle and bags (air springs) to be the primary lifters. The problem with that setup is axle wrap under braking and pulling loads. Simple traction bars work OK with stock springs which have much more leaf content to control their part of the axle forces. However, you lose that when you get down to a single leaf spring, thus making more advanced torque control necessary. Seems like a single (factory OEM) piece bolted in to me. Am I missing something ? [/QUOTE]