Hello there, I’m not on expert yet on Jeepspeed, but know the physics of it very well, I have a 97 Xj with a Rustys LA 4.5” lift kit with fox 2.0 piggy back bypass up front and in the back Rustys 4.5” Jeepspeed springs with fox 2.0 remote reservoir, had a lot of problems with the OEM shackles bumping into the frame, so started to do some research and found that Liquid Iron Industries sells leaf springs sliders, I told myself why not give them a try, I bought a set and install them in my Xj, they do very well, the rear of the Xj fills less loose and the leaf spring has a lot more travel, last November I helped some friends at the Baja 1000 with one of the pits, there car broke about 80miles from my pit, so we had to go and pull them, to get from my pit to the car, I had to drive on the race course with every race car flying by, my Xj did pretty darn well with the sliders, I recommend them, you will never go back to shackles.
This Xj is my daily driver and I travel a lot on it, on the high way at about 80MPH it feels like if you were driving a stock vehicle with the suspension set up I have.
So if somebody has problems with their shackles, I recommend changing in to leaf spring sliders.
Check them out
http://www.liquidironindustries.com/product.php?productid=18222&cat=0&page=0&featured=Y