![]() ![]() I wish I had a good reason to replace our good condition, working red Koni RV adjustable shocks, but we were not blessed with money to burn like that.Ģ007 Phoenix Cruiser model 2350, with 2006 Jeep Liberty in-tow I would hope the FSD shocks could soften up just that very thing. I felt every road imperfection like crazy. During that trip, I laid on the hard floor face up with my head resting over the rear axle. The rig is equipped with the older red Koni-RV adjustable shocks set to the stiffest setting, along with HD stabilizer bars. On our heaviest trip, it weighed in at 11,480 pounds, right at the chassis limit. It is built on a 2007 E350 with a GVWR of 11,500. We own a rig that is 23-8" long end-to-end. The same fully-loaded rig built on an E350, the ride will naturally be much softer and so the FSD shocks can be more effective. A short 24' motor home built on an E450 chassis is going to bounce down the road no matter what you do with exception to removing a leaf spring or two. I wonder if it is most beneficial only when you have a minimal amount of load-margin when fully loaded on a trip. Regarding the FSD shock absorbers not being effective enough on some rigs. I'm looking forward to completing the picture by adding FSD shocks in the front. I was happy with the roll control stiffness of the stock shocks, but I was tired of their stiffness being added to the leaf spring's stiffness on roadway cracks and potholes. The reason I didn't go with any other rear shock is because I didn't think that what was needed was a rear shock that was stiffer all the time or softer all the time. If anything it's a more gently, rounded-off, less "jerky" control of roll in our 11,800 lb. However, the sway contol with the FSD shocks only in the rear is certainly no less than it was before. which of course came stock with front and rear sway bars and a front steering shock. Regarding roll control on curves, when going into parking lots, when big-rigs pass us, and when traveling in strong cross-winds: Any affects are subtle in these situations because our small Class C underloads our E450 chassis. After adding the FSD shocks, that latch now NEVER has come unlatched. That latch used to ALWAYS come unlatched after traveling a few miles on todays poorly maintained highways and freeways. However I have just about absolute proof - regardless of what we feel up in the cab - of what the FSD shocks are doing to take the pounding sting out of cracks and potholes: We have a latch back in the shower that holds the folding accordian shower curtain open. and they do, in general, make the ride less harsh on roadway cracks and potholes. We've had FSD shocks in the rear of our E450 based small Class C for over two years. KONI RV SHOCKS FULLI would suspect any claims of "dramatic ride stiffness reduction" from any solution other than removing of rear spring leafs or installation of a full air suspension system. ![]() The reduction of ride harshness in the rear of our E450 motorhome chassis is why I had Koni FSD shocks installed in the rear and the results are subtle, but that's just the way it should be. ![]()
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