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Pugga, you are right, my wife is not mechanically inclined at all, I did not feel any side to side difference but I could tell you there was no improvement in ride quality over the OEM's both unladened and while towing. Several people have stated a noticeable difference when they installed the 5100's. Maybe the 4600's are just too soft for the Super Duty. Interested to see if others have a similar result or not. I will be contacting my distributor to see if they can propose a resolution. I am not looking for a ride similar to my previous F-150's but at least something better than the stock FX4 shocks. I don't know how the OEM shocks were doing anything since all four of them had oil running down them and would not even rebound laying on the ground after just 5,000 miles.
Never underestimate the placebo effect. I have changed shocks on thirty or so vehicles of mine over the years and the only night and day difference were 100,00 or more miles old shocks.