Have 2001-4x4-2500-quad cab-SB- Diesel,rides kinda rough on the roads where i live so i carry 500# of wieght towards the back end of the box and it really helps the ride. There are 3 long spring leaves, and one thick shorter leaf below the 3, and of course the overload leaf on top. The top overload dosent come into play till you get a lot of wieght on,i am thinking about removing the thick bottom leaf,(replacing it with a spacer)becouse with the 500# in the back the top 3 hit against the bottom thick one and kind of hammers. As far as having the bottom leaf for wieght, i never put anything in my truck, i use it strickly for transportation,(wouldnt own anything else),so am wondering if anybody has removed this bottom leaf to make it ride better,if so did it ride better,also would it cause any problems for the other 3 springs and overload leaf?