I was driving through town yesterday and for the first time in a long time I saw a 406 drive by and I followed him for a bit and I was noticing that his suspension was actually moving some on his empty flat bed truck. I was trying to see his coil springs to see what they looked like and they looked possibly smaller than mine and it got me thinking. My truck is a Schmidt cab 406 that originally came with a snow blower. I found a web site one time that told how to calculate spring rates by measuring the diameter of the spring, the number of coils and the thickness of the coils. When I did this my front springs are 1740 LBS and my rear springs are 860 LBS. I'm now thinking that my truck may have way stiffer springs in it because of the heavy blower and the diesel motor that used to be mounted in the bed of truck. I'm really curious now as to what a normal 406 has for springs. I don't mind the rear springs as I usually go wheeling into the Rubicon with a couple thousand pounds and it rides nice going in but the trip out empty is not as nice at all. To get rid of some of the harsh ride out I am now running 41 x 14.50 IROC radials and beadlocks with about 9 psi and I have new shocks which made a huge difference but now I am wondering about different 406 front springs. Does anyone now if 406's came with different springs depending how it was equipped? And if they did does anyone have some softer springs that they want to get rid of, sell or trade???? Years ago when I got the mog before I wheeled it I was planing all kinds of mods to make it wheel better including different springs but then I took it wheeling and realized the German engineers that built it knew what they were doing and to my surprise it wheeled amazingly well. Beadlocks, shocks and tires is all I have done.