Removing every other leaf in the rear spring pack improves the ride and decreases load carrying in three ways:
1. Fewer spring leaves lowers unsprung weight, so the axle can move up more easily when it hits a small bump.
2. Fewer spring leaves means greater spring flexibility so the bed can move down more easily.
3. Fewer spring leaves decreases the load carrying ability accordingly. If one wanted to drive an M-series truck long distances often without risking spinal surgery, consider removing every other rear leaf and adding air overload bags for those times when it will be loaded heavily.
I wouldn't remove any front spring leaves, because the weight of the cab, engine and battery is always there. FWIW, most Stude front springs I've seen are already flattened quite a bit by sixty years of pounding.
Posted on Sep 20, 2011, 12:01 PM from IP address 18.104.22.168