Im looking to replace all the leaf springs on my 2003 f350 6.0 with the fx4 package and was wondering what everyone suggests. some one told me that i have to special order the springs because it has a stock 4 inch lift and i dont know if thats true or not. plus its kinda confusing since it has all the way around leaf springs
To my knowledge, Ford Motor Company has never offered a "stock" lift kit on any of their trucks. Some dealerships will upgrade new trucks with aftermarket lift kits, but that is pretty rare due to warranty issues.
If you have time, take pics of the front and rear suspension so that we can see the number of leaf springs in each spring pack. Look to see if you can find part numbers or the aftermarket company's name or logo. Also, does your rear axle have blocks?
I don't know why you need to replace them, but if we can determine "who" made the leaf springs, you may get them replaced under the aftermarket company's warranty.
Custom springs are not real expensive. Look in the yellow pages for your area for a spring shop. Discuss with them what you want (more height, ride modification, etc.) and they will bend you a set. A buddy had a set of springs made up for an 80's F-250 at this place, to increase rear height and capacity so he could haul a camper. The cost was very reasonable.