F & R springs are shot on my truck. I plan on doing the SD spring conversion on the rear and I picked up a set of low mileage 97" F350 springs for the front. Will I need add-a-leaf's for the front to make up the difference of the SD rears? Comments or suggestions welcomed. I need to clear 285's.

 

How many leafs in the 350 springs?

 

2 leaves.. but from what I understand F350 springs are softer but have more of an arch.. just not sure how much.

 

Here is a site I use for research.

 

Now thats about a handy site!

 

250 springs will give more height. Why don't you look at all the bushings real good before condemning the springs. I put all of the springs from my 250 on the 350 with new bushings and got them all rearched back to factory height. It now sits higher than it ever did. Rides like a darn steel wheeled tractor too when it's empty!
THis is an old pic. It's 4-6 inches higher now with the camper loaded.

 

I know all the bushings are shot. The fronts are missing the teflon pieces between the leafs and one side has noticable wear on the main leaf. The rears are done one has a broken leaf. The f350 springs i picked up are E3TZ-5310-R code which are 3486lb springs which were off a truck with a plow package.

 

Does anyone have pictures of there front springs with add-a-leafs installed?

 

At this point you might as well go all new. Anything else you try is just gonna be a band-aid. You'll be putting a grand in it including shocks. But it will be worth it in the long run.

 

Is that site showing the arch of the springs with the weight of the truck on them or without?

 

I would think those would be the measurements with no weight. The pictures are just representative of a generic leaf spring. Arc per say isn't shown or documented. Just the measurements fore and aft of the center pin to the center of the bushing. Width and thickness of the spring pack. The spring designations (43-498 for example) probably would most likely contain that information. Darn good question though. Wish I could give a more informative answer. A new 43-498 spring pack for a D50 equipped truck is flat since the arc is negative.

 

Thank you. You answered my question thoroughly.

 

Just picked up a full set 2002 f250 takeoffs that have been sitting since 2002 for less than i could went to a pick yard. Don't need the front ones but got them anyway. Just waiting for my shackles and hangers.