time for a new look!
Thanks in advance,
Rick
You won't find much quieter than a Michelin, possibly a Bridgestone.
Little Lift = ATS Springs a featured vendor. Leaf Springs and Suspension Parts by Auto and Truck Springs
18" 2004 SuperDuty "SVT" or "Harley-Davidson" or "Lariat" or "King Ranch" factory wheels. https://www.ford-trucks.com/forums/1...excursion.html Start scouring Craigslist
5 hole wheels....maybe Five spoke
You won't find much quieter than a Michelin, possibly a Bridgestone.
Little Lift = ATS Springs a featured vendor. Leaf Springs and Suspension Parts by Auto and Truck Springs
18" 2004 SuperDuty "SVT" or "Harley-Davidson" or "Lariat" or "King Ranch" factory wheels. https://www.ford-trucks.com/forums/1...excursion.html Start scouring Craigslist
5 hole wheels....maybe Five spoke
While you can do modded X's modded C's and just about any other alphasoup you can actually talk to some one.
Is it cheaper to go to the salvage yard and pull off some 300,000 Mile super duty springs from a rusted F-350?
Probably not,when you consider your time.
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If you want airbags then we will need to solve for that since the standard Excursion kit will need some mods to work.
you would likely get the F250 kit and add a Daystar mount. If you decide to go this route I can look it up and work through the issues with you.
Track bar, I like the heavy duty one PMF offers. ( they can also supply you the shocks ) there are other acceptable options that are popular but I am not familiar enough to recall the name of them.
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You will want new Ubolts front and rear, aside from that, maybe new shackle bushings depending on the condition of yours.
Shocks, see the current thread on the front page were we are discussing this spring combo but if it were me I would get the 10/12” 5125 with 255/70 valving over the vehicle specific ones listed on the chart on this list.
https://cart.bilsteinus.com/Portals/...g-2018-WEB.pdf
fwiw.....amazon has the best deal on the procomps I have run across recently.
Plenty of folks here run the ATS Springs But I am not that familiar with them or know the spring rates other then the rear is a dual rate spring. The procomps are 430/380
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Will the sway bar(s) ends need to be upgraded to extended versions?
Will the rear axle require a degreed shim to correct the new driveshaft angle?
Also listening on the adjustable track bar recommendations.
For the stern with the ProComp 22415, it isn't as clear and I still have to do some measuring... but I *think* the 33-185576 (20.75/34.90" 255/70Nm) will work, though it may be around 1/2" too long when compressed - requiring some addition to the bump stop.
Will the sway bar(s) ends need to be upgraded to extended versions?
Will the rear axle require a degreed shim to correct the new driveshaft angle?
Also listening on the adjustable track bar recommendations.
Degree shims... depends on what type rear shaft you have.
I have a single joint at each end and if I wasn’t switching to a Double Carden shaft I would need a shim.
As much of a PITA it is to take apart it’s best to do the install and spec out your angles to see exactly what shim you may need.
For the stern with the ProComp 22415, it isn't as clear and I still have to do some measuring... but I *think* the 33-185576 (20.75/34.90" 255/70Nm) will work, though it may be around 1/2" too long when compressed - requiring some addition to the bump stop.
Regarless of what shock length you do end up on you want the shock body to be 1/2 to short on compression. The way the f250 and Ex mount the shocks if there is enough room on compression you will have a few inch extra on extension.
think about it... those 5” springs are going to net about 8” of total travel so a 14” shock is not going to be using the entire stroke.
I’d have to sit down and do some figuring but with my 7” spring I am using a 12” rear shock, it just clears on compression and has like 3” extra on extension.
I have had my Nitto Dura Grapplers in 305/70R18 (35.28" X 12.8") on '04 OEM Lariat 18"x8" wheels for 5+ years and over 30K miles. These highway tread tires are the quietest truck tires I have ever used and they are wearing very well. When towing (most of the EX's miles) the rear axle sees over 6K lbs and these tires handle that weight with zero issues and continue to feel and sound as they do unloaded.
Being a former Police rig is your EX a SSV (Special Service Vehicle) model? Does it have carpets, third row seating and rear heat and AC? Mine is a former Army Corps of Engineers vehicle but is a standard issue XLT with all cloth seating, carpets and rear HVAC.
Rick
Okay... I'll take your word for it, I just have no idea of how much a leaf may extend when air suddenly appears under the tires. I was going to install the springs and look at the unweighted travel and add a margin of error.
think about it... those 5” springs are going to net about 8” of total travel so a 14” shock is not going to be using the entire stroke.
I’d have to sit down and do some figuring but with my 7” spring I am using a 12” rear shock, it just clears on compression and has like 3” extra on extension.









