Building For The Best Of Both Worlds: Tow-Haul-Chase Project Ford

06. Since the 4.0 Chase kit lifts the truck only four inches and keeps the track bar and steering draglink at reasonable angles, there is no track bar drop bracket, nor drop pitman arm. For our intended purposes we liked the idea of the bars being almost parallel with the front axle, so Revolution Vehicle Dynamics incorporated a track bar bracket and forged drop pitman arm made for a Trail Master 6-inch lift kit.

06. Since the 4.0 Chase kit lifts the truck only four inches and keeps the track bar and

Revolution Vehicle Dynamics in Apple Valley, California, helped us piece together a front end that includes Pure progressive-rate 4-inch-taller coils combined with a four-link conversion (from the stock radius arm design), a Hellwig sway bar, Prodigy 2 5/8 shocks, and a Trail Master track bar bracket and dropped pitman arm.

In the rear, we have Atlas leaf springs combined with Prodigy 2 5/8 shocks, Hellwig air bags, and Daystar’s new Air Bag Cradles that allow full droop while running air bags.

We could have made the suspension more impressive by adding external-bypass shocks, linking the rear while using air bags, or increasing the cost a number of other ways, but we didn’t want to overcomplicate the suspension with more moving pieces, nor did we want to build a package that costs more than what we see as a reasonable amount of money for a new diesel truck’s suspension.

We’ll no doubt add a few more parts to this Tow-Haul-Chase project truck in the future, but we believe this suspension is staying since it does everything we ask of it and gives a comfortable ride to boot.

07. The front package was effective, robust and, without question, much more prepared for a life with OFF-ROAD than the stock suspension would have been. But the four-link conversion did create one possibly negative (possibly positive) effect: Four-links move more freely (less binding during articulation) than radius arm suspensions do. When we converted the truck to a four-link (from radius arm), our Super Duty’s front suspension allowed the truck to lean over more easily. The suspension articulated better in uneven terrain, but it created a little more body roll on pavement.

07. The front package was effective, robust and, without question, much more prepared for a life with OFF-ROAD than the stock suspension would have been. But the four-link conversion did create one possibly negative (possibly positive) effect: Four-links move more freely (less binding during articulation) than radius arm suspensions do. When we converted the truck to a four-link (from radius arm), our Super Duty’s front suspension allowed the truck to lean over more easily. The suspension articulated better in uneven terrain, but it created a little more body roll on pavement.

08. Too much body roll makes a vehicle handle poorly and also difficult to tow with. That’s why Hellwig offers replacement sway bars with increased spring rates. This (pictured, lower bar) Hellwig Super Duty replacement sway bar has a 255 pounds per inch rate—a 38-percent increase over the stock Super Duty sway bar (pictured, upper bar).

While increasing a sway bar’s spring rate is generally not what you’d want to do for the dirt, it’s exactly what you want to do for towing applications.

We used our Hellwig bar for similar reasons: Since Super Dutys were made with radius arm suspensions, the stock sway bars have a softer spring rate than they likely would have if they’d been built with four-links from the factory. Adding the Hellwig sway got our truck back to “stock” street handling and towing traits when combined with the four-link conversion.

Towing With Our Air Bags and Cradles

With 37-inch tires and a 6-inch lift kit (using blocks and mini-packs instead of the factory overload leafs) our Super Duty squatted a lot when loaded down with our Carson trailer.

With the (even softer) full replacement leaf springs in our 4-inch lift kit, our truck’s rear ride height remains the same when loaded down thanks to the Hellwig air bags. They offer our truck better control when towing a trailer.

At some point, we’ll probably add an onboard air compressor, but for now we just use an external pneumatic source to fill up our air bags through their Schrader valves.