Lower your truck, not your expectations! DJM Suspension has everything you need to give your street truck the smooth ride and lowered stance you demand. Founded in 1989, DJM Suspension manufactures a full line of lowering components, including complete lowering kits, spindles and control arms, lowering springs, flip kits, C-notches, shocks, and more. The company offers suspension drop options for Chevy, Ford, Dodge, Toyota, Mazda, and Nissan trucks from compact to full-size. Each part is made in the U.S.A. at DJM Suspension’s state-of-the-art manufacturing facility and meets the highest quality control standards. Don’t compromise—get the look and handling you want with DJM Suspension!
CALMAX Control Arms
Control arms or “A” arms are the component which connects the spindle/brakes with the frame. There are usually an upper and a lower. The lower arm is the big one, which supports the weight of the front end through a spring or a torsion bar. The lower arm is where the actual lowering takes place in the CALMAX systems. This is done by moving the spring perch down and the lower ball joint (which attaches in the spindle) up relative to each other and the frame. The upper control arms attach to the spindle through the upper ball joint (in the spindle) and to the frame through shaft or pivot points. The upper arm has no influence on ride height but has a great deal of influence on alignment.
While control arms might be considered the horizontal members of the front end, spindles would be the vertical member that ties the control arms together. Both upper and lower control arms attach themselves through ball joints to the spindle. This is a cast iron part where the machined “axle” or steering knuckle is located. The wheel bearings and brake rotors are mounted to the axle, and the spindle also locates the brake caliper and tie rod end (steering). Steering knuckles are found on some late model trucks. They do exactly the same thing as a traditional spindle only there is no axle mounted in them. A hub center which has wheel bearings and wheel mounting hubs integrated together just bolts into the knuckle. Dropped spindles are simply spindle castings where the axle (or hub center) is moved up away from the lower ball joint. This lowers your truck by moving your wheel up in the fender well. There is a limit to how far you can move the axle up (you run out of casting), which is why you see most spindle applications drop about 2 inches.
Lowering Coil Springs
About the same time that dropped spindles came along, engineered lower coil springs hit the market place and are used every day by enthusiasts to get the stance they want. Used by themselves you can get up to 3″ of drop or combine them with a spindle or control arm you can get more. Remember though, dropped springs cause you to lose travel (ride quality), always have a higher spring rate (ride quality) and require different shocks (more money). You also have to deal with the alignment issue. If you want to go really low your best bet is to use CALMAX Control Arms with your drop springs because you have more alignment control.
Ford I-Beam trucks have a much different suspension than most other trucks. Spindles are non-exist for lowering, using lowered coil springs cause more alignment problems than you can solve. That leaves dropped beams. Dream Beams are tubular in design, using thick walled DOM (seamless) tubing which is telescoping/nested (tubing slips inside of each other) and does not suffer from “weld creep”. Dream Beams are welded in a radial manner (mostly in the fixture) which almost eliminates any twisting or movement of the steel as its being welded.
To understand what a torsion bar key does we need to take a look at the whole torsion bar front end. First, a torsion bar is really a spring. It works just like a coil spring except it twists instead of compressing and expanding up and down. Torsion bar diameter and length will determine the rate of the bar, just as the wire diameter and the number of coils determine a coil springs rate. The lowering torsion bar key works by changing the “indexing” of the bar, rotating the hexagon shaped mount.
Rear leaf spring shackles are commonly used to level trucks. For those of you who just can’t stand the raked look of factory stances, the lowering shackle is for you! Typical drop is two inches and fairly simple to install. You simply remove the factory shackle and replace it with a longer drop shackle.
The first thing to get off the table regarding “flip kits” is nothing is actually flipped! Simply put a flip kit moves the axle from beneath the leaf spring to on top of the leaf spring. The typical drop you can expect from a flip kit is in the 5” to 8” range, depending on the thickness of your leaf spring pack. DJM makes their flip kits with adjustable axle locator brackets. You have the ability to rotate your axle to the proper angle and then lock it in place. This is the best way to deal with pinion angle.