MID-TRAVEL GM HD
LEVEL STANCE, MORE WHEEL TRAVEL & BETTER SHOCK DAMPING FOR THE 2011-UP GM 2500 & 3500 TRUCKS
Level stance, more wheel travel, and better shock damping for 2011-up GM 2500 and 3500 trucks.
ONE OF THE BIGGEST ADVANtages that the GM 2500 and 3500 HD trucks have over the other heavy-duty trucks in the category is the smoother and more precise-handling independent front suspension. Of course, the solid front axle found on the Ford and Ram counterparts is a more bombproof design, but if you’re looking for a good ride over a rough surface on a dailydriven 4x4, then IFS is usually the way to go. Unfortunately, modifying an IFS suspension for bigger tires is quite a bit more complicated than lifting a solid-axle 4x4.
With all of this knowledge in hand, JD Fabrication set out to level the stance of the 2011 to current GM HD trucks while improv-
ing the ride with 2 inches more wheel travel up front and tunable 21⁄2 -inch King free-bleed bypass reservoir shocks at all four corners. The lift is designed to allow fitment of true 35x12.50 tires on the stock aluminum GM 18-inch wheels with only minor trimming. Installation requires slightly more than your common handtools, but no welding is required and you can do it in your driveway, followed up by a trip to the local alignment rack.
11The JD Fabrication mid-travel kit for2011-to-current GM HD front suspension starts with fabricated upper A-arms made from laser-cut, MIG-welded mild steel. The design of the arms allows for 2 inches of lift via cranked or keyed torsion bars and 2 inches of additional suspension downtravel.
44 The 21⁄2-inch King shocks included with the kit feature JD Fabrication–spec valving and special offset lower mounts to clear the CV 4x4 axleshafts. The free-bleed bypass tube allows for position-sensitive adjustment that you can tune to your liking. Turning the bypass screw firms up the suspension compression and rebound; loosening the screw softens the compression and rebound.
33OE-style rubber bushings are utilized on the frame end of the JD Fabrication A-arms. This reduces the amount of noise and harshness transmitted through the suspension and frame into the cab. These bushings are designed to last 100,000 miles or more and don’t squeak, rattle, or require any maintenance like some aftermarket alternatives out there.
22 Instead of a traditional ball joint, the JD Fabrication A-arms feature custom highmisalignment EMF uniballs. They are completely rebuildable, and no drilling is required for A-arm installation. The tapered shank matches the tapered hole in the factory GM knuckle.