Jeep Wrangler Suspension - The Quadra-Coil CollectionPosted in How To on February 1, 2009
Jeep TJ and JK Wranglers aren't the only rigs out in the backcountry, but they do represent a big, fat chunk of the rigs you'll find there. We decided to assemble a collection of suspension systems available for these popular rigs.
Why are TJ and JK Wranglers so popular? Brand loyalty is strong among Jeepers, but that's not the whole story. Jeep re-wrote the book on trail rig suspension in 1997 when it introduced the TJ Wrangler and incorporated coil springs, both front and rear, and solid axles in one maneuverable rig. That platform, called Quadra-coil, delivered a smooth ride, made suspension tuning easy to do, and completely eliminated axle wrap in one fell swoop. Jeepers wishing for a longer wheelbase and more interior room were granted the TJ Unlimited in 2005 and the four-door version of the JK in 2007. Die-hard Jeepers will always drive Toledo's finest, but the TJ and JK are formidable enough to lure drivers of other rigs and brands into a TJ or JK driver's seat.
If you already have one of these rigs, the next few pages offer several ways to clear the way for bigger donuts and further improve ride quality and control. If you're considering your next rig purchase, the next few pages just might turn you toward the ways of the Wrangler. Here's the latest Quadra-coil collection.
Product: Rough Country TJ Wrangler 2.5-Inch Lift Kit
Key Features: This kit is easy to install and does not require major modifications be made. Progressive-rate coil springs clear the way for up to 32-inch tires. The coils are wound to provide a ride that's both stable on the pavement and flexy and compliant on the trail. Rough Country's 2.2 Performance shocks feature a 41.4mm piston to create 40 percent more displacement compared to traditional shocks. The gas-charged Performance 2.2 shocks use 17.5mm chrome-hardened rods for strength and incorporate an internal rebound disc to control the suspension characteristics at full droop. At full compression, an external bump stop surrounds the shock shaft and keeps the vehicle under control when the wheels are stuffed.
For more information, contact: Rough Country(800) 222-7023www.roughcountry.com
Product: Skyjacker Suspension Systems for the JK Wrangler
Key Features: Skyjacker offers several systems for the JK, ranging in lift heights from 2-1/2 inches all the way up to 7 inches. Both long-and-short arm styles are offered, and the Skyjacker JK product lineup includes kits for both the two- and four-door JK Wranglers. With a wide range of JK suspension systems, Skyjacker has your suspension needs covered.
For more information, contact: Skyjacker Suspension(318) 388-0816www.skyjacker.com
Product: KORE Performance Long Travel JK Suspension
Key Features: KORE's long-travel JK suspension kit is built by a company with decades of Baja racing experience to its credit. KORE's long-travel JK kits are completely bolt-on and require no cutting or welding. The KORE JK kit is available in "Technical Series" trim featuring Fox racing shocks with proprietary internal valving, or in "Recon Series" trim featuring Bilstein 5100 shocks, also with proprietary internal valving. The variable-rate coil springs are more supple than their stock counterparts. Lift height is 4-1/2 inches and provides clearance for 35-inch tires. The big news is not the lift height, it is the articulation, which is nearly twice what's delivered from the factory. Factory drive line and steering geometries are retained.
For more information, contact: KORE Performance(760)749-8687www.koreperformance.com
Product: Rugged Ridge ORV TJ And JK Suspension Systems
Key Features: Rugged Ridge uses factory rates on all of its powder-coated coil springs, which are said to not sag over time. High-density polyurethane bushings are used at each end of the powder-coated steel control arms. ORV shocks are nitrogen-charged for consistent performance. Rugged Ridge offers more than 20 suspension systems for the TJ and JK, so there's a kit in the Rugged Ridge lineup that's right for your Wrangler.
For more information, contact: Rugged Ridge, a division of Omix-Ada(770) 614-6101www.omix-ada.com
Product: BDS Suspension JK Long-Arm Suspension Systems
Key Features: The four-link BDS long-arm kits are available in 5-1/2- and 6-1/2-inch lift heights and offer improved caster angles for more stable handling at speed. The link arms feature re-buildable and greasable ends for long-term performance and reliability. The front and rear track bars are re-located for proper roll center height. BDS Pro-Ride coil springs are built for repeated cycling over time without sagging. The systems also include forged dropped pitman arms, bump stop extensions, Kevlar-lined extended brake lines, and BDS Ultimate sway bar disconnects. As always, BDS products are covered by the BDS "No Fine Print" warranty.
For more information, contact:BDS Suspension(517) 279-2135www.bds-suspension.com
Product: Performance Accessories 2-Inch Body Lift For The JK Wrangler
Key Features: A body lift is not a suspension system, but it is the least expensive way to clear the way for taller tires. Body lifts may be combined with suspension systems to clear larger tires at lower suspension lift heights. The Performance Accessories JK Wrangler 2-inch body lift comes with nylon-reinforced body mounts, a high-grade steering column extension, heavy-duty hardware, and thread locker. The newly-created space between the frame and body can be covered with a set of Performance Accessories Gap Guards. Adding a 1-3/4-inch leveling kit, such as that offered by Trailmaster Suspension, and your JK will clear 35-inch tires. The combined cost of the body lift, Gap Guards, and the leveling kit is a more economical way to go than using a complete suspension kit to clear larger tires, and the 35s will dramatically increase your JK's off-road capability.
For more information, contact:Performance Accessories, a division of Performance Automotive Group(928) 636-7080www.p-a-g.net
Product: Zone Offroad Products TJ Wrangler 2-inch Budget Boost Suspension Lift
Key Features: This 2-inch lift kit is designed to be both functional and affordable. Urethane spacers are used to gain lift height, but Zone's kit goes much further. This is a complete kit that includes bump stop extensions, shocks, and the needed hardware for a hassle-free installation. The bump stop extensions prevent over-compression of the factory coil springs, and the twin-tube shocks are tuned specifically for the TJ. The urethane spacers are manufactured using a UV stabilizer for long-term durability (the spacers won't break down when exposed to sunlight) and the correct durometer (firmness) to absorb vibration and impacts. All the kit components are built in the U.S.A., and Zone makes its product available directly from its website.
For more information, contact:Zone Offroad Products(888) 998-9663www.zoneoffroad.com
Readylift 3-In-1 Adjustable Lift Spacers For The JK Wrangler
Key Features: ReadyLift's adjustable spacers allow JK owners to choose between 1-, 1-1/2-, and 2-inch front lift heights with one easy-to-install spacer kit. Installation is simple, involving no welding, cutting, or drilling. The spacers are machined from 6061 T-6 billet aluminum and installation hardware is included. No modifications to the factory suspension are required: just install the spacers in the front coil buckets and you're done. The ReadyLift spacers provide enough lift to run 33-inch tires.
For more information, contact:ReadyLift(800) 549-4620www.readylift.com
Product: Zone Offroad Products 3-Inch JK Wrangler Lift System
Key Features: Zone Offroad Products' 3-inch JK Wrangler lift system makes fitting 35s a reality even with a basic budget. The coil springs are designed not to sag over time, and the twin-tube shocks are tuned to maintain factory ride characteristics. The kit includes bump stop extensions, extended sway bar end links, and a rear track bar re-location bracket. This kit can be purchased directly from Zone Offroad's website.
For more information, contact: Zone Offroad Products(888) 998-9663www.zoneoffroad.com
Product: Revtek JK 3-Inch Lift System
Key Features: Revtek's 3-inch lift system for the JK Wrangler uses spacers to lift the front end three inches, and the rear one inch. This gives enough room for 35s and maintains the factory ride. A pair of Revtek shocks is included for the front, while the rear retains the factory shocks. There's also an adjustable Revtek track bar for the front, and a pair of front brake line drop brackets. The rear suspension is completed with a track bar re-location bracket. The kit includes all necessary hardware and the installation, which requires neither cutting nor welding, takes about two hours.
For more information, contact:Revtek Suspension(877) 543-8869www.revtek.com
Product: Full-Traction TJ Wrangler Long-Arm Systems
Key Features: Full-Traction's Long Arm systems are available in 4- and 6-inch lift heights. These systems are true long-arm systems that maintain the factory's four-link front suspension design for restriction-free axle movement. Caster remains correct throughout the entire suspension stroke. The rear suspension improves on the factory configuration with a triangulated upper link that does away with the need for the rear track bar. As such, the rear axle does not move side-to-side as it cycles up and down. Handling is improved over stock. Lower suspension links are made using thick-wall (.250-inch) tubing for supreme dent and bending resistance, and all brackets are crafted from 1/4-inch thick laser-cut steel plate. This is a bolt-on system, so welding is not required for installation. Optional Full-Traction M-Force or FS5100 shocks are sold separately.
For more information, contact: Full-Traction Suspension(800) 255-6464www.full-traction.com
Product: Full-Traction JK Wrangler Long-Arm Systems
Key Features: These 4- and 6-inch long-arm systems from Full-Traction suspension are available for the 2- and 4-door JK Wranglers. True long-arm systems, Full-Traction's JK kits retain the factory four-link suspension configuration for unrestricted axle movement and superior handling. Bushings last longer, and the suspension does not bind on itself when the factory-style four-link configuration is retained. Two-inch by .250-wall DOM tubing is used for the lower arms, and the bracketry is made from 1/4-inch laser cut steel plate. No welding is required to install these systems.
For more information, contact: Full-Traction Suspension(800) 255-6464www.full-traction.com
Product: Poly Performance Synergy Suspension Systems For The JK Wrangler
Key Features: The Synergy series systems are available in multiple stages and multiple lift heights for the 2- and 4-door JK Wranglers. Lower links are made from 1-3/4-inch by .188-wall DOM tubing and incorporate tried-and-true Currie Johnny Joints for unrestricted movement and longevity. Control arms are easily adjustable using Poly's adjuster sleeve and pinch bolt system. Front and rear track bar re-location brackets improve handling both on- and off-road. The Synergy systems can fit up to 40-inch tall tires and give a smooth, quiet ride while being ready for the punishment of your local trails and more famous routes such as the Rubicon.
For more information, contact:Poly Performance(805)783-2060www.polyperformance.com
Product: Pro Comp Suspension TJ Wrangler Dual Sport Long-Arm System
Key Features: Pro Comp's racing heritage bleeds through into this TJ Wrangler system. The lower control arms are made using 3/16-inch thick boxed steel plate for strength and impact resistance, and the kit comes with a set of Fox Racing Shox that use proprietary Pro Comp valving. The rear suspension uses triangulated upper links, allowing the rear track bar to be eliminated. Aerospace-grade rod ends are used, and the central belly pan/skid plate is easily removable for drivetrain access. This system lifts your TJ four inches and clears the way for 35-inch tires.
For more information, contact:Pro Comp(800)776-0767www.procompmotorsports.com
Product: Tuff Country EZ Flex JK Wrangler 4-Inch Suspension System
Key Features: Tuff Country's suspension links are adjustable so that ideal geometry can be dialed in during installation. Spherical rod ends allow high misalignment for maximum articulation without binding. This suspension system includes bump stop extensions, extended brake lines, and shocks for a complete system that's easy to install.
For more information, contact:Tuff Country(800) 288-2190www.tuffcountry.com
Product: Teraflex Jk Elite Lcg 6-Inch Long-Arm System
Key Features: This 6-inch lift system includes adjustable link arms for easy tuning and setup. Anti-dive properties have been optimized for stable front end geometry during braking. Anti-squat properties have also been optimized to ensure optimal traction under power. Front and rear roll center characteristics have been improved for better handling in the corners. The control arms incorporate spherical rod ends for bind-free movement. The Teraflex JK LCG 6-inch long-arm system is designed to clear up to 38-inch tires.
For more information, contact: Teraflex(801) 288-2585www.teraflex.biz
Product: Teraflex Dual Rate S/T Sway Bar System For The TJ Wrangler
Key Features: The Teraflex dual-rate sway bar system offers a stiffer rate for the pavement and can be disconnected on the trail. When the street rate is disconnected during trail use, a lighter-rate sway bar takes over and provides just enough resistance to control body roll and ensure the tires have adequate contact pressure with the terrain. The Teraflex dual-rate sway bar is easy to disconnect and re-connect, and installation is simple. While this is not a suspension system, it does aid handling on the street and on the trail, and can be combined with stock or aftermarket suspension systems.
For more information, contact: Teraflex(801) 288-2585www.teraflex.biz
Product: Rubicon Express Rear Radius Arms For The TJ Wrangler
Key Features: Rubicon Express pioneered the front long-arm radius arm suspension system for the TJ Wrangler. Superior ground clearance, simplicity, and ruggedness were the results. Rubicon Express has now taken that success and applied it to the TJ rear suspension. The Rubicon Express radius arm design means ground clearance that exceeds four-link systems. The rear long arm radius arms are adjustable so the ideal rear pinion angle can be dialed in. Rubicon Express radius arm systems come with properly-valved Rubicon Express shocks for sure-footed traction and stable handling. Rear radius arm systems are part of complete Rubicon Express suspension systems and are available for the TJ and the TJ Unlimited.
For more information, contact: Rubicon Express(877) 367-7824www.rubiconexpress.com
Product: Trailmaster 5-Inch Suspension System For JK Wrangler
Key Features: Trailmaster's 5-inch lift system for the JK Wrangler comes with new links, Trailmaster SSV shocks, extended Kevlar-lined brake lines, coil springs, and extended front sway bar end links. The JK's CV drive shafts don't hold up if the vehicle is lifted over three inches, so this kit also includes a pair of upgraded drive shafts. If you have already upgraded your drive shafts, this kit is also available without them. The links are built using .156-wall DOM tubing, and incorporate high-misalignment flex-joints and greasable bushings for high performance, easy maintenance, and long life. This system is designed to clear up to 37-inch tires.
For more information, contact: TrailMaster, a division of Performance Automotive Group(928) 636-7080www.p-a-g.net
Product: Old Man Emu Suspension Systems For The TJ And JK Wranglers
Key Features: Old Man Emu (OME) suspension systems are available for the TJ and JK Wranglers. OME suspension is based on carefully selected spring and shock damping rates that are specifically tuned to a particular vehicle and the load it will be carrying. Customers can choose "Light" or "Heavy" applications and be assured that the Old Man Emu kit they receive will be tuned to their Jeep's needs. For customers wishing to customize their suspension further, OME offers its kit components a la carte as well.
For more information, contact:Old Man Emu, imported from Australia by ARB USA(425)264-1391www.arbusa.com
Product: Rock Krawler Suspension X Factor Plus Suspension System For The JK Wrangler
Key Features: The X Factor system uses adjustable, high-clearance lower control arms both front and rear for precision chassis setup and tuning. The rear track bar is eliminated and replaced with a wishbone-style three-link for bind-free articulation, and the X Factor rear suspension gives JK owners adjustable anti-squat geometry. Small details have been attended to: front spring retainer clips keep the coils in place when the suspension reaches full droop, and the rear shock re-location brackets improve ground clearance. Two versions of the kit are available: a 3.5-inch lift for use with 35-inch tires, and a 5.5-inch lift for use with 37-inch tires. The Rock Krawler lineup includes suspension for most Jeep models, including TJ and YJ Wranglers.
For more information, contact:Rock Krawler Suspension(518) 270-9822www.rockkrawler.com
Product: Currie Rockjock Suspension System For The JK Wrangler
Key Features: The RockJock JK off-road suspension system allows for efficient clearance of up to 37-inch tall tires (with minor trimming) on any model of the two-door or four-door Jeep JK Wranglers. Kits allow for up to 11 inches of rear-wheel travel and 9-1/2 inches of front wheel travel when used with the recommended shocks. Up to 11 inches of front travel is attainable when used with specific shocks and some minor trimming. Includes 8 Johnny Joint 4 lifted coil springs, front and rear bump stop kits, rear coil spring retainers, D.O.T. stainless braided extended brake line kits, front and rear track bar relocators, shock relocation kits, adjustable sway bar links, and a dropped pitman arm. Shocks are sold separately.
For more information, contact:Currie Enterprises(714) 367-2685www.rockjock4x4.com