The Rock Krawler Suspension JT 4.5 inch Silverback Long-Arm System is the ultimate in compromise between daily driver/hard core off-roader. The Silverback systems combine the benefits of a full high clearance 4 link front suspension with a high clearance triangulated 4 link, Mid-arm rear suspension. Say goodbye to greasing your joints, our service free longarm system is here to stay. In every single control arm, we have our Adventure series joint center, which isolates harsh road vibrations equivalent to an OE bushing, includes high misalignment, and is fitted with a steel sleeve (that the bolt passes through) which rotates freely on a additional Teflon lined inner sleeve to insure that you are never chafing, twisting, or deforming the bushing material inside the housing as you blast through the mud, sand, sleet, salt, snow, dirt and dust. To finish it off, as you tighten your control arms into the mounts, the sleeve of the joint is engineered to be the buffer between the clamping force of a bracket, which means that as you tighten everything, you are not compressing the bushing. This all makes for an incredibly long lasting joint that never requires a drop of grease, and makes zero noise inside the housing. The triangulated 4-link rear assembly keeps the rear axle perfectly centered; allows for removal of the rear track bar, eliminates rear suspension bind, and the cross talk of the front and rear track bar arrangement, therefore greatly smoothing the highway ride. Our industry leading, Adventure - X mid-Arms feature adjustable upper and lower control arms and offer a total of 70 degrees of misalignment when paired with our Adventure series Joints at the frame connection and at the axle. The inherent bind in a factory JT control arm is greatly reduced. With so much adjustability, it allows you to precision tune the JT's caster and pinion angle front and rear. Driving you home with the most comfortable ride possible in a Gladiator, are our TRIPLE RATE front coils and QUAD RATE rear coils. All 4 coils work together to achieve excellent on-road comfort that we feel is better than the OEM springs. The coil itself is built with the proper "Free-length" for off-road articulation and stays firmly seated in the coil bucket (as long as a proper length shock is installed), and overall, a very controlled reaction to bumps, rocks, sand, mud and whatever else you can manage to throw at them! All Rock Krawler JT systems include correction pads that reduce the spring bow inherent in the factory set up. The provided track bar geometry corrections, up front and removal of it in the rear in favor of triangulation, lets you perfectly center the axles so there is no compromise in on road handling.
When we design a system, our goal is to provide you with the most comprehensive solution and the best geometry, install exceptional value, and be the foundation for every adventure whether it be on the Street, In tow, or down a Trail! Thank you for considering Rock Krawler Suspension
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System Benefits:
- Complete bolt in system
- Excellent highway ride and handling
- The best off-road ability of all Mid Arm Systems
- Improved rear roll center
- Tuned Triple Rate Coils
- Spring Correction Seats
- Vehicle lean correction
- Upgradable to RK Longarm System
- Best Technical support in the industry
- Jeep remains level on all 4 corners
- Lifetime Warranty Coverage
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System Includes:
- (1) Weld-on front long arm mounting system
- (1) Heat Shield Products Sticky Shield Kit
- (1) Front adjustable anti-wobble track bar
- (2) High clearance Adventure-X2 front lower control arms
- (2) Adjustable front upper control arms
- (1) Front sway bar disconnect kit
- (2) Triple rate front coil springs
- (2) Quad rate rear coil springs
- (4) JT coil spring correction seats
- (2) Weld-on rear frame side long arm mounts
- (2) Rear adjustable lower control arms
- (2) Rear adjustable upper control arms
- (2) Rear spring pads
- (2) Extended Rear brake lines
- (1) Carrier bearing drop Bracket
- (2) Adjustable rear sway bar links
- (1) Rear Bolt on Pro-X Cradle (Welding optional)
- (2) Rear triangulated upper arms.
(*DEPENDING ON SHOCK PACKAGE CHOSEN*)
- Bumpstops are included with all shock options
- IF YOU CHOOSE NO SHOCKS - BUMPSTOPS CAN BE PURCHASED SEPARATELY - RK07464
- 2.25"RRD shocks / Coilovers w/Coils / 2.625 RRD Remote Reservoir Shocks
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Shock Information:
Bilstein Shocks:
- FRONT: RRD04056-B51
- REAR: RRD04059-B51
- requires 3" bump stops both front and rear
RRD Spec'd 2.25" Shocks: IN-HOUSE Designed and built - 2.25" Fluted aluminum construction, hard coat military grade black anodizing, 7/8" shaft, IFP (Internal floating piston), better bushings to achieve better misalignment, fully serviceable and rebuildable
- RRD Spec Front Shock
- Part Number RRD02287
- RRD Spec Rear Shock
- Part Number RRD02397
- FULL PACKAGE = RRD02401
- requires 3" bump stops both front and rear
Remote Reservoir 2.625" Coilover Shocks: Remote reservoir standard, IFP construction, MASSIVE 2.625" shock bodies, fluted aluminum bodies, 1" shaft, 1.25" mounting width, hard coat military grade black anodizing, fully serviceable and rebuildable.
- RRD Spec Front Remote Reservoir Coilover
- Part Number RRD07868RR
- RRD Spec Remote Reservoir (NON-Coilover) Rear Shock
- Part Number RRD07870RR
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Wheel Fitment:
- Sport and Overland Wheel Fitment Recommendations
- 37”/38” Tall Tires - Recommend 3.5” of Back Spacing
- Rubicon Fitment Recommendations
- 37” Tall Tires – Recommend 4.5” of Back Spacing
- 40” Tall Tires – Recommend 3.5” of Back Spacing
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Tire Fitment:
- Sport and Overland with Full OEM Fenders
- 37” Tall Tires (3” Bump Stop Height Recommended)
- Sport and Overland with Trimmed or High Lined OEM Fenders
- 38” Tall Tires (3” Bump Stop Height Recommended)
- Rubicon with Full OEM Fenders
- 37”/38” Tall Tires (3” Bump Stop Height Recommended)
- Rubicon with Trimmed or High Lined OEM Fenders
- 40” Tall Tires (3” Bump Stop Height Recommended)
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General Notes:
- All lift heights based on Rubicon models for standard style build (i.e. front bumper and winch, rear bumper and full size spare).
- If building with a spare delete we recommend dropping 1” in coil lift height for the rear.
- If building an "overland style" or heavily up-fitted build in the back, we recommend upsizing 1” in coil lift height for the rear.
- We recommend a new front driveshaft if you plan to off-road routinely.(Adam's Drivesahft,Tom Woods,J.E. Reel)
- Requires removal of the OEM shock mount off the frame (*If coilover system is purchased)
- Requires removal of the OEM shock and spring mount off the axle (*If coilover system is purchased)
- Requires welding of the new coil over mount on the axle only (*If coilover system is purchased)
- We recommend welding the rear cradle for use with 37" tires and above.
- OPTIONAL PRO - X CRADLE IS AVAILABLE FOR PURCHASE WHEN USING DYNATRAC OR ULTIMATE DANA 60 REAR AXLES - Dynatrac XD60 rear axle use: RK08078 and Ultim
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