Rock Krawler 4.5" T-REX Suspension System for Jeep Wrangler JL (Gas Models)
The Rock Krawler Suspension T-Rex Hybrid Long-arm Systems are the absolute best combination of on-road ride/handling and off-road ability you can get for your Wrangler JL 2 Door when keeping the gas tank in the stock location. Don’t shoot the messenger here, but Jeep killed the availability of putting full long arm systems in the front end of 2018 and newer 2 door applications due to the new fuel tanks that go up and over the crossmember all the way to the OEM front lower control arm mount on the frame. We promise it was not our idea! This vary fact is what made us create the Hybrid T-Rex System. The T-Rex is a full high clearance mid-arm front setup with our tried and true ultra high clearance 3 link rear conversion. This gives you the absolute best possible combination to enhance your 2 Door Wrangler Off-Road. The stock front suspension geometry on JL/JLU applications is really not terrible and is workable. The rear suspension geometry being a parallel 4 link with a track bar (i.e. 5 link rear) is really where the lack luster performance comes into play. This suspension arrangement naturally binds causing jacking when being tasked to perform off road. The Rock Krawler ultra high clearance 3 link with track bar removes the natural binding of stock rear suspension 100% allowing for ultra smooth suspension motion in the rear without jacking. A night and day difference. You also get the benefit of X2 rear suspension geometry gaining 4.5” of ground clearance under the rear axle without losing a single centimeter of rear shock travel! The rear roll center is raised significantly to further enhance handling and reduce side to side axle shifting while off-road. Make no compromise suspension geometry wise is our motto and T-Rex is no exception. All T-Rex control arms feature our exceptionally proven Adventure Series Joints for years of maintenance free use!
|
System Benefits:
- Excellent Highway Ride & Off-Road Ability
- Maintenance Free/ High Ability Control Arms Featuring our Award Winning Adventure Series Joints
- Full High Clearance Design
- 4 Link Mid-arm Front Suspension
- 3 Link Long-arm Rear Suspension
- 4.5" Rear Clearance Gain from the X2 Axle Bracket System
- Adjustable Rear Anti-Squat Featuring X2 Geometry
- Designed to be the Ultimate Compromise between On Highway Handling and Hard Core Off-Road Ability
- Lifetime Warranty Coverage
|
System Includes:
- (4) Triple-rate Coil Springs
- (4) Spring Correction Seats
- (1) Front Adjustable Anti-wobble Track Bar
- (1) Front Sway Bar Disconnect Kit
- (2) Front High Clearance Adjustable Lower Control Arm
- (2) Front Adjustable Upper Control Arm
- (2) High Clearance Lower Long-Arms
- (2) Rear Extended Sway Bar Links
- (1) Rear Upper Control Arm
- (2) Rear Lower Control Arm
- (1) Rear Long-arm Mount Kit
- (1) Rear Upper Frame Mount
- (1) Rear Track Bar Mount
- (1) Rear Adjustable Track Bar
- (1) Rear Axle Truss
- (1) Rear Brake Line Mount Kit
- (2) Rear Shock Mount
(*DEPENDING ON SHOCK PACKAGE CHOSEN*)
- Bump Stops Are Included with All Shock Options
- IF YOU CHOOSE NO SHOCKS - BUMPSTOPS CAN BE PURCHASED SEPARATELY - RK07124
|
Shock Information:
- All RRD Shocks and Coilovers are Designed and Built in-house
- Generic Front Shock Length – 18.31” Collapsed/ 30.31” Maximum Extended
- Generic Rear Shock Length – 19” Collapsed/ 31” Maximum Extended
Bilstein 5100 Shocks
- A Great Pairing with Our Multi-rate Coil Springs
- Maintenance Free
RRD 2.25" IFP Shocks
- 2.25” O.D. Military Grade Hard Anodized Fluted Aluminum Shock Body
- Cooling Surface Area of a 2.5” Shock
- 3/4” 17-4 PH Stainless Steel, Hard Chrome Plated and Polished Shaft
- Billet Aluminum Valve Circuit and Components
- Dual DU Shaft Bearings and Double Redundant Sealing Methods
- Built in-house
- Serviceable/Rebuildable/Revalveable
- More Info
|
|
Wheel Fitment:
Sport and Overland Wheel Fitment Recommendations
- 37”/38” Tall Tires - Recommend 3.5” of Back Spacing
Mojave Fitment Recommendations
- 37” Tall Tires – Recommend 4.5” of Back Spacing
- 40” Tall Tires – Recommend 3.5” of Back Spacing
|
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)
Mojave with Full OEM Fenders
- 37”/38” Tall Tires (3” Bump Stop Height Recommended)
Mojave with Trimmed or High Lined OEM Fenders
- 40” Tall Tires (3” Bump Stop Height Recommended)
|
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 or heavily upfitted build in the back, we recommend upsizing 1” in coil lift height for the rear.
- Recommend a new front C.V. driveshaft for all front shocks with max. extended length greater than 29"
- Requires welding of the Rear Long Arm Mounts
- Requires removal of the OEM frame side upper/lower rear control arm mounts
- Requires removal of the OEM axle side rear lower control arm and track bar mounts
- Requires modifying the OEM rear shock mounts and welding of the raised rear upper shock mounts
- Recommend installing limiting straps to avoid over extension of suspension components after vehicle is all set up
|
