Rock Krawler 3.5 Inch T-Rex Pro Elite No Limits Hybrid System - Jeep JLU 4-Door

This is the full-spec T-Rex hybrid for a Rubicon 4xe: Pro Elite billet aluminum lower arms plus No Limits front sway bar links for the factory electronic disconnect. The layout is a high-clearance mid arm front, because the 4xe's cooling and high-voltage lines block a full long arm, and an ultra-high-clearance 3-link rear with X2 geometry.

What's in the kit

• (4) Triple-rate coil springs
• (4) Spring correction seats
• (1) Front adjustable anti-wobble track bar
• (1) Front No Limits sway bar kit
• (2) Front billet 7075 aluminum adjustable lower control arms
• (2) Front adjustable upper control arms
• (2) Rear billet 7075 aluminum lower long arms
• (2) Rear extended sway bar links
• (1) Rear upper control arm
• (2) Rear lower control arms
• (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 mounts

Shocks depend on the package you pick below. Bump stops come with every shock option; if you go with no shocks they can be ordered separately (Rock Krawler part RK07124).

Why this system

• Full high-clearance 4-link mid arm front suspension paired with a 3-link long arm rear.
• The 3-link rear with a track bar removes the natural bind of the factory parallel 4-link rear, so the axle moves without jacking.
• X2 rear geometry gains 4.5 inches of clearance under the rear axle without giving up rear shock travel, raises the rear roll center and adds adjustable anti-squat.
• Every control arm uses Adventure Series joints, so there is nothing to grease.
• Triple-rate coil springs with correction seats for a comfortable ride on the street.
• Pro Elite billet 7075 aluminum lower arms, front and rear, CNC machined and service free.
• No Limits: front sway bar links made for the factory electronic sway bar disconnect on Rubicon models, with factory-size hardware, a CNC-machined billet aluminum center section and Made in USA heim joints from FK Bearing. Install them, press the button and hit the rocks.
• Lifetime warranty coverage.

Pick your package

• Base System (No Shocks). The kit as listed above with no shocks, for the builder who already has shocks picked out. Bump stops come with every shock option; with this one they're ordered separately.
• Bilstein 5100 Shocks. The kit plus Bilstein 5100 shocks. Rock Krawler calls them maintenance free and a great pairing with its multi-rate coil springs.
• Stage 1 (RRD 2.25 inch IFP shocks). Rock Krawler's in-house shock: a 2.25 inch hard anodized fluted aluminum body with the cooling surface of a 2.5 inch shock, a 3/4 inch hard chrome stainless steel shaft, billet aluminum valving and dual DU shaft bearings. Serviceable, rebuildable and revalveable.
• Coilover Comp System, Stage 1. Coilovers up front, coil springs and a shock in the rear: 2.625 inch RRD racing coilovers with remote reservoirs up front (12 inches of travel, about 13.3 inches of front axle travel) and matching 2.625 inch RRD racing shocks in the rear (11.5 inches of travel, about 12.8 inches of rear axle travel). Rock Krawler pitches it at owners who want coilover adjustability but still carry small loads or tow small trailers. Includes (2) triple-rate coil springs and (2) correction seats.
• Coilover Comp System, Stage 2 (Fast CD). The same Comp System layout and travel as Stage 1, with Fast CD (compression damping) adjusters on the coilovers and the rear shocks for more tuning range.
• Coilover Trail Runner, Stage 1. Coilovers at all four corners: 2.625 inch RRD racing coilovers with remote reservoirs front and rear (12 inches of front travel, 11 inches in the rear). Rock Krawler notes rear coilovers don't take changing loads as well, so heavy towing or a loaded bed isn't ideal.
• Coilover Trail Runner, Stage 2 (Fast CD). The Trail Runner layout with Fast CD (compression damping) adjusters on the coilovers for even more tuneability.

Fitment and what else you'll need

Fits the 2018 and newer Jeep Wrangler JLU (4-door): 4xe models.

Rock Krawler bases all lift heights on Rubicon models in a standard build (front bumper and winch, rear bumper and full-size spare). If you delete the spare, drop 1 inch of rear coil lift height; for an overland or heavily loaded rear build, go up 1 inch.

• Rubicon: 37 inch tall tires want 4.5 inches of backspacing and 40 inch tall tires want 3.5 inches. With full OEM fenders, 37 or 38 inch tires fit; with trimmed or high-lined fenders, 40 inch tires fit (3 inch bump stop height recommended).
• Requires welding of the rear long arm mounts.
• Requires removing the OEM frame side upper and lower rear control arm mounts and the OEM axle side rear lower control arm and track bar mounts.
• Requires modifying the OEM rear shock mounts and welding on the raised rear upper shock mounts.
• Rock Krawler recommends a new front C.V. driveshaft for any front shock with a max extended length over 29 inches.
• Limiting straps are recommended once the vehicle is set up, to avoid over-extending suspension components.

Rock Krawler lists lifetime warranty coverage on this system. Posted lead times from Rock Krawler, in business days from order: mid arm kits 1 to 2 weeks, long arm kits 3 to 4 weeks, 2.25 inch shocks 1 to 2 weeks and 2.625 inch shocks or coilovers 3 to 4 weeks.