The RubiCrawler Deluxe Package for 2007-2011 Jeep Wrangler JK with 42RLE automatic transmission is the complete turnkey auxiliary reduction solution that doubles your available gear ratios. This premium package includes everything needed for professional installation: the 2.72:1 RubiCrawler planetary reduction unit, heavy duty transfer case cable with heim joint connections, JK-specific twin stick shifter, anodized billet aluminum knobs, and RubiCrawler Control Module for full electronic integration.
What You Get - Complete Package: This deluxe package includes the RubiCrawler 2.72:1 reduction unit that replaces your 42RLE tailhousing, upgraded heavy duty transfer case shift cable with reinforced heim joints replacing weak factory connections, twin stick cable shifter designed for factory JK console mounting, premium anodized aluminum shifter knobs, RubiCrawler Control Module for Rubicon differential locks and sway bar disconnect, all gaskets and mounting hardware, and detailed installation instructions. Everything you need in one complete package.
Gear Ratio Combinations: The RubiCrawler multiplies your existing transfer case ratios by 2.72:1 when engaged. With stock NP231 transfer case you get high range 1:1 for normal driving, low range 2.72:1 for moderate trails, and ultra-low 7.40:1 for extreme rock crawling. With Rubicon NP241 Rock-Trac you get high range 1:1 normal, mid-low 2.72:1, transfer case low 4.0:1 for serious terrain, and ultra-low 10.88:1 for competition-level obstacles. Four gear ratio options instead of two.
Why the Heavy Duty Cable Upgrade Matters: The factory JK transfer case cable uses plastic ends and stamped brackets adequate for stock use but prone to flex and failure under RubiCrawler loads. This deluxe package upgrades to precision heim joint connections that eliminate flex, reinforced cable housing preventing stretch, and CNC-machined aluminum brackets. Essential for reliable operation during serious off-roading.
How It Works: The RubiCrawler replaces your 42RLE transmission tailhousing with a 6-gear planetary reduction unit. It's the exact same length as the factory tailhousing so nothing moves - your transfer case stays in place, driveshafts remain stock length, and all mounts stay factory. The custom input gear connects to your transmission main shaft while the 23 spline output connects to your transfer case. Bolt-in installation with zero permanent modifications. The twin stick shifter gives independent control of RubiCrawler and transfer case.
Benefits: Ultra-slow crawling speeds down to 0.25 mph for technical terrain, reduced automatic transmission heat by keeping engine RPM higher at crawl speeds, optimized engine performance keeping the 3.8L V6 in its powerband, superior traction control with precise throttle modulation, and competition-level crawl capability. Compatible with lifted JKs, larger tires, upgraded axles, and all common modifications.
2007-2011 JK Only: This package fits 2007-2011 JK Wranglers with 42RLE automatic transmission only. These are JKs with the 3.8L V6 engine. Does NOT fit 2012+ JK models which use different transmissions. Verify you have 42RLE before ordering.
RubiCrawler Control Module: Essential for Rubicon models to activate electronic locking differentials and sway bar disconnect when RubiCrawler is engaged. Plug-and-play installation with no wire cutting. Updated November 2023 with new wire color coding for easier installation.
Specifications: 2.72:1 reduction ratio, 6-gear planetary design, shares lubrication with 42RLE transmission using ATF+4 fluid, shift-on-the-fly up to 20 mph, zero length added to drivetrain, approximately 40 pounds, Made in USA. Package includes RubiCrawler unit, HD cable, twin stick shifter, aluminum knobs, control module, and all hardware.
Installation: Professional installation recommended, typically 6-8 hours. Requires proper transmission disassembly, fluid fill procedures, and cable routing. Compatible with stock and lifted JKs.
Why This Deluxe Package: Buying these components separately costs significantly more. This complete package ensures all parts work together perfectly with no compatibility issues. Heavy duty cable, control module, and aluminum knobs included - not cheap add-ons.