Rubi Crawler Auxillary Crawl Box for 42RLE Transmission 

Pricing starting at $2,000.00 – comes with free shipping – call 888-316-2940 or email info@high-impact.net for a specific quote.

This units fits all Jeeps 2003 to 2011 with the 42RLE automatic overdrive. This reduction unit replaces the stock 42RLE tailhousing with a 6 gear planetary reduction box featuring a 2.72 low range. This is a true, bolt-in doubler that couples to the stock Jeep transfer case or an existing Atlas transfer case.

Ratio Possibilities:

Stock Transfer Case Functions:

With the Rubicrawler installed in any Jeep, The Normal two wheel drive feature of your Jeep does not change. The city or rural road handling of your Jeep is the same as it was the day you bought the Jeep.

Stock Transfer Case Functions with the RubiCrawler in High Gear:

Rubicrawler in high range and the transfer case in four wheel drive high range (all Jeeps). The gear ratio of the transmission does not change. This feature gives you power to all four wheels.

Rubicrawler in high range and the transfer case in four wheel drive low range (non Rubicon Jeeps). The final gear ratio with the transmission in any gear is reduced 2.72 times lower. This feature gives you power to all four wheels.

2a. Rubicrawler in high range and the transfer case in four wheel drive low range (Rubicon Jeeps). The final gear ratio with the transmission in any gear is reduced 4.0:1 times lower. This feature gives you power to all four wheels.

Stock Transfer Case Functions with the RubiCrawler in Low Gear:

Rubicrawler in low range and the transfer case in two wheel drive (all Jeeps). The final gear ratio with the transmission in any gear is reduced 2.72 times lower. This feature does not give you power to all four wheels, but provides slower speeds and more throttle response for easy trail use. The nice feature of this is that you have more torque and better handling.

Rubicrawler in low range and the transfer case in four wheel drive high range (all Jeeps). The final gear ratio with the transmission in any gear is reduced 2.72 times lower. This feature give you power to all four wheels and provides a shift on the fly option for four wheel drive. The New Process transfer case can be shifted into high ratio on the fly; so if you’re in sand, mud or offroad trail and need power to all four wheels this is a great option.

Rubicrawler in low range and the transfer case in four wheel drive low range (non Rubicon Jeeps). The final gear ratio with the transmission in any gear is reduced 7.40 times lower. This feature gives you power to all four wheels. This is an extreme crawl ratio that provides a slow controlled approach to an obstacle.

3a. Rubicrawler in low range and the transfer case in four wheel drive low range (Rubicon Jeeps). The final gear ratio with the transmission in any gear is reduced 10.88 times lower. This feature gives you power to all four wheels.   This is an extreme crawl ratio that provides a slow controlled approach to an obstacle.

Ratio possibilities with a –
Stock New Process 231/241 are a 2.72:1 and a 7.40:1
Stock NP Rocktrac are a 2.72:1, 4.0:1 and a 10.88:1
Atlas 2.0 are 2.0:1, 2.72:1 and a 5.44:1
Atlas 3.0 are 2.72:1, 3.0:1 and a 8.16:1
Atlas 3.8 are 2.72:1, 3.8:1 and a 10.44:1
Atlas 4.3 are 2.72:1, 4.3:1 and a 11.70:1
Atlas 5.0 are 2.72:1, 5.0:1 and a 13.60:1

Selecting the Proper Shifter for your Application:

The RubiCrawler’s shifting mechanism utilizes push/pull cable technology for a smooth and easy shift.  The universal cable shifter is included with the purchase of your RubiCrawler. (The universal shifter should be used if your vehicle is equipped with an Atlas transfer case)

We also offer a twin stick cable shifter for the Jeeps.  These kits are designed to fit the stock TJ and JK consoles.

The Jeep TJ’s twin stick shifter replaces the standard hard linkage. We have designed a twin stick shifter that comes through the stock console for a clean installation that operates the RubiCrawler and the stock NP231 or NP241 transfer case.

The twin stick JK shifter also provides a twin stick shifter through the stock console. This kit retains the stock transfer case cable with the addition of the new RubiCrawler cable.

These shifters are an additional charge but are the best suited for most installations. (Note, if your vehicle does not have a stock transfer case, the universal shifter should be used.)