Dual Case

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The Marlin Crawler Dual Case System

Our TacoBox installed in a 2002 3.4-liter Tacoma
2002 3.4-liter Tacoma

Installing a Dual Transfer Case Setup in your rig is the only way to build a fully capable Rock Crawler. A dual transfer case adapter is a device that adds an additional low range reduction gear set to your truck. It is sometimes called a doubler because one dual case adapter doubles the number of low range gear sets in your truck (your t/case's low range + a second low range). Installing two dual case adapters results in a triple setup where you have two new low range gear sets plus your t/case's low range gear set. All Marlin Crawler dual case units are known as Crawl Boxes. Like the term Rock Crawling, a Crawl Box is a Marlin Crawler-specific term that Marlin invented back in 1994.

  • Increased Traction

  • Increased Torque

  • Increased Control

  • Increased Reaction Time

John Drives BigMike's Truck at 511:1
Discover how a Marlin Crawler
can make your truck unstoppable!
  • Less Bouncing

  • Less Breakage

  • Less Trail Abuse

  • Less Risk


Gear Drive 4cyl 1979-95 Hilux/4Runner

Chain Drive 6cyl 1988-95 Hilux/4Runner, 1993-94 T100

Gear Drive-Conversion 6cyl 1988-95 Hilux/4Runner, 1993-94 T100

Chain Drive 2003+ 4Runner, 2005-15 Tacoma, 2007+ FJ Cruiser

Land Cruiser