Turn your truck into a Rock Crawler
A Crawl Box will drastically lower your truck's final drive ratio. This is because you will have an extra low range gear set that you can engage. Your truck will be able to move very slowly, even with the clutch fully disengaged, even going uphill or downhill. Through different gear ratio options, the Crawl Box will instantly multiply your trucks final drive ratio. This provides more torque, control, and traction. Torque is increased by a larger gear ratio, control is increased by being able to drive through an obstacle at a slower pace, and traction is increased due to less wheel speed. Your truck will move a minimum of 56% slower, with gearing options available to move your truck up to 2,198% slower than stock! With a triple Crawler this number becomes even more outrageous.
So what's involved?
The Crawl Box is installed between your transmission and transfer case. Depending on the application, the Crawl Box has a total length ranging from 6.5" to 8.375". Three basic modifications are required to do this: 1) your front and rear drive line lengths will need to be adjusted, 2) your transfer case shift lever will need to be relocated reward, and 3) your 4WD shift light indicator wiring and speedometer cable (or wires) will need to be lengthened. In terms of weight, the Crawl Box weighs 40-50 pounds depending on the application. As for your crossmember, in most applications your stock Toyota crossmember may be reused with minor modifications, however we recommend using a proper dual case crossmember, such as a Budbuilt Budlite, because a dual case crossmember provides more support for the added weight and torque than the stock counterpart.
Sounds great! What are my options?
Toyota has developed two different types of transfer cases: Gear drive transfer case (direct reduction) and Chain drive transfer case (planetary reduction). The gear drive design originated with the Land Cruiser back in 1958 and its descendants were used in the Hilux until 1995. It has a very simple design with vast upgrade options that make this the stronger choice. The chain drive design originated with the 3.0-liter V6 Hilux back in 1988 and is still used today in the Tacoma, 4Runner, Tundra, and FJ Cruiser. Unfortunately it's planetary design does not leave any room for gearing options, and as such, very few upgrade options are available. However, the chain driver design is lighter, has an integrated oil pump so it runs cooler, and it features a synchromesh shift design that enables the operator to engage 4WD at highway speeds. These options are not available with the gear drive design.
We are able to build dual case transfer case systems ranging from center rear with right-hand front output, center rear with left-hand front output, and right-hand rear with right-hand front output. This versatility enables our product to fit nearly any Toyota ranging from 1960-1997 FJ40/45/50/60/62/80 Land Cruisers, 1979-1995 Hilux Pickups and 4Runners, 1993-1998 T100 Pickups, 1995-2010+ Tacomas, 4Runners, and Tundra 4WD trucks with either live axle or independent front axle designs.
We are currently in the process of updating the transfer case section of our website. We have many more applications and upgrade parts as well as a lot more information to add.
If you can't find the application for your truck on our website, please give us a call or use our online customer support community and we'd be happy to discuss the options available for your truck!