Eco-Crawler - Selectable dual-range gearing for Australian Toyota 4x4s.
Current Eco-Crawler Lead Time is 8-10 Weeks on all Variations
Northwest Fabworks – Innovation in Motion Since 2005
The NWF EcoCrawler adds an additional selectable 2.57:1 low-range reduction between your transmission and transfer case, giving your Toyota significantly more control and gearing off-road while retaining normal 1:1 operation when the EcoCrawler is in high range.
Designed specifically around Toyota's VF chain-drive platform, the EcoCrawler uses a CNC-machined 6061-T6 billet aluminum housing, a 4140 HTSR main shaft, and the planetary gearset from a donor VF transfer case.
For the Australian market, Toyota introduced VF chain-drive transfer cases in 1997. The EcoCrawler provides a compact dual-range solution without relying on outdated gear-drive transfer cases, multiple adapters or separate splined couplers.
What's Different About the RC61F Conversion EcoCrawler?
This kit comes with all the parts required to build the Eco-Crawler when swapping an RC61F into the KZN165 replacing the R151F. Shifters Sold Seperately.
What's Included in this Kit?
1x Conversion Eco-Crawler to allow a Right Hand Drop Transfer to bolt up to a Left Hand Drop Transmission
1x Twin Stick Top Shift Conversion Shift Rails
1x Eco-Crawler Electric Shift VF4 Donor Conversion Kit
2x Toyota Transfer Input Shaft Split Bearing 90364-28004
1x Toyota Transfer Input Shaft Oil Seals 36216-35012 (Pair)
What Does the EcoCrawler Do?
The EcoCrawler adds another selectable 2.57:1 reduction ahead of your existing transfer case.
With both the EcoCrawler and compatible factory transfer case in low range, the system provides approximately 6.60:1 double-low reduction.
This gives you substantially lower gearing for technical terrain, crawling, steep descents and situations where greater low-speed control is needed, while retaining normal gearing for street and highway driving.
How It Works:
The Australian EcoCrawler setup requires two VF chain-drive transfer cases: your transfer case and a donor case for the EcoCrawler planetary assembly.
Installation consists of:
- Selecting a donor VF case with a planetary assembly that matches the transmission output
- Removing the planetary assembly from the donor case
- Installing the planetary assembly into the EcoCrawler billet housing
- Installing the EcoCrawler between the transmission and transfer case
- Connecting the EcoCrawler to the transfer case through the NWF main shaft
There isn't a separate splined coupler required between the EcoCrawler and transfer case.
What You'll Need:
Depending on your configuration, you will need:
- VF chain-drive Toyota transfer case from the RC61F Transmission to provide the donor planetary assembly
- Right Hand Drop VF transfer case from the KZN165 to go behind the EcoCrawler
- NWF Trident Shifters, Top Shift with Universal Sticks
Specifications
| Specification | Australian EcoCrawler |
|---|---|
| Gear Reduction | Selectable 2.57:1 Low Range |
| Double Low | Approximately 6.60:1 |
| High Range | 1:1 |
| Overall Length | 6.5" |
| Housing Material | 6061-T6 Aluminum |
| Mainshaft Material | 4140 HTSR |
| Oil Capacity | Approximately 1.5 qt |
| Recommended Oil | Red Line MT-90 or factory-recommended chain-drive oil |
| Manufacturing | CNC Machined In-House by NWF |
Installation & Driveline Changes:
The Australian EcoCrawler adds approximately 6.5 inches between the transmission and transfer case.
Because the transfer case is moved rearward, driveshaft modifications will normally be required. Final driveshaft measurements should be taken after installation because vehicle configuration, suspension height and transfer-case combination can affect the required lengths.
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DISCLAIMER
THIS PRODUCT IS FOR OFF ROAD USE ONLY. THE PRODUCTS SUPPLIED IN THE DELIVERED KIT ARE MANUFACTURED AND ASSEMBLED SPECIFICALLY FOR THE PURCHASED CONVERSION TYPE. ALL MODIFICATIONS TO COMPONENTS THAT HAVE NOT BEEN APPROVED OR AUTHORIZED BY NORTHWEST FABWORKS INC (NWF) WILL VOID WARRANTY AND/OR RETURNS. NWF IS NOT RESPONSIBLE FOR DAMAGED COMPONENTS THAT ARE NOT INCLUDED IN THE PURCHASED PRODUCT. NWF IS NOT RESPONSIBLE FOR DAMAGED NWF PRODUCTS CAUSED BY THE FAILURE OF NON-NWF PARTS. NWF DOES NOT COVER DAMAGE CAUSED BY INCORRECT INSTALLATION AND/OR ASSEMBLY. NWF LIMITS LIABILITY TO PRODUCT REPLACEMENT AND IS NOT LIABLE FOR LABOR, STORAGE, LOST WAGES OR OTHER COSTS ASSOCIATED WITH DOWNTIME. NWF DOES NOT WARRANTY PRODUCTS THAT HAVE BEEN USED OUTSIDE OF THEIR INTENDED USE.INSTALLATION OF THE FOLLOWING PRODUCT MAY VOID AUTOMOTIVE MANUFACTURER WARRANTY.