Trail-Creeper™ 4.70 Single Transfer Case 21-Spline Input, Forward Shift, 4" Offset

Trail Creeper™ 4.7 Single Transfer Cases

If you have a 4-cylinder 1979-1995 Toyota Pickup or a 4 cylinder 1985-1995 4Runner, as long as the truck didn't have Automatic Differential Disconnect (ADD), the stock transfer case in the vehicle was a gear-driven RF1A with a 2.28:1 low range gear ratio.  

It doesn't take long to realize that a 2.28:1 low range is too high for some terrain.  More than twice the torque at half the speed can be achieved with 4.7:1 gear set in your transfer case.

While you could remove your T-case, drag it to the workbench and replace the 2.28 gears with 4.7 gears yourself,  spend more time on the trail by simply replacing your stock RF1A with our fully-built Trail-Creeper™ 4.7 Transfer Case.

Additionally, as shown in the Transmission Matrix below, our Trail-Creeper™ 4.7 Single Transfer Case can replace the VF1A chain-drive transfer case in a V6 Pickup or 4Runner when installed with the V6 Adapter Kit (SKU: 100086-1-KIT).

We manufacture 12 different variations of this transfer case.  Choosing the right variation for your application requires defining the following three options:

Input Gear:  [21-Spline or 23-Spline]

Shifter Options:  [Top Shift,  Forward Shift 4" Offset or Forward Shift 4.5" Offset] - Top shift T-cases have the shifter(s) on top of the transfer case. Forward Shift T-cases have protruding shift forks that attach to shifter(s) mounted on the transmission.

Single or Twin Stick:  [Single Stick Only or Twin Stick Ready (Loose Interlock Pin)] - A twin-stick allows independent control of low/high range and 2WD/4WD engagement.  With a twin-stick configuration you can switch between 2WD and 4WD without stopping and access 2WD Low-Range for better handling when traveling between obstacles on a trail.

The transmission matrix below will assist you in determining which input gear and shifter options are compatible with your transmission.  It is up to you whether you opt for a single or twin-stick configuration to control your transfer case (as long as you don't have a W56-C, D or E transmission that REQUIRES Single Stick).

If your adventures lead you to places where even a 4.7:1 transfer case gear ratio is insufficient, you can combine this case with our Trail Creeper  2.28 Crawl Box to create a dual transfer case.

Please NOTE:

• Our Trail-Safe™ T-case Output Seal will be included and installed at no additional cost.
• If you are unsure if you have the 4" or 4.5" Forward Shift transfer case, please refer to the comparison image at the top of the page.
  
• While these transfer cases ship with a new shifter base, neither the [Single Stick Only] cases nor the [Twin Stick Ready] cases ship with shifters.  Shifters must be purchased separately if needed (see "Related Products" below).

Specifications

• Features a 4.70 low range gear set
• Each case is fully rebuilt and inspected
• Triple drilled flanges are installed on both front and rear output
• Available with 21 or 23 spline input gear
• Choice of Top Shift, Forward Shift 4-Inch Offset or Forward Shift 4.5-Inch Offset
• Choice of Single or Twin-Stick-Ready (Loose Interlock Pin) Configurations
• Can be installed as a replacement to your stock gear driven transfer case or combined with a crawl box to create a dual transfer case
• Includes our new Trail-Safe™ T-Case Output Seal

Application Data

NOTE: These transfer cases are shipped with our Triple-Drilled T-case flanges. They can accommodate the following driveline bolt patterns:

• 70mm x 61.5mm x 10mm bolt
• 68.3mm x 60mm x 10mm bolt
• 60mm x 60mm x 10mm bolt

If you have a driveline that uses a different pattern, you will need to change your driveline or use a different driveline flange. We offer blank driveline flanges (302906-1-KIT) that can be drilled to accommodate most patterns (sold separately).