Toyota Tacoma Dual Transfer Case - Case Closed

This is how the factory transfer case looked in the stock position. Note that the transmission crossmember had been notched for front driveshaft clearance with the solid front axle on this particular vehicle. Other than the crossmember, your transfer case should look very similar to this once you remove the driveshafts.

With the stock transfer case removed, you can clearly see the transmission tailhousing where we will bolt up the new Inchworm adapter. We used a vehicle lift to aid installation and ease of photography, but the installation could easily be performed at home.

You can also clearly see the 23-spline couple that mates to the transmission used in V-6 Tacomas. Earlier geardriven Toyota transfer cases feature a passenger-side drop and different bolt pattern, making them incompatible with Tacomas.

Inchworm's new billet Tacoma transmission adapter bolts to the back of the stock R150F transmission to make it "look" like an earlier Toyota transmission and accept a geardriven transfer case.

As with the transfer case...

...a new billet Inchworm adapter bolts to the Toyota transfer case to make it "look" like an earlier geardriven case.

The venerable RF1A geardriven transfer case was installed between the two new adapters with the addition of the original Inchworm billet dual transfer case adapter.

This approach allows proven Toyota parts to be used, as well as an abundance of gearing options from stock 2.28:1 gears to lower 4, 4.7, or 5:1 gears.

The assembled unit adds 8-1/2 inches of drivetrain length, requiring driveshaft modifications and a new transmission crossmember.