There are two main versions of the R150F, and the tail housings are different between the two.
- The 1988-1995 version that was found on V6 Pickups / 4Runners:
![](https://i.imgur.com/aRJ912B.jpg)
- The 1996-2004 version that was found on V6 Tacomas / 4Runners:
![](https://i.imgur.com/gmBxMKM.jpg)
In order to attach a gear-driven transfer case on either version you need an adapter. The 1988-1995 R150F needs this:
3.0L-V6 Adapter and the 1996-2004 R150F needs this:
3.4L-V6 Adapter.