Forgot to add that the V6 tcase (VF1A) has a different shifter base than the gear drivern case (RF1A), so you need the shifter to go with the case. You can also put in a twin stick, which separates the 2WD/4WD from the Hi/Low shift forks as well. On my truck, the transmission shift lever interfered with the twin sticks in a single case setup (requires bending the transmission lever), but works perfect with duals.