The crossmember, which supports the transmission and transfer case, drops low to clear the front driveshaft. By moving the transfer case rearward using the Klune-V, the front driveshaft angle would be lessened for better service life. However, moving it back also meant it would interfere with the crossmember, which would have to be modified. The front adapter ring is sealed to the unit on both sides to eliminate leakage. Older Extreme-Duty models had all-thread holding the case together and acting as mounting bolts, while the new versions easily bolt into place.