A fully functional 4WD has been on my list for a while. After I had build the 9398 Technic set that I got as a gift I decided to use it as a base for the new Hummer I had planned for. I took the whole thing apart and rebuilded the chassis lowering it a bit and replacing the battery box. Also the fixture points for the suspension was changed. With the chassis modded for suitability and color trimmed, a completely new body was installed. The car is slightly less detailled as I would do normally to save some weight, but still on a fair level.
The car is fully functional and still has very good terrain capabilities. The point of gravity is a bit higher so it rolls a bit quicker then the original thing. Being a bit heavier, it still does perform very well.
I had questions about this Hummer and the Technic challenge now going on. It was never intended for that.