Hi 1sgt,

From what I understand, that Tamiya kit gearbox ( have one too... with those gold looking gears and gray casing?) is noisy and weak. I think Rex Ross mentioned that as well on the 1st page of this thread. I would definitely go with that 21st Century PzIV gearbox. That thing has been rock solid for me so far. I haven't driven mine too much, but so far, it's really strong and I don't notice any slipping of the gears. If you're building it to battle, go with the 21st gb. If you just drive it around here and there, the Tamiya one would probably be ok.

Dave