The Tiger made the 10-15 feet in 4 inches of snow before grinding to a halt... the T-34 started making this clicking noise then a free wheeling..that's when the gear on the left side quit turning..since I have glued the gear to the shaft, this is no longer a problem.

might need to buy new gears sometime in the months to come just to make sure this is not a problem that pops up from time to time.