This thing is all kinds of cool man, bravo!!!
Will we see anymore zombie vehicles from you? Please say yes!
"Sir, we're out of ammo!"
"Oh crap...hey wait a minute! We're in a tank, run 'em over!!!!"
*splat, splat, squish*
That gives me an idea for a mod you could do though providing your zombies would act this way. After running over a whole mess of them the time would come to egress the tank at which time any zombies or pieces there of still attached/stuck in various locations might pose a very real threat to the crew. You wouldn't want to mow down a hole horde only to get bitten on the arm as you pop the hatch because half of one is stuck on the turret. How about some sort of remote cameras or periscopes with wide angle lenses to allow for a visual inspection of the exterior?
Just had another idea, a zombie cleaning depot adapted from a self service car wash! Drive the tank into the stall and a squad "cleans" the exterior of the undead with weapons of their choice and then hoses off the pieces that in turn get pushed into pits for later burning.
I might be over-thinking all of this