the belly pan will protect the engine area from debris there is also a transmission guard that bolts on behind
the belly pan and protects the transmission area from sticks and rocks, used together not much will get threw
The "U" model belly pan is a must for dozer work.
Also that transmission case isn't as stout as we'd like to believe with plenty of them getting cracked/busted.
It is a two piece affair as shown in the picture, going back to attachment at the draw bar mounting bracket. Not much fun when you need access though. The tow hook is a nice addition.