Those driving the M35 military truck either for fun, war, or work may have 'noticed' that in the summer, the inside of the cab is like an oven. This is due (besides the fact that the truck has no air coinditioning..) to hot engine compartment air entering the cab through various holes large and small. The worst offender by far is the transfer case shift lever hole. It's at the rear of the transmission tunnel and the hot air blows up through there like a heater. The hole is about 1.5" wide and 6.5" long and is mostly unobstructed. The lever occupies only a 1x1" space in that slot. The second worst offender is the transmission shifter hole. It's not as bad, but it's bad enough. This hole also admits any oily dirt and dust from the engine area. Not that we care about getting dirty. The whole thing looks alot better afterward, and the cab floor will stay alot cleaner. The boot used is the Mr Gasket "Super Boot" #9649.