I have several questions too that Im wondering about ! does it heat up with and with out front axle engaged? does it stop overheating with rear driveshaft swapped straight thru? I wonder if with rear driveshaft swap and lockout hubs would end the over heating cause you stop the front axle from turning and rear is straight thru, unless like some transfer cases the input isnt straight thru to rear output. it has to be something overlooked or miss designed?