Transfer Case problems of the 2010 Ford F-250

Traveling on I-15 freeway in southern California, going 70 mph on cruise. Head a loud "bang", pulled over and saw damage to underside of vehicle and fluids leaking. Transfer case appeared to be split open. Towed to mojave Ford dealership in barstow California, where repairs were made. Description of findings is attached below. Problem seems to have originated in the 4wd system. Truck was in 2wd in the cab, however vacuum hubs were in 4wd. Mechanic stated that this is a problem with Ford trucks. No recall on file. Post repair, the truck still stays in 4wd when reverting to 2wd from the cab. Operator is required to manually put hubs into 2wd.