Transmission?? Help!

This is Kevin with NWA Auto Shop. Without seeing the vehicle, I can only theorize. Based on the limited information given, these are my thoughts. A) The brake pads have a lining that allows them to dissipate heat. When this lining is worn off you are left with the metal backing plate contacting the metal rotor. When this happens they can fuse together. When this happens it literally locks up the wheel so it can't spin. With enough force (giving it gas) it can break free and the vehicle will start to move again. You need to get the rear brakes serviced before driving it more as this is very unsafe. In regards to driving in 4 Wheel Drive (Lo or High) this should only be done on loose (gravel, dirt, mud, etc) ground conditions, never on dry pavement. AWD drive and 2Hi are fine on dry pavement. As for noises they are usually not supposed to be excessively loud. There is a procedure for changing the different drive axle configurations and the owners manual will indicate which noises are normal. Kevin