rangerstein

No grinding going on. Did not hear anthing go wrong. Was working fine, parked it and came back out later and only middle tires were spinning. I don't think it is full time engagement unless something fell off inside while sitting for 40 minutes. I believe if that happened something would be making noise while I spin back tires. Somebody that has a 6x6 please help

I was told by a mechanic that the rear tires engage by a magnet engagement, but I don't see any wires running to the back like the front.

The middle two tires on 6x6 are spinning. the drive shaft from middle to rear is spinning and the shaft from middle to front is spinning. I have the entire thing jacked up. When I first start it both middle tires will spin and the front two will spin for about 10 seconds. the rear tires do nothing. I can spin the rears wheels both forward or backwards at same time or one forward and one backward and vise versa. Is this normal. Do I have a rear differential broke or is something not engaging the shaft to the gears in the back. Would somebody please tell me how all the drive system works together so I can find something to fix of replace.