August 18, 2004Trying to find out this information. Should you be able to spin the rear wheels of your truck using the front driveshaft while the truck is 2wheel drive. Automatic trans in neutral with engine off. The dealer tells me that the front and rear shafts should turn together when you use the shift on the fly button they say it only locks the front wheels and the tansfer case is always ingaged. Could this be the cause of poor fuel milage.