2008 Dodge Ram 2500 Pickup Owner Manual - Page 314

312 STARTING AND OPERATING ignition key must be in the ON position with the engine either running or off. This shift cannot be completed if the key is in the ACC position. NOTE: The 4x4 system will not allow shifts between 2WD/4WD LOCK if the front and/or rear wheels are spinning (no traction). In this situation the selected position indicator light will flash and the original position indicator light will remain ON. At this time, reduce speed and stop spinning the wheels to complete the shift. 2WD or 4WD LOCK⇔ 4WD LOW NOTE: When shifting into or out of 4WD LOW some gear noise may be heard. This noise is normal and is not detrimental to the vehicle or occupants. Shifting can be performed with the vehicle rolling 2 to 3 mph (3 to 5 km/h) or completely stopped. USE EITHER OF THE FOLLOWING PROCEDURES: Preferred Procedure 1. With engine running, slow vehicle to 2 to 3 mph (3 to 5 km/h). 2. Shift the transmission into NEUTRAL (depress clutch on manual transmissions). 3. While still rolling, rotate the transfer case control switch to the desired position. 4. After the desired position indicator light is ON (not flashing), shift transmission back into gear (release clutch on manual transmissions).