2008 Dodge Ram 2500 Pickup Owner Manual - Page 309

STARTING AND OPERATING 307 This Electronically Shifted transfer case provides four mode positions: 2 (rear)-wheel drive high range, 4-wheel drive lock range, 4-wheel drive low range, and NEUTRAL. The Electronically Shifted transfer case is designed to be driven in the 2-wheel drive position (2WD) for normal street and highway conditions (dry, hard surfaced roads). When additional traction is required, the transfer case 4WD LOCK and 4WD LOW positions can be used to lock the front and rear driveshafts together and force the front and rear wheels to rotate at the same speed. This is accomplished by rotating the 4WD Control Switch to the desired position - see Shifting Procedure section for specific shifting instructions. The 4WD LOCK and 4WD LOW positions are designed for loose, slippery road surfaces only. Driving in the 4WD LOCK and 4WD LOW positions on dry hard surfaced roads may cause increased tire wear and damage to the driveline components. 5 NOTE: The transfer case NEUTRAL position is selected by depressing the recessed button located on the lower left hand corner of the 4WD Control Switch. The transfer case NEUTRAL position is to be used for recreational towing only. Refer to "Recreational Towing" in this section.