2004 Lexus GX 470 Owners Manual - Page 427

STARTING AND DRIVING (b) Shifting procedure To shift between unlock and lock modes in "H", push the center differential lock button. To shift between unlock and lock modes in "L", push the center differential lock button. To shift between "H" and "L", stop the vehicle, put the transmission into "N" and move the four-wheel drive control lever. CAUTION Never move the four-wheel drive control lever if wheels are slipping. Stop the slipping or spinning before shifting. NOTICE For normal driving on dry and hard surface roads, unlock the center differential. To prevent damage to the center differential lock system, do not push the center differential lock button when the vehicle is cornering or when its wheels are spinning freely off the ground. If the indicator light does not go off when unlocking the center differential, drive straight ahead while accelerating or decelerating, or drive in reverse. 404