2004 Nissan Frontier Owner's Manual - Page 167

OFF: For driving up and down long slopes where engine braking is necessary push the switch OFF . The indicator light in the instrument panel comes on at this time. When cruising at a low speed or climbing a gentle slope, you may feel uncomfortable shift shocks as the transmission repeatedly shifts between 3rd and overdrive. In this case, set the overdrive switch in the OFF position. WSD0070 WSD0069 Overdrive switch (KA24DE engine type a) ON: For typical driving, push the overdrive switch ON with the selector lever in the D (Drive) position. The transmission is upshifted into OVERDRIVE as the vehicle speed increases. When driving conditions change, reset the overdrive switch in the ON position to turn the overdrive on. The indicator light goes out at this time. Remember not to drive at high speeds for extended periods of time with the overdrive switch set in the OFF position. This reduces fuel economy. Overdrive switch (KA24DE engine type b) Each time your vehicle is started, the transmission is automatically "reset" to overdrive ON. ON: For normal driving the overdrive switch is engaged. The transmission is upshifted into overdrive as the vehicle speed increases. Overdrive does not engage until the engine has reached operating temperature. The overdrive does not engage until the engine has reached operating temperature. Starting and driving 5-15