The rear axle shift control switch for an automatic transmission is located in the instrument panel switchbank.
To use the rear axle shift control, press the bottom of the switch to get to the high range. The switch indicator light will come on when the vehicle is in the high range. Press the top of the switch to return to the low range.
The two-speed axle should be in low range when you park the vehicle. You will need to engage the transmission and move the vehicle a little to assure the axle is in range. Then shift into PARK (P), apply the parking brake, and shut off the engine.
To shift up from low to high range while driving, press the bottom of the rear axle shift control switch as you are releasing the accelerator pedal. After the shift has occurred, apply the accelerator as desired.
To shift from high to low range while driving, press the top of the rear axle shift control switch as you release the accelerator pedal. Press the accelerator pedal slowly until the down shift has occurred, then apply the accelerator as desired.
For better performance during off-road or under a heavy load, shift the axle into low range and then operate the transmission normally.
For better performance on the highway, shift the axle to high range and operate the transmission normally.