If your vehicle has a controlled traction or locking differential axle, the switch is located in the center of the instrument panel. You'll see this control on single rear axle vehicles.

If you're approaching a slippery surface where it looks like one or even both wheels may start to slip, you can press the bottom of this switch. It locks your rear differential so that power is transmitted equally to both rear wheels.

Let up on the accelerator before you turn on your rear axle differential lock.

Notice: Turning on the inter-axle differential lock while the rear wheels are spinning freely, as they might on snow or ice, can damage the axle(s). Turn on this control only while the wheels are not spinning freely.