The New Venture Gear Model NV243 is an electronically controlled optional transfer case for use on four-wheel drive K trucks. The driver selects 2HI, 4HI, or 4LO by pushing one of three illuminating transfer case select switch buttons mounted on the instrument panel. The select switch buttons display the following information:

During normal driving the transfer case is in the 2HI mode. When the transfer case is in 2HI both the 4HI and 4LO switch circuits are open, and both lights are OFF. When the four-wheel drive select switch button has been pressed, the four-wheel drive indicator lamp under the select switch button turns ON when the front axle has engaged. The shift select button will blink while the front axle is engaging. This is a normal condition.

The shifting of the transfer case is performed by a motor/encoder that receives drive signals from the transfer case shift control module. When the driver selects one of the transfer case select switch buttons, request signals are sent to the transfer case shift control module. If the correct input signals exists, the transfer case shift control module will send drive voltages to the motor/encoder. The motor/encoder will position the transfer case to the ordered shift position.