Marmon-Herrington MVG-1600
Note: Marmon-Herrington MVG-1600 transfer cases are available on 108SD and 114SD vehicles. Some 108SD vehicles are equipped with an alternate transfer case. For more information about other transfer cases, see "Meritor MTC Series" in this chapter or the manufacturer's documentation. For more information about Marmon-Herrington transfer cases, refer to
Vehicles equipped with a Marmon-Herrington MVG-1600 transfer case may be used in applications requiring up to full-time 4x4, 6x6, or 8x8 operation. The MVG-1600 transfer case has two gear sets: HIGH RANGE and LO RANGE.
Warning: Do not engage a Marmon-Herrington MVG-1600 transfer case when driving on normal highway conditions. Severe personal injury and/or damage to components can result when the transfer case is misused.
Engaging and Disengaging the Steer Axle
Dash-mounted switches control the transfer case functions; see Ignition Switch for more information.
Important: The wheels must not slip during engagement of the steer axle driveline.
To engage the steer axle driveline, stop the vehicle, place the transmission in neutral, and press the AWD switch. Then place the transmission in gear and proceed at a slow pace of less than 5 mph (8 km/h) until the AWD dash indicator illuminates. An audible engagement may be heard.
To disengage the steer axle, stop the vehicle, place the main transmission in neutral, and press the AWD switch. Continue at a slow pace of less than 5 mph (8 km/h) until the dash indicator light turns off. An audible disengagement may be heard. If the steer axle driveline does not disengage, the steer axle driveline coupling may be in a bind. Turn the steering wheel back and forth while driving, or briefly drive the vehicle in reverse.