Meritor MTC Series
Some vehicles are equipped with a Meritor MTC Series transfer case for part-time 4x4, 6x6, or 8x8 operation. Meritor MTC Series transfer cases have two gear sets: HIGH RANGE and LO RANGE.
Warning: Do not engage a Meritor MTC Series transfer case when driving on normal highway conditions. Severe personal injury and/or damage to components can result when the transfer case is misused.
Important: Steer axle engagement is limited to 20% or less of annual vehicle mileage.
Follow the operating guidelines in Table. when driving a vehicle equipped with a Meritor MTC transfer case.
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, drive the vehicle at a constant speed below 10 mph (16 km/h) and press the AWD switch. An audible engagement may be heard.
To disengage the steer axle, drive the vehicle at a constant speed below 10 mph (16 km/h) and press the AWD switch. 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.
Table 1, Operating Guidelines, Meritor MTC Transfer Cases
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Disengaged Steer Axle |
Engaged Steer Axle |
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Range |
Traction Conditions |
Applicable Vehicle Speeds |
Traction Conditions |
Applicable Vehicle Speeds |
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HIGH RANGE |
Most normal driving conditions (such as dry or wet pavement or mixed road surfaces) when moderate to high vehicle speeds are appropriate. |
0 mph (0 km/h) to maximum vehicle speed |
When more traction is needed at moderate to low vehicle speeds on dirt or gravel surface with shallow to moderate grades (8% maximum), icy or snow-covered roads, or hard-packed sand. |
20 mph (32 km/h) or less |
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LO RANGE |
Not applicable. Do not use LO RANGE unless the steer axle is engaged. |
When maximum power and maximum traction is needed on steeper grades (15% maximum), deeply rutted tracks, deep mud or snow, extremely rocky surfaces, or soft, loamy sand. |
15 mph (24 km/h) or less |
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IMPORTANT: Engaging the steer axle will increase the turning radius of the vehicle. |
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