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Transfer Case Data (218) | Up
TM-9-2320-280-10 M977 Series 8 x 8 Heavy Expanded Mobility Tactical Trucks (HEMTT) Manual | Next
Maximum Vehicle Operating Speeds (3L80 Transmission) |
TM 9-2320-280-10
Table 1-10. Transfer Case Data (242)
General Information
Model ............................................................................................................
New Process Gear 242 (MOD)
Type ...........................................................................................................
Two-speed, locking, chain driven
Oil type.........................................................................................................................................
Dexron® II
CAUTION
Damage to drivetrain will occur if transfer case ranges are not selected properly. Refer to paragraph 2-
11 for specific instructions on Placing Vehicle in Motion, and paragraph 2-29, Operating on Unusual
Terrain.
Transfer Case Range Selection
Recommended Shift Lever Position
Operating Condition
"H" (high range)
This drive range shall be selected whenever possible.
High range should be used when operating on all
primary, secondary, and off-road surfaces, where little
or no wheel slippage exists. This range is also to be
used when encountering sharp, continuous turns on
high traction surfaces.
"H/L" (high lock range)
This drive range shall be selected for off- highway hilly
terrain or when continuous wheel slippage is evident;
i.e., when operating in mud, snow, loose sand, or on
ice, and increased control or additional traction is
required.
"L" (low range)
This drive range shall be selected only when high
ranges do not provide sufficient power to negotiate
steep hills or downgrades. This range shall also be
used when the vehicle is mired and cannot be
extracted using the high lock range.
"N" (neutral)
Vehicle is disabled and must be towed.
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