TM-9-2320-273-10
TRUCK, TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER
TECHNICAL MANUAL; OPERATOR’S MANUAL
DECEMBER 2012
TM-9-2320-273-10 - Page 189 of 452
EFFICIENT AND ECONOMICAL DRIVING TECHNIQUES (M915A1) - CONTINUED
2. When starting from a stop on uphill grades pulling normal loads, use gear range
1-5 (Figure 14, Item 1) and accelerate at full throttle. Allow transmission to
upshift automatically until desired road speed is attained. If there is sufficient
power to maintain the desired road speed, remain in gear range 1-5
(Figure 14, Item 1). Manually downshift transmission to gear range 1-4
(Figure 14, Item 2) or lower if the desired road speed cannot be attained.
3. When operating at desired road speed and an uphill grade causes a steady
decrease in road speed, manually downshift to the next lower gear range once
engine speed reaches 1,700 rpm. Continue to downshift in this manner to match
the power demands of the grade. Once at top of hill, return to gear range 1-5
(Figure 14, Item 1).
Figure 14. Transmission Range Indicator.
1
2
3
4
TM 9-2320-273-10
0010
0010-23
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