TM-9-2320-338-10

TRUCK, CARGO, 8X8, M977A4

TECHNICAL MANUAL; OPERATOR'S MANUAL

OCTOBER 2008

TM-9-2320-338-10 - Page 351 of 1120

NOTE

•

Use up or down arrow buttons to adjust gear settings as

required.

•

Once the arrow buttons are used, the transmission will not

upshift past the gear range displayed in the transmission range

selector digital display, but will downshift normally.

•

Press the D (drive) button to return transmission to normal

function (using all gears).

(1) 4 (fourth), 3 (third), or 2 (second) gear range to:

(a) Drive vehicle in off-road conditions. (WP 0053)

(b) Drive vehicle in city traffic and on highway. (WP 0052)

(c) Haul a heavy load.

(d) Drive down moderate grades.

(e) Drive in other conditions as needed.

(2) 1 (first gear range) when:

(a) Maximum pulling power is required.

(b) Drive vehicle up/down steep grade. (WP 0054)

(c) Drive vehicle in slippery conditions. (WP 0055)

OPERATE TRANSFER CASE

1.

Start engine. (WP 0044)

Allison

TRAILER

AIR SUPPLY

M

M

1

3

2

4

Figure 2.

TM 9-2320-338-10

0048

0048-3