ALLISON-OM1334EN

THROTTLE CONTROL

The position of the throttle influences the automatic shifting. At wide open throttle, the

transmission will upshift automatically near the governed speed of the engine. At part

throttle, shifts will occur at a lower engine speed. When modulated lockup is

provided, closed-throttle operation delays the release of the lockup clutch to provide

additional engine braking at lower vehicle speeds.

DOWNSHIFT INHIBIT FEATURE

The transmission hydraulic system will inhibit a shift into any range at a speed that

will cause engine overspeed. Any lower, forward range may be selected at any time,

but the actual engagement will not occur until road speed is reduced; downshifting is

progressive as road speed decreases. The inhibit effect will cause downshifts to occur

at slightly higher speeds than normal automatic downshifts.

OPERATING IN COLD WEATHER

Refer to Table 2 on Page 31 for the minimum fluid temperatures at which the

transmission may be safely operated in a forward or reverse range. When ambient

temperature is below the minimum fluid temperature limit and the transmission is

cold, preheat is required. If auxiliary heating equipment is not available, run the

equipment or vehicle with the transmission in neutral for a minimum of 20 minutes

before attempting range operation.

CAUTION:

Never shift from

(Neutral) to

(Drive) or

(Neutral) to

(Reverse) at engine speeds above idle. The vehicle

will lurch forward or rearward and the transmission can be damaged.

CAUTION:

Disregarding minimum fluid temperature limits can

result in transmission malfunction or reduced transmission life.

DRIVING TIPS

ALLISON-OM1334EN - Page 22 of 48