ALLISON-OM1334EN

DRIVING ON ICE OR SNOW

The ALLISON AUTOMATIC continuously provides proper balance between required

power and good traction. The driver can have better control of his vehicle because of

this smooth, constant flow of power through the drivetrain. When driving on ice or

snow, any acceleration or deceleration should be made gradually.

ROCKING OUT

If the vehicle is stuck in deep sand, snow, or mud, it may be possible to “rock” it out.

Shift to

(Drive) and apply steady, light throttle (never full throttle). When the

vehicle has rocked forward as far as it will go, apply and hold the vehicle service

brakes. Allow the engine to return to idle; then select

(Reverse). Apply a steady,

light throttle and allow the vehicle to rock in

(Reverse) as far as it will go. Again

apply and hold the service brakes and allow the engine to return to idle. This

procedure may be repeated in

(Drive) and

(Reverse) if each directional shift

continues to move the vehicle a greater distance. Never make neutral-to-range or

directional shift changes when the engine rpm is above idle.

TEMPERATURES

The transmission fluid temperature is indicated in some vehicles by a gauge which

usually indicates oil temperature to the cooler (converter out). In some vehicles the

only temperature indication is the engine coolant temperature indicator.

Some important transmission temperatures are shown in the following table.

WARNING:

Do not use the retarder during inclement weather or

when road surfaces are slippery. De-energize the retarder at the

master control switch.

CAUTION:

DO NOT make neutral-to-range or directional shift

changes when engine rpm is above idle. Failure to return to idle will

subject the transmission to excessive shock loads which could cause

clutch and/or shaft damage. Also, do not allow the transmission to

overheat while rocking out.

Sump Fluid, Minimum Continuous

100°F (40°C)

Sump Fluid, Typical Continuous

200°F (93°C)

Converter Out Fluid, Maximum

300°F (149°C)

Retarder Out Fluid, Maximum

330°F (165°C)

Sump Fluid, Maximum

250°F (121°C)

ALLISON AT, MT, HT SERIES ON-HIGHWAY TRANSMISSIONS

OPERATOR'S MANUAL

2000