PREVOST X3-45 2016 Maintenance Manual Download

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Section 07: TRANSMISSION

PA1593



To be sure a fluid is qualified for use in Allison

transmission, check for the

DEXRON-III®

license number on the container or consult the
lubricant manufacturer. Consult your Allison
Transmission dealer or distributor before using
other fluid types.

Customers may use TranSynd™/TES 295
equivalent and extend drain intervals. Equivalent
TranSynd™ fluid must meet or exceed TES 295
requirements. Customers may choose from a
wide variety of approved Dexron-III® fluids.

Customers may choose from a wide variety of
approved non-TES 295 like Dexron-III

approved Schedule 1 TES-389 fluids.

The Transmission Fluid Operating Temperature
Requirements table lists the minimum fluid
temperatures at which the transmission may be
safely operated without preheating. Preheat with
auxiliary heating equipment or by running the
equipment or vehicle with the transmission in «N»
(Neutral) for a minimum of 20 minutes before
attempting range operation.

Transmission Fluid Operating Temperature Requirements

Fluid type

Minimum operating temperature

Celsius Fahrenheit

TranSynd™ -30

-22

DEXRON-III

-25

-13

CAUTION

Disregarding minimum fluid temperature limits
can result in transmission malfunction or
reduced transmission life.

NOTE

The use of an arctic preheat kit is
recommended at temperatures below -25ºF (-
32ºC). If a preheat kit is not available, the TCM
will restrict full operation until the sump
temperature is increased.

3.6 OIL

CONTAMINATION

At each oil change, examine the drained oil for
evidence of dirt or water. A nominal amount of
condensation will emulsify during operation of the
transmission. However, if there is evidence of
water; check the cooler (heat exchanger) for other
signs of leakage. This, however, may also
indicate leakage from the engine oil system.

3.7 METAL

PARTICLES

Metal particles in the oil (except for minute
particles normally trapped in the oil filter) indicate
damage has occurred in the transmission. When
these particles are found in the sump, the
transmission must be disassembled and closely
inspected to find the source. Metal contamination
will require complete disassembly of the
transmission and cleaning of all internal and
external circuits, coolers, and all other areas
where the particles could lodge.

CAUTION

If excessive metal contamination has occurred,
replacement of the oil cooler and replacement
of all bearings within the transmission is
recommended.

3.8 COOLANT

LEAKAGE

If engine coolant leaks into the transmission oil
system, immediate action must be taken to
prevent malfunction and possible serious
damage. The transmission must be completely
disassembled, inspected, and cleaned. All traces
of the coolant contamination must be removed.
Friction clutch plates contaminated with ethylene
glycol must be replaced.

3.9

CONTROL SYSTEM PROGNOSTICS

The transmission control system includes the
provision for the user to monitor various
transmission operating parameters.
Transmission operating parameters monitored
by the prognostics feature are:

Oil Life Monitor

Filter Life Monitor

Transmission Health Monitor

NOTE

The prognostics package requires the use of
TranSynd™ or an Allison approved TES-295
licensed fluid

in the transmission and Allison High

Capacity filters. If any other fluids or filters are
used, Prognostic mode

must be disabled

Prognostic information will not be accurate with any
other fluids or filters and could result in missed
maintenance activities resulting in transmission
damage.

PREVOST X3-45 2016, Maintenance Manual

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