Section 07: TRANSMISSION
PA1593
6
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® or
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:
o Oil Life Monitor
o Filter Life Monitor
o 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.
Refer to TES 295 Approved Fluids list, found under
the Service/Fluids heading on the home page of
the Allison Transmission web site.
www.allisontransmission.com
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