Section 07: TRANSMISSION
PA1553
6
o Waiting time, vehicle must be stationary
for at least 2 minutes to allow the oil to
settle;
o Engine at idle;
o Oil at normal operating temperature,
between 140°F (60°C) and 220°F (104°C);
o Transmission in «N» (Neutral);
o Transmission output shaft stopped;
o Oil level sensor present and working.
After 2 minutes, the display will flash one of the
codes shown hereafter:
CODE CAUSE OF CODE
O L…O K Oil level is correct
O L…L O…01 One quart low
O L…L O…02 Two quarts low
O L…H I…01 One quart high
O L…H I…02 Two quarts high
NOTE
Failure to meet one of the above parameters
will stop the two minute countdown. One of
the codes shown hereafter will indicate the
cause of the countdown interruption. Once all
parameters are met, the countdown will
continue from where it left off.
CODE CAUSE OF CODE
OL…0X Waiting time too short
OL…50 Engine speed (rpm) too low
OL…59 Engine speed (rpm) too high
OL…65 Neutral must be selected
OL…70
Sump oil temperature too
low
OL…79
Sump oil temperature too
high
OL…89 Output shaft rotation
OL…95 Sensor failure
To exit the Oil Level Display Mode, press any
range button: «R», «N» or «D».
3.5 IMPORTANCE OF PROPER FLUID LEVEL
It is important that the proper fluid level be maintained at all times because the transmission fluid cools,
lubricates, and transmits hydraulic power. If the fluid level is too low, the converter and clutches do not
receive an adequate supply of fluid. If fluid level is too high, the fluid can aerate, causing the transmission
to shift erratically or overheat.
3.6 KEEPING OIL CLEAN
Oil must be handled in clean containers, fillers, etc., to prevent foreign material from entering the
transmission. Place the dipstick on a clean surface area while filling the transmission.
CAUTION
Containers or fillers that have been used to handle antifreeze or engine coolant must NEVER be used for
handling transmission fluid. Antifreeze and coolant solutions contain ethylene glycol that, if introduced into
the transmission, can cause the clutch plates to fail.
3.7 RECOMMENDED AUTOMATIC TRANSMISSION FLUID
Hydraulic fluids used in the transmission are important influences on transmission performance, reliability
and durability. Castrol TranSynd™ Synthetic Fluid and DEXRON-III® fluids are recommended for on-
highway applications.
• TranSynd™ is a full synthetic transmission fluid developed by Allison Transmission and Castrol Ltd. This
fluid meets Allison specifications for Severe Duty and Extended Drain Intervals. TranSynd™ is fully
qualified to the Allison TES295 specifications and is available through Allison distributors and
dealerships.
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