Section 07: TRANSMISSION
PA1553
5
FIGURE 4: COLD CHECK 07050
7. Remove the dipstick and observe the fluid
level. Repeat the check procedure to verify the
reading. If the fluid on the dipstick is within the
COLD CHECK band, the level is satisfactory
for operating the transmission until the oil is
hot enough to perform a Hot Check. If the
fluid level is not within this band, add or drain
fluid as necessary to bring the level within the
COLD CHECK band.
8. Perform a Hot Check at the first opportunity
after the normal operating temperature of
160ºF (71ºC) to 200ºF (93ºC) is attained.
CAUTION
DO NOT operate the transmission for extended
periods of time until a Hot Check has verified
proper fluid level. Transmission damage can
result from extended operation at improper fluid
level conditions.
CAUTION
Obtain an accurate fluid level by imposing the
following conditions:
• Engine is idling (500-800 rpm) in «N»
(Neutral).
• Transmission fluid is at normal operating
temperature.
• The vehicle is on a level surface.
3.3 HOT CHECK
CAUTION
The oil must be hot to ensure an accurate
check for this procedure. The oil level rises as
temperature increases.
To perform a Hot Check, do the following:
1. The Hot Check can be performed when the
transmission oil reaches the normal
operating temperature (160ºF to 200ºF /
71ºC to 93ºC). The transmission oil
temperature can be checked with the
dashboard message center display (MCD)
when selecting the Gauge Mode (refer to the
‘’Operator’s Manual’’ for added information).
2. Park the vehicle on a level surface and shift to
Neutral (N). Apply the parking brake and allow
the engine to idle (500 - 800 rpm).
3. Remove the dipstick from the tube and wipe it
clean. Insert the dipstick into the fill tube,
pushing down until it stops.
4. Remove the dipstick and observe the fluid
level. The safe operating level is anywhere
within the HOT RUN band on the dipstick.
Repeat the check procedure to verify the
reading.
5. If the level is not within this band, add or drain
fluid as necessary to bring the level within the
HOT RUN band. (Fig. 5).
FIGURE 5: HOT CHECK 07049
6. Be sure fluid level checks are consistent.
Check level more than once and if readings
are not consistent, check to be sure the
transmission breather is clean and not
clogged. If readings are still not consistent,
contact your nearest Allison dealer or
distributor.
NOTE
The Cold Check is more appropriate for
verifying the oil level after the first fill-up. In case
of conflict, the Hot Check has priority over the
Cold Check; the fluid level check using the
pushbutton shift selector has priority over
the Hot Check.
3.4 FLUID LEVEL CHECK USING THE
PUSHBUTTON SHIFT SELECTOR
Oil level codes are obtained as follows:
1. Park vehicle on a level surface, select «N»
(neutral) on the pushbutton shift selector
and apply parking brake.
2. Press simultaneously the
(Up) and
(Down) arrow buttons once.
3. Oil level codes are displayed in 2 minutes
(e.g. display will flash and 8, 7, 6, 5, ...;
countdown will occur during the 2 minutes)
once the following parameters are met:
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