1.
Park the vehicle on a level surface, apply the
parking brakes, and chock the tires.
2.
Clean the area around the fill plug, then remove
the plug from the side of the gear case.
3.
Using your finger or a bent pipe cleaner, check if
the fluid is level with the fill opening. See
4.
If the fluid level is low, check the transmission for
leaks, and correct as needed.
5.
If needed, add recommended fluid until it is level
with the lower edge of the fill opening. See
for approved transmission fluids.
6.
Clean the fill plug, then install it. Tighten the plug
as follows:
•
25 to 35 lbf·ft (34 to 48 N·m) for transmis-
sions with 3/4-inch pipe threads.
•
60 to 75 lbf·ft (81 to 102 N·m) for transmis-
sions with 1-1/4-inch pipe threads.
Allison
Cold Check
Clean all dirt from around the end of the fluid fill tube
before removing the dipstick. Do not allow foreign
matter to enter the transmission. Dirt or foreign mat-
ter in the hydraulic system may cause undue wear of
transmission parts, make valves stick, and clog pas-
sages.
It is important to check the fluid level cold to deter-
mine if the transmission has a sufficient amount of
fluid to be safely operated until a hot check can be
performed.
1.
Park the vehicle on a level surface, apply the
parking brakes, and chock the tires.
2.
Run the engine for at least one minute.
3.
Shift from DRIVE to NEUTRAL, and then shift to
REVERSE to fill the hydraulic system.
4.
Shift to NEUTRAL and allow the engine to idle at
500 to 800 rpm.
5.
With the engine running at idle, remove the dip-
stick from the tube and wipe it clean.
6.
Insert the dipstick into the tube, then remove it.
7.
Check the fluid level reading, then repeat the
check procedure to verify the reading.
If the fluid level is within the COLD RUN band,
the transmission may be operated until the fluid
is hot enough to perform a hot check.
If the fluid level is not within the COLD RUN
band, add or drain fluid as needed to adjust the
fluid level to the middle of the COLD RUN band.
See
NOTICE
As the fluid temperature increases, so does the
fluid level. Do not fill above the COLD RUN band if
the transmission fluid is below normal operating
temperature.
NOTE: Perform a hot check at the first opportu-
nity after the normal operating temperature, 160
to 200°F (71 to 93°C), has been reached.
Hot Check
1.
Park the vehicle on a level surface, apply the
parking brakes, and chock the tires.
2.
Shift the transmission to NEUTRAL.
3.
Operate the engine at idle (500 to 800 rpm) until
normal operating temperature is reached. Check
that the sump temperature is 160 to 200°F (71 to
93°C). Check that the converter-out temperature
is 180 to 220°F (82 to 104°C).
4.
With the engine idling, remove the dipstick from
the tube and wipe it clean.
5.
Insert the dipstick into the tube, then remove it.
6.
Check the fluid level reading, then repeat the
check procedure to verify the reading. Safe oper-
ating level is within the HOT RUN band on the
12/01/97
A
B
f270002a
A. Cold Run Band
B. Hot Run Band
Fig. 2, Dipstick Markings
Transmission
26
122SD and Coronado 132 Maintenance Manual, February 2016
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