Hot Check
- Park the vehicle on a level surface. Apply the parking brakes and chock the rear tires.
- Shift the transmission to NEUTRAL.
- 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).
- With the engine idling, remove the dipstick from the tube and wipe it clean.
- Insert the dipstick in the tube, then remove it.
- Check the fluid level reading and repeat the check procedure
to verify the reading. Safe operating level is within the HOT RUN
band on the dipstick. The HOT RUN band is between the HOT FULL and
HOT ADD marks.
If the fluid level is not within the HOT RUN band, add or drain fluid as needed to bring the fluid level within the HOT RUN band. See Fig.. For approved Allison transmission lubricants, see Table..
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Cold Run Band
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Hot Run Band
Fig. 1, Dipstick Markings
Table 1, Approved Allison Transmission Lubricants
Approved Allison Transmission Lubricants
Lubricant Type1
Temperature: °F (°C)
All Allison Transmissions
Castrol TranSynd™ (synthetic)
Above –22 (–30)
Dexron® III
Above –13 (–25)
- Lubricants listed in order of preference. Do not mix types of oil.
Table 1, Approved Allison Transmission Lubricants
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