Silverado 1500 4WD V8-5.3L VIN B HO (2006)
Fluid - A/T: Testing and Inspection
Allison Transmission Fluid Checking Procedure
Transmission Fluid Checking Procedure
Cold Fluid Check
The purpose of the cold check is to determine if the transmission has enough fluid to be operated safely until a hot check can be made.
1. Bring the vehicle to a complete stop on a level surface using the service brakes.
Important: The fluid level rises as fluid temperature increases. DO NOT fill above the COLD CHECK band if the transmission fluid is below
normal operating temperatures.
2. Ensure that the engine is at low idle RPM (500-800 RPM).
3. With the service brakes applied, put the transmission in the P, PARK, position.
4. Engage the park pawl by slowly releasing the service brakes. The vehicle may move slightly as the pawl engages.
5. Apply the parking brake and ensure it is properly engaged.
6. Run the engine for at least one minute. Apply the service brakes and shift to D, DRIVE, then to N, NEUTRAL, and then shift to R, REVERSE, in
order to fill the hydraulic system.
7. Ensure that the engine is at low idle RPM (500-800 RPM).
8. With the service brakes applied, put the transmission in the P, PARK, position.
9. Engage the park pawl by slowly releasing the service brakes. The vehicle may move slightly as the pawl engages.
10. With the engine running, remove the fluid level indicator from the fill tube and wipe the indicator clean.
11. Insert the fluid level indicator into the fill tube and remove. Check the fluid level reading. Repeat the check procedure to verify the reading.
Important:
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If the fluid level is within the COLD CHECK band, the transmission may be operated until the fluid is hot enough to perform a HOT RUN
check. If the fluid level is not within the COLD CHECK band, add or drain as necessary to bring it to the middle of the COLD CHECK band.
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Always check the fluid level at least twice using the procedure described above. Consistent readings are important in order to maintaining
proper fluid level. If inconsistent readings persist, inspect the transmission vent assembly to be sure that it is clean and unclogged. If readings
are still inconsistent, contact your nearest Allison distribution or dealer.
12. Perform a hot check at the first opportunity after the normal operating sump temperature of 71 - 93°C (160 - 200°F) is reached.
Hot Fluid Check
1. Operate the transmission in D, DRIVE, range until normal operating temperature is reached. Normal operating temperature is any of the following:
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Sump temperature 71 - 93°C (160 - 200°F)
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Converter-out temperature 82 - 104°C (180 - 220°F)
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If a transmission temperature gage is not present, check the fluid level when the engine water temperature gage has stabilized and the
transmission has been operated under load for at least one hour.
Important: The fluid must be hot to ensure an accurate check. The fluid level rises as temperature increases.
2. Bring the vehicle to a complete stop on a level surface using the service brake.
3. Ensure that the engine is at low idle RPM, 500-800 RPM.
4. With the service brakes applied, place the transmission in the P, PARK, position.
5. Engage the park pawl by slowly releasing the service brakes. The vehicle may move slightly as the pawl engages.
6. Apply the parking brake and ensure it is properly engaged.
7. With the engine running, remove the fluid level indicator from the fill tube and wipe the indicator clean.
8. Insert the fluid level indicator into fill the tube and remove. Check fluid level reading. Repeat the check procedure to verify the reading.
Important: Always check the fluid level at least twice using the procedure described above. Consistent readings are important to maintaining
proper fluid level. If inconsistent readings persist, inspect the transmission vent assembly to be sure it is clean and unclogged. If readings are still
inconsistent, contact your nearest Allison distribution or dealer.
9. If the fluid level is not within the HOT RUN band, add or drain as necessary to bring the fluid level to within the HOT RUN band.
Important: Safe operating level is within the HOT RUN band on the fluid level indicator. The width of the HOT RUN band represents
approximately 1.0 liter (1.06 quarts) of fluid at normal operating sump temperature.
Fluid Inspection