When to Check and Change Automatic Transmission Fluid
It is usually not necessary to check the transmission fluid level. The only
reason for fluid loss is a transmission leak or overheating the transmission. If you
suspect a small leak, then use the following checking procedures to check the fluid
level. However, if there is a large leak, then it may be necessary to have the vehicle
towed to a dealer/retailer service department and have it repaired before driving
the vehicle further.
Notice: Use of the incorrect automatic transmission fluid
may damage the vehicle, and the damages may not be covered by the vehicle's warranty.
Always use the automatic transmission fluid listed in
Recommended Fluids and Lubricants
.
Change the fluid and filter at the intervals listed in the Maintenance Schedule.
See
Scheduled Maintenance. Be sure to use
the transmission fluid listed in
Recommended Fluids and Lubricants.
How to Check Automatic Transmission Fluid
Notice: Too much or too little fluid can damage your transmission.
Too much can mean that some of the fluid could come out and fall on hot engine parts
or exhaust system parts, starting a fire. Too little fluid could cause the transmission
to overheat. Be sure to get an accurate reading if you check your transmission
fluid.
Before checking the fluid level, prepare the vehicle as follows:
- Start the engine and park the vehicle on a level surface. Keep the engine
running.
- Apply the parking brake and place the shift lever in P (Park).
- With your foot on the brake pedal, move the shift lever through each gear
range, pausing for about three seconds in each range. Then, move the shift lever back
to P (Park).
- Allow the engine to idle (500 - 800 rpm) for at least one minute.
Slowly release the brake pedal.
- Keep the engine running and press the Trip/Fuel button or trip odometer
reset stem until TRANS TEMP (Transmission Temperature) displays on the Driver Information
Center (DIC).
- Using the TRANS TEMP reading, determine and perform the appropriate check
procedure. If the TRANS TEMP reading is not within the required temperature ranges,
allow the vehicle to cool, or operate the vehicle until the appropriate transmission
fluid temperature is reached.
Cold Check Procedure
Use this procedure only as a reference to determine if the transmission has
enough fluid to be operated safely until a hot check procedure can be made. The hot
check procedure is the most accurate method to check the fluid level. Perform the
hot check procedure at the first opportunity. Use this cold check procedure to check
fluid level when the transmission temperature is between 80°F and 90°F (27°C
and 32°C).
Locate the transmission dipstick at the rear of the engine compartment, on the
passenger side of the vehicle.
- See
Engine Compartment Overview for
more information.
- Flip the handle up, and then pull out the dipstick and wipe it with a
clean rag or paper towel.
- Install the dipstick by pushing it back in all the way, wait three seconds,
and then pull it back out again.
- Check both sides of the dipstick, and read the lower level. Repeat the
check procedure to verify the reading.
- If the fluid level is below the COLD check
band, add only enough fluid as necessary to bring the level into the COLD band. It
does not take much fluid, generally less than one pint (0.5L). Do not overfill.
- Perform a hot check at the first opportunity after the transmission reaches
a normal operating temperature between 160°F to 200°F (71°C to 93°C).
- If the fluid level is in the acceptable range, push the dipstick back
in all the way, then flip the handle down to lock the dipstick in place.
Hot Check Procedure
Use this procedure to check the transmission fluid level when the transmission
fluid temperature is between 160°F and 200°F (71°C and 93°C).
The hot check is the most accurate method to check the fluid level. The hot
check should be performed at the first opportunity in order to verify the cold check.
The fluid level rises as fluid temperature increases, so it is important to ensure
the transmission temperature is within range.
Locate the transmission dipstick at the rear of the engine compartment, on the
passenger side of the vehicle.
- See
Engine Compartment Overview for
more information.
- Flip the handle up, and then pull out the dipstick and wipe it with a
clean rag or paper towel.
- Install the dipstick by pushing it back in all the way, wait three seconds,
and then pull it back out again.
- Check both sides of the dipstick, and read the lower level. Repeat the
check procedure to verify the reading.
- Safe operating level is within the HOT cross
hatch band on the dipstick. If the fluid level is not within the HOT band, and the
transmission temperature is between 160°F and 200°F (71°C and 93°C),
add or drain fluid as necessary to bring the level into the HOT band. If the fluid
level is low, add only enough fluid to bring the level into the HOT band. It does
not take much fluid, generally less than one pint (0.5L). Do not overfill.
- If the fluid level is in the acceptable range, push the dipstick back
in all the way, then flip the handle down to lock the dipstick in place.
Consistency of Readings
Always check the fluid level at least twice using the procedures described.
Consistency is important to maintaining proper fluid level. If fluid is
added, it may take 15 minutes or longer to obtain an accurate reading because of residual
fluid draining down the dipstick tube. If inconsistent readings persist, check the
transmission breather to be sure it is clean and not clogged. If readings are still
inconsistent, contact your dealer/retailer.