NMC-WOLLARD 2021Truax Blvd., Eau Claire, WI 54703, Phone (715) 835-3151, Fax (715) 835-6625
M100 Tow Tractor Manual No. 46052
DECEMBER 15, 2013
PAGE 167
CHAPTER 5 MAUFACTURER’S INFORMATION
GM 4L70 TRANSMISSION
© 2013 General Motors. All rights reserved
4. Install the dipstick by pushing it back in the dipstick tube all the way, wait
three seconds and then pull it back out again.
Note: Always check the fluid level at least twice. Consistent readings are
important to maintaining proper fluid level. If inconsistent readings are
noted, inspect the transmission vent assembly to ensure it is clean and
unclogged.
5. Keep the dipstick pointing down and check both sides of the dipstick, and
read the lower level. Repeat the check procedu
re to verify the reading.
6. Inspect the color of the fluid on the dipstick. Refer to Fluid Condition
Inspection in this procedure.
7. If the fluid level is below the COLD check line, add only enough fluid as
necessary to bring the level into the COLD line. It does not take much
uid, generally less than one pint (0.5L). Do not overll.
8. 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.
9. Perform a hot check at
the first opportunity after the transmission reaches
a normal operating temperature between 82–93°C (180–200°F).
Hot Check Procedure
Note: Use this procedure to check the transmission fluid level when the
transmission fluid temperature is between 82–93°C (180–200°F). The hot
check procedure 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 t
ransmission temperature is within range.
1. Start the engine and locate the transmission dipstick at the rear of the
engine compartment, on the passenger side of the vehicle.
2. Flip the handle up, and then pull out the dipstick and wipe the dipstick end
with a clean rag or paper towel.
3. Install the dipstick by pushing it back in the dipstick tube all the way, wait
three seconds and then pull it back out.
Note: Always check the fluid level at least twice. Consistent readings are
important to maintaining proper flui
d level. If inconsistent readings are
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