NMC-WOLLARD 100 - Page 822

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 166
CHAPTER 5 MANUFACTURER’S INFORMATION
GM 4L70 TRANSMISSION
© 2013 General Motors. All rights reserved
Transmission Maintenance Information
Transmission Fluid Level and Condition Check
This procedure checks the transmission fluid level, as well as the condition of the fluid
itself.
Caution: Always use the proper automatic transmission fluid listed. Using incorrect
automatic transmission fluid may damage the vehicle.
Before checking the fluid level, perform the following:
1. Start the engine and park the vehicle on a level surface. Keep the engine
running.
2. Apply the parking brake and place
the shift lever in PARK (P).
3. Depress the brake pedal and move the shift lever through each gear range,
pausing for about 3 seconds in ea ch range. Then, move the shift lever back to
PARK (P).
4. Allow the engine to idle 500–800 RPM for at least 1 minute. Slowly release the
brake pedal.
5. If the transmission fluid temperature 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
N
ote: Use the cold check 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.
o Use this cold check procedure to check fluid level when the
transmission fluid temperature is between 27–32°C (80–90°F).
2. Start the engine and locate the transmission dipstick at the rear of the
engine compartme
nt, on the passenger's side of the vehicle.
3. Flip the handle up, and then pull out the dipstick and wipe the dipstick end
with a clean rag or paper towel.