freightliner Custom Classic MT45 2022, Maintenance Manual

Page: 54 / 138

Hot Check
1. Operate the transmission in a drive range until
normal operating temperature, 160 to 200°F (71
to 93°C), is reached.
NOTE: The fluid must be warm to ensure an
accurate check. The fluid level rises as tempera-
ture increases.
2. Park the vehicle. Shift to neutral (N) and apply
the parking brake. Let the engine run at idle.
3. Wipe the dipstick clean and check the fluid level.
A safe operating level is any level within the HOT
RUN (upper) band on the dipstick. See
Fig. 2 .
4. If the fluid is not within this range, add or drain
fluid as needed to bring the level to the top of
the HOT RUN band. See
Table 1 for approved
transmission lubricants, and Table 2 for lubricant
capacities.
26–03 Allison Transmission
Fluid and Filter
Changing
IMPORTANT: For oil and filter change intervals,
see the applicable Allison Operator’s Manual.
For Allison Transmission Operators Manual and War-
ranty Information for on-highway vehicle applications,
visit
www.allisontransmission.com/my-
allison/customer or scan the QR code. See Fig. 3 .
08/27/96 f270007
1
2
1. COLD RUN Band 2. HOT RUN Band
Fig. 2, Dipstick Markings
f261566 05/17/2022
Fig. 3, Allison Transmission QR Code
Transmission
26
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