NOTE: If attempting to select a non-Neutral
mode without applying the service brakes, the
transmission will not shift into gear. To shift into
gear, select Neutral, apply the service brakes,
and select the desired mode again.
Transmission Prognostics
The Allison transmission prognostics display can be
found by navigating to the maintenance screens in
the driver display. The prognostics screen displays
information on the transmission health status (oil filter
status, oil level, and oil life). See
Fig. 17.14. If trans-
mission health falls below acceptable limits, a mes-
sage will be shown on the driver display.
NOTE: For a valid oil level measurement, the
vehicle must be stopped on a level surface with
the transmission in neutral (N).
f611483a10/21/2019
Fig. 17.14, Allison Transmission Prognostics
Automated and Automatic Transmissions
17.13
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