operators_manual

For Peterbilt Vehicles
How to Deactivate MAX Mode
Vehicles with automated transmissions will
have the engine brake function integrated
with the transmission controls. Follow
these steps to deactivate MAX engine
brake mode.
1. Accelerate with the throttle pedal.
2. Upshift, see Up or Down Shifting
on page 145.
3. Wait for the transmission coast
down gear to engage.
4. Reduce engine brake level, see
Engine Brake Operation for a
Vehicle with Automated
Transmission on page 135.
5. Re-initiate
MAX mode, see Engine
Brake Operation for a Vehicle with
Automated Transmission on page
135.
6. Select Neutral N, see Drive Neutral
Reverse Selector on page 146.
7. Select LOW mode, see Engine
Brake Operation for a Vehicle with
Automated Transmission on page
135.
Up or Down Shifting
When in the Manual mode, the
transmission gears can be manually
selected by pushing or pulling on the lever.
Pushing the lever forward will down shift.
Pushing and holding the lever forward will
engage the LOW gear range. Pulling the
lever towards the driver will upshift the
transmission.
Some vehicles may have a feature that
prompts the operator to shift for optimal
fuel economy.
For Peterbilt Vehicles with Shift Assist
If the prompt appears in the instrument
cluster, use the manual gear selector lever
to change gears.
DRIVING - Transmission
Y53-6047-2HEN (03/18) 145
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