NOTE
Multiple gear upshifts and downshifts
may be allowed when the up/downshift
request procedure is performed multiple
times (Each request equals one gear
change request).
• The transmission may also deny a
shift while ascending or
descending grades if the load of
the vehicle and grade of the terrain
in combination with the drivetrain
ratio and engine torque will fall
outside of the acceptable range to
perform a shift. If the shift is denied
it will sound a tone.
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 Kenworth Vehicle with Shift Assist
For Peterbilt Vehicles with Shift Assist
If the prompt appears in the instrument
cluster, use the manual gear selector lever
to change gears.
DRIVING - Up or Down Shifting
Y53-1272-1B1 (08/17) 15
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