14
Operation
Transmission MANUAL / LOW Mode Override
The transmission system may automatically override or prevent the driver's
Upshift or Downshift request on the transmission driver interface device or
automatically initiate a gear change based on vehicle operating conditions. If the
transmission system overrides or prevents a mode request, an audible tone
may be emitted.
• If the transmission is being back-driven and the engine is approaching
its high RPM level limit, the transmission system will override the
MANUAL or LOW mode functions and perform an Upshift to prevent
engine damage.
NOTICE: The transmission system initiates Upshifts for engine overspeed
protection. Refer to
“Engine Overspeed Protection” on page 20.
• If the driver manually selects a start gear using the transmission driver
interface device that, when engaged, causes the engine to lug at a
launch, the transmission system will override the MANUAL mode
request and select an appropriate start gear to prevent engine lugging
and possible damage.
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