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upshifts and downshifts. This shift
stabilization feature is designed to
determine, before making an
upshift, if the engine will be able to
maintain vehicle speed by analyzing
things such as throttle position,
vehicle load, and hill grade. If the
shift stabilization feature determines
that a current vehicle speed cannot
be maintained, the transmission
does not upshift and instead holds
the current gear. In some cases, this
may appear to be a delayed shift,
however the transmission is
operating normally.
The vehicle's transmission uses
adaptive shift controls. Adaptive
shift controls continually compare
key shift parameters to
pre-programmed ideal shift
conditions stored in the
transmission's computer. The
transmission constantly makes
adjustments to improve vehicle
performance according to the way
the vehicle is being used, such as
with a heavy load. During this
adaptive shift controls process,
some shifts may feel different as the
transmission determines the best
settings for a particular shift.
When temperatures are very cold,
the transmission's gear shifting may
be delayed in providing more stable
shifts until the engine warms up.
Shifts may be more noticeable with
a cold transmission. This difference
in shifting is normal.
This position
lets drivers select the range of gears
appropriate for current driving
conditions. See Range Selection
Mode under
.
Normal Mode Grade Braking is
enabled when the vehicle is started,
but is not enabled in Range
Selection Mode. It assists in
maintaining desired vehicle speeds
when driving on downhill grades by
using the engine and transmission
to slow the vehicle. The first time
the system engages for each
ignition key cycle, a DIC message
will be displayed. See
To disable or enable Normal Mode
Grade Braking within the current
ignition key cycle, press and hold
the Tow/Haul button for
three seconds. A DIC message
displays. See
For information on other forms of
grade braking, see
and
.
.
.
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