Automatic Transmission Operation
If your vehicle has an automatic transmission,
it features an electronic shift position indicator
within the instrument panel cluster. This display
must be powered anytime the shift lever is moved
out of PARK (P). See Fuses and Circuit Breakers
on page 602.
There are several different positions for your shift
lever.
See “Range Selection Mode” later in this section.
PARK (P): This position locks your rear wheels. It
is the best position to use when you start your
engine because your vehicle cannot move easily. If
your vehicle has the Allison Transmission
®
, with the
Power Take-Off (PTO), use PARK (P) when
starting. The Allison Transmission
®
has a park pawl
that is designed to hold the weight of commercial
medium duty trucks. Therefore, the Allison
Transmission
®
uses larger parts than other
automatic transmissions. These larger parts may
sometimes make a clunking noise when the
selector lever is moved from DRIVE (D) or
REVERSE (R) to PARK (P). This is normal and
there is no damage occurring during these shifts.
When parked on a hill, especially with a heavy load,
you may notice an increase in the effort to shift out
of Park. See Torque Lock (Automatic Transmission)
under Shifting Into Park (P) (Automatic
Transmission) on page 167 for more information.
Automatic Transmission
Allison Transmission
®
136
Содержание Silverado Classic 2007
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