WORKHORSE CUSTOM CHASSIS
Service Manual
Automatic Transmission – Allison
2007 W Series
© 2006 Workhorse Custom Chassis — All Rights Reserved
SECTION
7.2
PAGE
93
2007 W Series Chassis
WSM082106
Control Panel Operation
Pressing the “P” button shifts the transmission into
Neutral and engages the Park Pawl [in 1000 and 2400
transmissions only]. (See the Allison Transmission’s
Operator’s Manual regarding information for the Park
Pawl.) Park or Neutral are used to start the vehicle.
WARNING:
If Park is selected, and “P” does not display
on the Monitor, the Parking Brake must be
set to prevent the vehicle from moving unex-
pectedly. The system should be checked and
serviced.
WARNING:
On Park equipped transmissions, if the igni-
tion is turned off without shifting to Park;
a buzzer will sound and the display panel
will illuminate and show the gear currently
engaged. Shifting to “P” will engage Park and
turn off the display and buzzer.
NOTE:
On PARK equipped transmissions, if the vehicle engine
On PARK equipped transmissions, if the vehicle engine
is off, the ignition on, and the Park Pawl is not engaged
is off, the ignition on, and the Park Pawl is not engaged
(see Allison Transmission’s Operator’s Manual for Park
(see Allison Transmission’s Operator’s Manual for Park
Pawl information), the MONITOR will display “N” and a
Pawl information), the MONITOR will display “N” and a
buzzer will sound regardless of the operator’s selection.
buzzer will sound regardless of the operator’s selection.
Shifting to “P” will engage Park and turn off the system.
Shifting to “P” will engage Park and turn off the system.
Pressing the “R” button shifts the transmission into
Reverse.
Pressing the “N” button shifts the transmission to
Neutral. Neutral can be used to start the vehicle.
WARNING:
If the transmission is in “N” and the operator
leaves the driver’s station, the vehicle park-
ing brake must be set to prevent the vehicle
from rolling.
Pressing the “D” button shifts the transmission into
Drive and allows the transmission to automatically shift
through the full range of 1st through 6th gears. When
Drive is initially selected, the Select and Monitor displays
read “D1” indicating that Drive has been selected and
the transmission is in 1st gear. As the transmission
automatically upshifts or downshifts, the Select/ Monitor
Display will show which gear the transmission is actually
in – D1, D2, D3, D4, D5, or D6.
Manual Gear Selector– Down
When the transmission is in DRIVE, the down-arrow
button allows the operator to manually downshift one
gear at a time, 5th through 1st. The Select Display will
show what gear range has been selected; the Monitor
Display will show the actual gear range the transmission
is in.
NOTE:
The transmission will not upshift beyond the gear range
The transmission will not upshift beyond the gear range
selected. When DRIVE is selected the full range auto-
selected. When DRIVE is selected the full range auto-
matic shift capability is restored.
matic shift capability is restored.
NOTE:
Selecting DRIVE at any time during the downshift
Selecting DRIVE at any time during the downshift
sequence cancels the manual shifting function and
sequence cancels the manual shifting function and
allows the transmission to shift automatically.
allows the transmission to shift automatically.
