WORKHORSE CUSTOM CHASSIS
Service Manual
2007 W Series
SECTION
7.2
PAGE
14
Automatic Transmission – Allison
2007 W Series Chassis
© 2006 Workhorse Custom Chassis — All Rights Reserved
WSM082106
Solenoid and Clutch Chart (Tow/Haul)
Range
Status
Logic
State
Clutch to
Line
Pressure Control Solenoids
Shift Solenoids
TCC
Sol.
PCS1
PCS2
SS1
SS2
SS3
Upshift
4-5
4-5-6
Clutch
De-energized; 3rd, 5th, and Reverse
Clutch Trimming On
De-energized; 1-2-3-4 Clutch
Trimming Off
ON
OFF
ON
ON
Downshift
5-4
4-5-6
Clutch
De-energized; 3rd, 5th, and Reverse
Clutch Trimming Off
De-energized; 1-2-3-4 Clutch
Trimming On
ON
OFF
ON
ON
Steady State
5
4-5-6
Clutch
De-energized; 3rd, 5th, and Reverse
Clutch Applied
De-energized; 2-6 Clutch Exhausted
OFF
OFF
ON
ON
Upshift
5-6
4-5-6
Clutch
Energized; 3rd, 5th, and Reverse
Clutch Trimming Off
Energized; 2-6 Clutch Trimming On
OFF
OFF
ON
ON
Downshift
6-5
4-5-6
Clutch
De-energized; 3rd, 5th, and Reverse
Clutch Trimming On
De-energized; 2-6 Clutch Trimming
Off
OFF
OFF
ON
ON
Steady State
6
4-5-6
Clutch
Energized; 3rd, 5th, and Reverse
Clutch Exhausted
Energized; 2-6 Clutch Applied
OFF
OFF
ON
ON
SHIFT SPEED (1-2 AND 2-3 SHIFTS)
1-2 Shift Output Shaft RPM
2-3 Shift Output Shaft RPM
Engine
% of TPS
12
25
50
100
12
25
50
100
Mode
L18
8.1L
Normal
462
636
1040
1300
867
1127
1792
2312
L18
8.1L
Tow/Haul
722
722
1040
1300
1445
1445
1792
2370
SHIFT SPEED (3-4, 4-5, 5-6 AND CT DOWNSHIFTS)
3-4 Shift Output
Shaft RPM
4-5 Shift Output
Shaft RPM
5-6 Shift Output
Shaft RPM
Closed Throttle Downshift Output
Shaft RPM
6-5
5-4
4-3
3-2
2-1
Engine
% of TPS
12
25
50
12
25
50
12
25
50
0
0
0
0
0
Mode
L18
8.1L
Normal
1185
1474
2370
1647
2081
3237
2451
2451
3488
1994
1517
1243
766
202
L18
8.1L
Tow/Haul
2023
1965
2399
2875
2774
3352
2976
3038
3756
2514
2167
1532
1040
202
