WORKHORSE CUSTOM CHASSIS
Service Manual
Automatic Transmission – Allison
2007 W Series
© 2006 Workhorse Custom Chassis — All Rights Reserved
SECTION
7.2
PAGE
71
2007 W Series Chassis
WSM082106
transmission goes to neutral.
If electrical power is interrupted while the transmission is
in second range with subsequent third range operation,
moving the manual selector valve to reverse will cut off
main pressure to the 1-2-3-4 clutch, exhausting the 1-2-
3-4 clutch. The manual selector directs main pressure
through the TCC valve and shift valve 2 to the low and
reverse clutch, applying the clutch. The 3rd, 5th and
reverse clutch remains applied. The combination of the
3rd, 5th, and reverse clutch and the low and reverse
clutch application produces reverse range operation for
limp home capability.
