WORKHORSE CUSTOM CHASSIS
Service Manual
2007 W Series
SECTION
7.2
PAGE
504
Automatic Transmission – Allison
2007 W Series Chassis
© 2006 Workhorse Custom Chassis — All Rights Reserved
WSM082106
TRANSMISSION REPLACEMENT (WITH 8.1L (L18)
ENGINE)
Tools Required
• J 21366 Converter Holding Strap
• J 44257 Connector Removal Tool
Removal Procedure
IMPORTANT:
If replacing a failed transmission, the “FastLearn”
If replacing a failed transmission, the “FastLearn”
(adapt) procedure must be performed. This can be
(adapt) procedure must be performed. This can be
done in one step using a scan tool. If this procedure is
done in one step using a scan tool. If this procedure is
not done, the transmission control module’s (TCM’s)
not done, the transmission control module’s (TCM’s)
adaptive valves will be at the settings that it learned for
adaptive valves will be at the settings that it learned for
the old transmission, and will be in slow adaptive mode.
the old transmission, and will be in slow adaptive mode.
Under these conditions, it would take an unacceptably
Under these conditions, it would take an unacceptably
long time for the adaptive values to converge to levels
long time for the adaptive values to converge to levels
suitable for the new transmission.
suitable for the new transmission.
1. Disconnect the negative battery cable. Refer to Battery
Negative Cable Disconnection and Connection .
2. Remove the transmission fl uid level indicator.
3. Raise and suitably support the vehicle. Refer to Lifting
and Jacking the Vehicle .
4. Remove the engine protection shield bolts and shield.
5. Remove the starter motor bolts and position the starter
motor aside.
6. Drain the transmission fl uid, if necessary.
7. Remove the propeller shaft. Refer to Propeller Shaft
Replacement.
