Transmission Limp Home Mode
Transmission function is monitored electronically for
abnormal conditions. If a condition is detected that could
result in transmission damage, Transmission Limp Home
Mode is activated. In this mode, the transmission remains
in fourth gear (for 66RFE transmission) or third gear (for
AS66RC transmission) regardless of which forward gear
is selected. If an AS66RC equipped truck enters Limp
Home Mode at highway speeds, it will initially engage
fifth gear, until the vehicle slows to a speed where third
gear can be engaged. PARK, REVERSE, and NEUTRAL
will continue to operate. The Malfunction Indicator Light
(MIL) may be illuminated. Limp Home Mode allows the
vehicle to be driven to an authorized dealer for service
without damaging the transmission.
In the event of a momentary problem, the transmission
can be reset to regain all forward gears by performing the
following steps:
1. Stop the vehicle.
2. Shift the transmission into PARK.
3. Turn the ignition switch to the OFF position.
4. Wait approximately 10 seconds.
5. Restart the engine.
6. Shift into the desired gear range. If the problem is no
longer detected, the transmission will return to normal
operation.
NOTE:
Even if the transmission can be reset, we recom-
mend that you visit your authorized dealer at your
earliest possible convenience. Your authorized dealer has
diagnostic equipment to determine if the problem could
recur.
If the transmission cannot be reset, authorized dealer
service is required.
342
STARTING AND OPERATING
Summary of Contents for CHASSIS CAB 2015
Page 4: ......
Page 7: ...1 INTRODUCTION 5 ...
Page 10: ......
Page 199: ...INSTRUMENT CLUSTER BASE 4 UNDERSTANDING YOUR INSTRUMENT PANEL 197 ...
Page 200: ...INSTRUMENT CLUSTER PREMIUM 198 UNDERSTANDING YOUR INSTRUMENT PANEL ...
Page 312: ...Uconnect 5 0 Uconnect 8 4A 8 4AN 310 UNDERSTANDING YOUR INSTRUMENT PANEL ...
Page 326: ......
Page 393: ...5 STARTING AND OPERATING 391 ...
Page 458: ......
Page 559: ...MAINTENANCE SCHEDULES CONTENTS 䡵 MAINTENANCE SCHEDULE 558 Maintenance Chart 560 8 ...
Page 577: ...INDEX 10 ...