How does shift on the fly work on a truck?
How does shift on the fly work on a truck?
Shift on the Fly. When the shift motor reaches the desired position, as determined by the contact plate position inputs to the GEM, power to the shift relays and motors will be removed. When the transfer case front and rear output shafts are synchronized, the spring loaded lockup collar mechanically engages the mainshaft hub to the drive sprocket.
Where is the shift motor on a Ford truck?
The electronic shift motor is mounted externally at the rear of the transfer case. It drives a rotary cam which moves the mode fork and range fork within the transfer case between the 4X4 HIGH, 4X4 LOW and 2WD range positions.
Why is the transfer case not shifting in my Ford 4×4?
These motors do malfunction on occasion and are the most common cause of the transfer case not shifting. The relay modules behind the dash also malfunction and will sometimes melt the harness connector at the yellow and orange wires that feed the shift motor.
How does the indicator lamp work on a Ford 4×4?
The indicator lamp is activated by feedback from the shift motor, which contains four contact plate position sensors that report motor position back to the electronic shift control module (ESCM) in 1996 and earlier models, and to the generic electronic module (GEM) or the powertrain control module (PCM) in later models.
Shift on the Fly. When the shift motor reaches the desired position, as determined by the contact plate position inputs to the GEM, power to the shift relays and motors will be removed. When the transfer case front and rear output shafts are synchronized, the spring loaded lockup collar mechanically engages the mainshaft hub to the drive sprocket.
The electronic shift motor is mounted externally at the rear of the transfer case. It drives a rotary cam which moves the mode fork and range fork within the transfer case between the 4X4 HIGH, 4X4 LOW and 2WD range positions.
How can I tell if my Ford truck is in 4WD mode?
You can move the control from 2H or 4H at a stop or while driving. The information display may display a message indicating a 4X4 shift is in progress. Once the shift is complete the message center can then display the system mode selected. Note: You may hear some noise as the system shifts or engages; this is normal.
Can a Ford truck be driven in 4×4 high mode?
Note: The vehicle should not be driven in 4X4 High or 4X4 Low modes with the hub locks set to FREE as this condition may damage driveline system components.
