Heavy Duty Truck Systems – Chapter 20 – Lecture Summary & Practice Questions
Which letters in the suffix of the Eaton Rearranger transmission serial number indicate that the
transmission is an Auto Shift electronically automated version? - correct answer ✔✔AS
Which component on the AutoShift transmission performs the mechanical function of the shift
lever on the standard Roadranger transmission? - correct answer ✔✔the shift finger
Which of the following correctly describes the gear select motor used on an AutoShift
transmission? - correct answer ✔✔a reversing dc motor
What type of sensor is used to signal shift finger position to the transmission ECU in a current
AutoShift transmission? - correct answer ✔✔a hall effect sensor
Which of the following components is responsible for effecting shifts in the transmission
auxiliary box? - correct answer ✔✔range valve solenoid
Which component in the AutoShift system protects the circuit electrical and electronic systems
from voltage spikes by acting as an electronic voltage regulator? - correct answer ✔✔a reverse
voltage zener diode
What is the usual location of the AutoShift ECU? - correct answer ✔✔on the left side of the
transmission
What is the function of the inertia brake used in the AutoShift transmission? - correct answer
✔✔It slows the countershaft during initial engagement.
To which AutoShift component is the driver shift lever signal command directed? - correct
answer ✔✔transmission ecu
Which letters in the suffix of the Eaton Rearranger transmission serial number indicate that the
transmission is an Auto Shift electronically automated version? - correct answer ✔✔AS
Which component on the AutoShift transmission performs the mechanical function of the shift
lever on the standard Roadranger transmission? - correct answer ✔✔the shift finger
Which of the following correctly describes the gear select motor used on an AutoShift
transmission? - correct answer ✔✔a reversing dc motor
What type of sensor is used to signal shift finger position to the transmission ECU in a current
AutoShift transmission? - correct answer ✔✔a hall effect sensor
Which of the following components is responsible for effecting shifts in the transmission
auxiliary box? - correct answer ✔✔range valve solenoid
Which component in the AutoShift system protects the circuit electrical and electronic systems
from voltage spikes by acting as an electronic voltage regulator? - correct answer ✔✔a reverse
voltage zener diode
What is the usual location of the AutoShift ECU? - correct answer ✔✔on the left side of the
transmission
What is the function of the inertia brake used in the AutoShift transmission? - correct answer
✔✔It slows the countershaft during initial engagement.
To which AutoShift component is the driver shift lever signal command directed? - correct
answer ✔✔transmission ecu
