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Chapter 20
End of Chapter Review Questions Answer Key
1. Which letters in the suffix of the Eaton Roadranger transmission serial number
indicate that the transmission is an UltraShift AMT?
2. Which component on an Eaton AMT performs the mechanical function of the shift
lever on the standard Roadranger transmission?
3. Which of the following correctly describes the gear select motor used on an AutoShift
transmission?
4. What type of sensor is used to signal shift finger position to the transmission ECU in a
current Eaton AMT?
5. Which of the following components is responsible for effecting shifts in the
transmission auxiliary box?
6. Which component in the AutoShift system protects the circuit electrical and electronic
systems from voltage spikes by acting as an electronic voltage regulator?
7. What is the usual location of an Eaton AMT ECU?
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8. What is the function of the inertia brake used in the AutoShift transmission?
9. To which Eaton AMT component is the driver shift lever signal command directed?
10. What component does a three-pedal AMT have that is not used on a two-pedal
system?
11. When a five-speed fallback fault is displayed by Eaton AMT electronics, where is the
source of the fault?
12. What would be the performance outcome if an Eaton AMT defaults to one-speed
fallback mode?
13. Technician A says that when an AMT is described as a two-pedal system, the clutch is
eliminated. Technician B says that when an AMT is described as three-pedal, the
clutch pedal is eliminated. Who is correct?
14. An Eaton AMT will not shift out of second gear and Technician A says that an in–
place (logged) fallback failure strategy could be the cause. Technician B says that
when the AMT is in downshift fallback, only downshifts can be made until the
vehicle is brought to a standstill. Who is correct?
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15. Technician A says that AMT faults can only be read by the OEM software.
Technician B says that AMT fault codes can be accessed by connecting to the chassis
data bus. Who is correct?
16. Which of the following AMT identification letters indicate that an UltraShift
transmission uses a wet clutch?
17. Which of the following AMT identification letters indicate that an UltraShift is
equipped with a centrifugal clutch?
18. Technician A says that the motor-generator used in an Eaton hybrid electric
transmission generates AC. Technician B says that the motor-generator used in an
Eaton hybrid-electric transmission can be driven by AC. Who is correct?
19. Technician A says that the UltraShift AMT uses a pneumatic clutch actuator.
Technician B says that the Detroit DT-12 AMT uses a pneumatic clutch actuator.
Who is correct?
20. What is the energy storage device used in an Eaton HLA transmission?