Workbook, Heavy Duty Truck Systems, 6E
Chapter Nineteen – Answer Key
1. Technician A says that automatic transmission oil levels must be checked at both hot and
cold oil levels. Technician B says that the hot check should be made when the
transmission oil temperature is 140°F. Who is correct?
2. Oil and filter change intervals for on-highway trucks should be:
3. Technician A says that the governor feed filter should be changed at every oil/filter
change. Technician B says that all the transmission bearings should be replaced if metal
contaminants are found in the oil pan. Who is correct?
4. Technician A says that an auxiliary filter may be installed in the oil return line between
the oil cooler and the transmission. Technician B says that an auxiliary filter is usually
installed following a transmission failure. Who is correct?
5. Technician A says that a stall test should not exceed 1 minute. Technician B says that
converter-out temperature should not exceed 300°F (150°C). Who is correct?
6. Which of the following determines when an automatic shift takes place?
7. Which of the following should be used as the base reference speed for making
adjustments on an automatic transmission?
8. Technician A says that a 1–2 shift on a four-speed automatic should occur at
approximately 2 mph (3 kph) below the top speed in first gear. Technician B says that the
2–3 shift on a four-speed automatic should occur at approximately 2 mph (3 kph) above
the top speed for second gear. Who is correct?
9. Which of the following would not be a cause of shift cycling?
10. Which of the following would not be the cause of premature upshifts?