Workbook, Heavy Duty Truck Systems, 6E
Chapter Twenty-Two – Answer Key
1. Technician A says that oversized driveshafts can place excessive strain on transmission
and drive axle components. Technician B says that driveshaft slip splines are often coated
with phosphate or polymer skins. Who is correct?
2. When lubricating U-joints, which of the following is correct practice?
3. Technician A says that the yokes in a driveshaft propeller must be aligned when
assembled at the slip splines. Technician B says that exceeding maximum U-joint
working angles can greatly shorten service life. Who is correct?
4. Technician A says that driveshaft length is the main factor in determining the U-joint
working angles. Technician B says that driveshaft speed fluctuations can be smoothed by
setting the U-joints 90 degrees out-of-phase. Who is correct?
5. Which is the recommended type of grease to be used in heavy-duty truck U-joints?
6. When greasing a slip joint, which of the following is the correct procedure?
7. Which of the following would be a likely cause of galling on trunnion races?
8. What is the general specification for maximum transmission yoke runout?
9. What is the maximum ovality specification for a heavy-duty driveshaft?
10. Which of the following could cause the U-joint working angles to change?