Upshifting

m2 dm 08.06.002
  1. When operating off-highway or under adverse conditions, always use low gear when starting to move the vehicle.
    When operating on-highway, with no load or under ideal conditions, use first gear when starting to move the vehicle.
    For all conditions, use the highest gear that is still low enough to start the vehicle moving with the engine idling and without excessively slipping the clutch.
  2. Use the clutch brake to stop gear rotation when shifting into low (or first) or reverse when the vehicle is stationary. The clutch brake is applied by pressing the clutch pedal all the way to the floor.
    For normal upshifts and downshifts, only a partial disengagement of the clutch is necessary to break engine torque.
  3. Do not make range shifts with the vehicle moving in reverse gear.
  4. Never attempt to move the range preselection lever with the gear shift lever in neutral while the vehicle is moving. Preselection with the range preselection lever must be made prior to moving the shift lever out of gear into neutral.
  5. Do not shift from high range to low range at high vehicle speeds.
  6. Use double-clutching between all upshifts and downshifts.
  7. After your shifting ability improves, you may want to skip some of the ratios. This may be done only when operating conditions such as load, grade, and road speed permit.
  8. Position the gear shift lever in neutral. Start the engine and bring the air system pressure up to 100 to 120 psi (689 to 827 kPa).
  9. Position the range preselection lever down into low range.
  10. Press the clutch pedal to the floor. Shift into low or first gear, then engage the clutch with the engine at or near idle speed to start the vehicle moving. Accelerate to 80 percent of engine governed speed.
  11. Shift progressively up from low or 1st gear to the top gear in low range, double-clutching between shifts and accelerating to 80 percent of engine governed speed.
  12. While in the top gear of the low-range shift pattern and ready for the next upshift, flip the range preselection lever up into high range. Double-clutch through neutral and shift into the bottom gear in high range. As the shift lever passes through neutral, the transmission will automatically shift from low range to high range.
  13. With the transmission in high range, shift progressively up through each of the high range gears, double-clutching between shifts.
Note:
Parent topic: Operation, Range-Shift
Document Number: 0000117793
Manual Publication Date: 2025-02-11
Topic Publication Date: 2024-05-09