Upshifting
cen dm 08.06.002
- 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).
- Position the range preselection lever down, into low range. 3.
- Depress the clutch pedal to the floor; shift into low or 1st gear (see Table. ), 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.
- Shift progressively upward from low or 1st gear, to the top gear in low range (see Table. ), double-clutching between shifts, and accelerating to 80 percent of engine governed speed.
- 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 ( see Table. ). As the shift lever passes through neutral, the transmission
will automatically shift from low range to high range.
Table 1, Eaton Fuller Shift Progressions
Eaton Fuller Shift Progressions
TRANS. MODEL
LOW RANGE
HIGH RANGE
Off-Highway
On-Highway
8-Speed Direct (RT)
9-Speed Direct or Overdrive (RT or RTX)
9-Speed Direct (RTX-P)
9-Speed Overdrive (RTO)
10-Speed Direct or Overdrive (RT or RTX)
10-Speed Overdrive (RTO)
Table 1, Eaton Fuller Shift Progressions
- With the transmission in high range, shift progressively upward through each of the high range gears (see Table.), double-clutching between shifts.
Caution: To prevent damage to the range section synchros, make sure the range preselection lever is in high range before moving the shift lever to neutral. Leave the shift lever in neutral long enough to be sure the range section has shifted.
Note: