General Information, 10-Speed Range-Shift Transmissions
For complete information on Eaton transmissions, go to the Eaton website,www.roadranger.com.
Eaton Fuller 10-speed transmissions have ten forward speeds and two reverse speeds. Each transmission has a 5-speed front section and a 2-speed auxiliary section.
A range-shift transmission allows for additional ratios provided by a low range and a high range. The ten forward speeds are obtained by twice using a 5-speed shift pattern: first in the low range, then in the high range. See Fig. for the shift patterns.
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High Range
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Low Range
Fig. 1, Eaton Fuller 10-Speed Transmission Shift Patterns
The range-preselection lever selects the low or high range for each ratio. It is used once during an upshift sequence and once during a downshift sequence. The range-preselection lever is down when in the low range, and up when in the high range.
Important: Always preselect range shifts when upshifting or downshifting. Preselection requires that the range lever be moved to the necessary position before starting to shift.
When correctly preselected, range shifts are completed automatically as the lever is moved through neutral and into the next gear. Preselecting range shifts prevents damage to the transmission and provides for smoother shifts.
To operate a range-shift transmission, move the shift knob through all the low-range gear positions and then pull the range-preselection lever up to move into the high-range ratios. Use the same shift knob positions in both the low and high ranges.
Important: Shift patterns vary between transmissions. Be sure to read the shift pattern decal on the dash for the operating instructions for the transmission installed in your vehicle.
Note: The 4th/9th and the 5th/10th shift positions in the RT (direct ratio) and RTX (overdrive ratio) transmissions are directly opposite in the RTO (overdrive ratio) transmissions.