General Information, Eaton Fuller Splitter and Range-Shift Transmissions
For complete information on Eaton transmissions, go to the Eaton website,www.roadranger.com.
Combination splitter and range-shift transmissions allow the choice of two splitter ratios in each shift knob position, as well as the additional ratios provided by a low range and a high range.
Important: Not all ratios are used in each range, and the shift patterns vary between transmissions. Read the shift pattern decal on the dash for the operating instructions for the transmission installed in your vehicle.
Range-Shift
The range-preselection lever selects the low or high range for each transmission 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.
Important: Never make a range shift while moving in reverse.
Splitter Control
Dependent on the transmission model, some ratios can be split using the splitter-control button (located on the side of the shift knob).
Important: Always preselect splitter shifts. Preselection requires that the splitter-control button be moved to the necessary position before starting to shift.
Preselecting splitter shifts allows for smoother and faster shifting. However, do not delay: complete the shift immediately after preselecting the split to avoid unnecessary wear on transmission components.
Important: Never make a splitter shift while moving in reverse.
13-Speed RTLO Models
Eaton Fuller 13-speed transmissions have thirteen forward speeds and two reverse speeds. Each transmission consists of a 5-speed front section and a 3-speed auxiliary section. The auxiliary section contains low- and high-range ratios, plus a splitter gear. See Fig. for the shift pattern.
-
High Range
-
Low Range
-
High (forward)
-
Low (rearward)
-
Splitter Control Button
Fig. 1, Eaton Fuller 13-Speed Transmission Shift Pattern
All thirteen speeds are controlled with one shift knob.
LOW gear in the front section is used only as a starting gear; it is never used when the transmission is in high range. The other four ratios are used once in the low range and once again in the high range.
When in the high range, the gear ratios can be split by using the splitter-control button with the underdrive ratio (RT models), or overdrive ratio (RTO models). When in the low range, the gear ratios cannot be split.
Important: The shift knob has an interlock feature that prevents the splitter-control button from being activated when the range-preselection lever is down (in low range). When in high range with the splitter-control button activated, the range-preselection lever cannot be moved down.
18-Speed RTLO Splitter and Range-Shift Models
Eaton Fuller 18-speed transmissions have eighteen forward speeds and four reverse speeds. Each transmission consists of a 5-speed front section and a 4-speed auxiliary section. The auxiliary section contains low- and high-range ratios, plus a splitter gear.
All eighteen speeds are controlled with one shift knob. All nine ratios in both the low and high ranges can be split.
LOW gear in the front section is used only as a starting gear; it is never used when the transmission is in high range. LOW gear can be split, to provide both a direct and an overdrive ratio.