range gears (
Table 8.1
), double-clutching be-
tween shifts.
Downshifting
1.
With the transmission in high range, shift pro-
gressively downward to the bottom gear in high
range, double-clutching between shifts.
2.
When in the bottom gear of the high-range shift
pattern, and ready for the next downshift, push
the range preselection lever down into low range.
Double-clutch through neutral, and shift into the
top gear of the low-range shift pattern. As the
shift lever passes through neutral, the transmis-
sion will automatically shift from high range to
low range.
3.
With the transmission in low range, downshift
through the low range gears as conditions re-
quire.
IMPORTANT: Never use the clutch brake when
downshifting, or as a brake to slow the vehicle.
Eaton Fuller Splitter and
Range-Shift Transmissions
Refer to the Eaton website for additional information,
www.roadranger.com
.
General Information, Eaton Splitter
and Range-Shift
13-Speed RTLO Models
Eaton Fuller 13-speed transmissions have thirteen
forward speeds and two reverse speeds. Each trans-
mission has a 5-speed front section, and a 3-speed
auxiliary section. The auxiliary section contains low-
and high-range ratios, plus an overdrive splitter gear.
See
Fig. 8.17
for the shift pattern.
All of the 13 speeds are controlled with one shift
lever. A range preselection lever and a splitter control
button are built into the shift knob. The range prese-
lection lever controls range selection and the splitter
control button (located on the side of the shift knob)
controls gear splits.
Low gear in the front section is used only as a start-
ing ratio. The remaining four forward positions are
used once in the low range and once in the high
range. However, each of the four high range gear
positions can be split with the underdrive ratio (RT
models), or overdrive ratio (RTO models) of the split-
ter gear. Ratios cannot be split while the transmis-
sion is in low range.
18-Speed RTO Models
Eaton Fuller 18-speed transmissions have eighteen
forward speeds and four reverse, consisting of a
5-speed front section and a 3-speed auxiliary sec-
tion. The auxiliary section contains low and high
range ratios, plus an overdrive splitter gear. See
Fig. 8.18
for the shift pattern.
One ratio in the front section (low) is used as a start-
ing ratio; it is never used when the transmission is in
high range.
R
1
3
2
4
LOW
Dir
OD
5
5
Dir
OD
Dir
OD
Dir
OD
7
7
6 6
8
8
Hi
Lo
A
B
C
D
1
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N
A. High Range
B. Low Range
C. Overdrive (forward)
D. Direct Drive (rearward)
1.
Splitter Control Button
Fig. 8.17, Eaton Fuller 13-Speed Transmission Shift
Pattern
N
R
1
Dir
5
Dir
5
OD
1
OD
3
Dir
7
Dir
7
OD
3
OD
2
Dir
6
Dir
6
OD
2
OD
4
Dir
8
Dir
8
OD
4
OD
LOW
Dir
LOW
OD
A
B
C
D
1
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A. High Range
B. Low Range
C. Overdrive (forward)
D. Direct Drive (rearward)
1.
Splitter Control Button
Fig. 8.18, Eaton Fuller 18-Speed Transmission Shift
Pattern
Transmissions
8.18