freightliner 108SD, Driver Manual

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Eaton Fuller 10-Speed Range-
Shift Transmissions
For complete information on Eaton transmissions, go
to the Eaton website,
www.roadranger.com .
General Information, 10-Speed
Range-Shift Transmissions
Eaton Fuller 10-speed transmissions have ten for-
ward speeds and two reverse speeds. Each trans-
mission 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. 13.3 for the 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 com-
pleted automatically as the lever is moved through
neutral and into the next gear. Preselecting range
shifts prevents damage to the transmission and pro-
vides 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 posi-
tions in both the low and high ranges.
IMPORTANT: Shift patterns vary between trans-
missions. 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 posi-
tions in the RT (direct ratio) and RTX (overdrive
ratio) transmissions are directly opposite in the
RTO (overdrive ratio) transmissions.
Operation Tips, Eaton Fuller Range-
Shift Transmissions
The following tips highlight important operation prin-
ciples.
•
For all conditions, use the highest gear that is
still low enough to start the vehicle moving with
the engine at or near idle speed, and without
slipping the clutch excessively.
•
Use the clutch brake to stop gear rotation
when shifting into LOW or reverse while the
vehicle is stationary. The clutch brake is actu-
ated by depressing the clutch pedal all the way
to the floor.
•
Partially disengage the clutch to break engine
torque during normal gear shifts.
•
Double-clutch between all upshifts and down-
shifts.
•
Never push the range-preselection lever down
into low range while operating in high range,
except when downshifting from 5th gear to 4th
gear.
•
Do not shift from high range to low range at
high vehicle speeds.
•
Preselect all range shifts. Move the range-
preselection lever to the needed position be-
fore starting to shift.
•
Never make a range shift while the vehicle is
in reverse.
4
N
7
2 9
6
1 8
3 10
5
R
HI
LO
f261053
A
B
12/15/1999
A. High Range B. Low Range
Fig. 13.3, Eaton Fuller 10-Speed Transmission Shift
Patterns
Manual Transmissions and Clutch
13.4