4.
For 13-speed transmissions:
To start the vehicle moving, press the clutch
pedal to the floor, shift into LOW or 1st gear,
then engage the clutch with the engine at or near
idle speed. Accelerate to 80 percent of engine
governed speed.
For 18-speed transmissions:
To start the vehicle moving, press the clutch
pedal to the floor, shift into LOW, then engage
the clutch with the engine at or near idle speed.
To shift from LOW direct to LOW overdrive,
move the splitter-control button into the overdrive
(forward) position, then immediately release the
accelerator. Press and release the clutch pedal.
After releasing the clutch pedal, accelerate
again.
5.
For 13-speed transmissions:
Upshift from LOW (or 1st gear) through 4th gear,
double-clutching during knob shifts, and acceler-
ating to 80 percent of engine governed speed.
See
Fig. 13.1.
For 18-speed transmissions:
Upshift from LOW overdrive to 1st direct by first
moving the splitter-control button into the direct
drive (rearward) position (
Fig. 13.2). Double-
clutch and move the shift knob through neutral to
the 1st gear position.
Continue upshifting through the shift pattern.
Double-clutch during knob shifts (1st to 2nd to
3rd to 4th); single-clutch during split shifts (1st
direct to 1st overdrive, etc.).
6.
When in 4th gear (13-speed transmissions) or
4th overdrive (18-speed transmissions), use the
range-preselection lever and the splitter-control
button to upshift to 5th gear.
While in 4th gear, pull the range-preselection
lever up into high range and move the splitter-
control button to the low (rearward) position.
Double-clutch through neutral and into 5th gear,
engage the clutch, and accelerate the engine.
7.
Upshift progressively through the high range
gears.
To shift from 5th direct to 5th overdrive (or 5th
underdrive to 5th direct on RT model transmis-
sions), move the splitter-control button to the
high (forward) position, then immediately release
the accelerator. Press and release the clutch
pedal. After releasing the clutch, accelerate
again.
Continue upshifting through the shift pattern.
Double-clutch during knob shifts (6th to 7th, etc.);
single-clutch during split shifts (6th direct to 6th
overdrive, etc.).
Downshifting
IMPORTANT: Never use the clutch brake when
downshifting, or as a brake to slow the vehicle.
1.
To downshift from 8th overdrive to 8th direct (or
8th direct to 8th underdrive on RT model trans-
missions), move the splitter-control button to the
low (rearward) position, then immediately release
the accelerator. Press and release the clutch
pedal, then accelerate the engine once the trans-
mission has shifted.
2.
Start the downshift from 8th direct to 7th over-
drive by moving the splitter-control button to the
high (forward) position, then immediately double-
clutch through neutral, moving the shift knob
from 8th gear to 7th gear.
3.
Downshift progressively through each of the high
range gears, alternating the procedures in steps
1 and 2 above until reaching 5th direct.
4.
When in 5th direct and ready for the downshift to
4th (13-speed transmissions) or 4th overdrive
(18-speed transmissions), push the range-
preselection lever down and move the splitter-
control button to the high (forward) position.
Double-clutch through neutral and into 4th gear,
engage the clutch, and accelerate the engine.
5.
Continue downshifting from 4th gear to 1st gear.
For 13-speed transmissions:
Downshift through the low range gears as condi-
tions require.
For 18-speed transmissions:
Continue downshifting from 4th overdrive to 4th
direct, then 4th direct to 3rd overdrive, etc.
Double-clutch during knob shifts (4th to 3th, etc.);
single-clutch during split shifts (4th direct to 3rd
overdrive, etc.).
Manual Transmissions and Clutch
13.3
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