Meritor Range-Shift Transmissions - freightliner Columbia Driver Manual

Transmissions
The lever-only shift is used to skip a full gear.
With the shift button rearward—9th to 7th, 7th to
5th, 5th to 3rd, and 3rd to 1st. With the shift but-
ton forward—10th to 8th, 8th to 6th, 6th to 4th
and 4th to 2nd.
IMPORTANT: Never use the clutch brake when
downshifting, or as a brake to slow the vehicle.
CAUTION
Do not attempt a combination button/lever down-
shift at too high an engine speed (generally
above 1400 rpm). Doing so could result in dam-
age to the engine, transmission, and/or driveline.
3. Combination button/lever shift—With the throttle
still applied, preselect the next gear by sliding
the shift button forward. Break torque by releas-
ing the throttle and depressing the clutch pedal.
Double-clutch and move the shift lever to the
next desired gear position.
The combination button/lever shift is used for
gear changes from 9th to 8th, 7th to 6th, 5th to
4th, and 3rd to 2nd.
Meritor Range-Shift
Transmissions
Refer to the Meritor website for additional informa-
tion, www.arvinmeritor.com.
General Information, Meritor Range-
Shift
To operate a range-shift transmission, move the shift
lever through all the low gear positions and then acti-
vate a range switch to provide an additional set of
ratios in the high range. Using the same shift lever
positions as in low range, move the shift lever
through each position as before. On some models,
the initial low gear is often used only in low range.
IMPORTANT: Not all lever positions are used in each
range and the shift patterns vary between transmis-
sions. Be sure to read the shift pattern decal on the
dash for the operating instructions for the specific
transmission installed in your vehicle.
9-Speed M and MO Models
Meritor 9-speed transmissions have a 5-speed front
section, and a 2-speed auxiliary section. The low
8.17
gear in the front sections of the "A" and "B" ratio
transmissions is used only as a starting ratio. The
high gear in the front section of the "R" ratio trans-
missions is used only as the top gear. The remaining
gear positions of the above transmissions are used
once in the low range and once in the high range.
See Fig. 8.15 for the shift patterns.
A
5 7
1 3
1
N
2
6 8
2 4
12/14/1999
A. All M and MX
Transmissions
1. High Range
Fig. 8.15, Meritor 9-Speed Transmission Shift Patterns
NOTE: The 3rd/7th and 4th/8th shift positions in
the M and MX (direct ratio) are opposite of the
MO (overdrive ratio) transmissions. The MX-R
ratio transmissions have the 1st/5th shift posi-
tions where low is in the A and B ratio transmis-
sions. The top gear in the MX-R ratio transmis-
sions is called 9th gear.
10-Speed M Models
Meritor 10-speed transmissions have 10 evenly-
spaced forward ratios. Each transmission consists of
a 5-speed front section, and a 2-speed auxiliary sec-
tion. The 10 forward speeds are obtained by twice
using a 5-speed shift pattern: the first time in low
range; the second time in high range. See
for the shift pattern.
Operation, Meritor Range-Shift
Reverse
To drive in reverse, push the range selector lever
down to put the transmission in the low range. Push
the clutch pedal to the bottom of travel so the clutch
brake slows the transmission for initial gear engage-
ment. Holding the clutch pedal at the bottom of
travel, shift into reverse.
B
8
5
1
4
N
6
7
2
3
f261046
B. All MO Transmissions
2. Low Range
Fig. 8.16