Eaton Fuller Straight-Shift Transmissions; Operation, Straight-Shift - freightliner BUSINESS CLASS M2 Driver Manual

Digital Display
The dual digital display shows both the selected
range (SELECT) and actual range attained (MONI-
TOR). The single digital display shows the selected
range.
Oil Level Sensor
Allison MD Series transmissions have an electronic
oil level sensor to read fluid level information. The
fluid level diagnostic will display whether the oil level
is OK, too low, or too high. It will also display a de-
fault code and indicate if the preconditions (of receiv-
ing the fluid level information) are not met.
IMPORTANT: Maintain the the proper fluid level
at all times. If the fluid level is too low, the con-
verter and clutch do not receive an adequate
supply of fluid. If the level is too high, the trans-
mission may shift erratically or overheat.
To access the oil level display mode, park the vehicle
on a level surface, shift to N (Neutral), apply the
parking brake, and idle the engine. Then simulta-
neously press both the up and down arrows once.
The oil level will display at the end of a two-minute
countdown.
Diagnostic Codes
Diagnostic codes are numerical indications relating to
a malfunction in transmission operation. These codes
are logged in the TCM/ECU memory. The most se-
vere or most recent code is listed first. A maximum of
five codes (numbered d1-d5) may be listed in
memory at one time. If the mode indicator LED is
illuminated, the displayed code is active. If it is not
illuminated, the displayed code is not active.
NOTE: During normal operation, an illuminated
mode indicator LED signifies the specialized
mode operation is in use.
To enter diagnostics mode, first park the vehicle and
apply the parking brake. Then simultaneously press
both the up and down arrows twice.
® ®
Eaton Fuller
Transmissions
Refer to the Eaton website for additional information,
www.roadranger.com.
Straight-Shift
General Information, Straight-Shift
Eaton Fuller 5-speed FS models are fully synchro-
nized. They have five forward speeds and one re-
verse. See Fig. 8.3 for the shift pattern.
R
1
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Fig. 8.3, Shift Pattern, 5-Speed FS Models
Eaton Fuller 6-speed FS and FSO models are fully
synchronized. They have six forward speeds and one
reverse. See Fig. 8.4 for the shift pattern.
R 1
N
2
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Fig. 8.4, Shift Pattern, 6-Speed FS and FSO Models
Eaton Fuller 7-speed T models are not synchronized.
They have seven forward speeds and one reverse.
See Fig. 8.5 for the shift pattern.
These transmissions are designed for use with on-
highway, fuel economy engines where a minimum of
shifting is desired and less gear reduction is accept-
able.

Operation, Straight-Shift

1. Always use first gear when starting to move the
vehicle forward.
IMPORTANT: Do not rest your foot on the clutch
pedal while driving. This causes partial clutch
Drivetrain
2 4
N
3 5
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3 5
4 6
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8.8