Transmission Controls
If so equipped, the transmission range control valve and splitter valve are attached to the gearshift knob. Transmission shift pattern labels are located inside the cab. See Meritor MTC Series for complete transmission operating instructions.
On vehicles with standard Allison On-Highway Series automatic transmission, the shift selector is lever-activated. The display mounted on the steering column provides four forward ranges and one reverse range. See Fig..
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All Series, Standard (without park)
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1000/2400 Series, Optional (with park)
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2000 Series, Optional (with auto-apply parking brake)
Fig. 1, Steering Column-Mounted Shift Controls
When the transmission is in D (drive), the vehicle will operate in the overdrive (5th) gear. To shift down into the direct drive (4th) gear, use the overdrive lockout switch (O/D legend). See Fig.. The transmission will shift into 4th gear and remain in that gear unless a range inhibitor is active, such as engine overspeed. See Meritor MTC Series for more information about range inhibitors.
Fig. 2, Overdrive Lockout Switch
To shift to fourth gear, press on the upper part of the rocker (at the LED). The LED will come on and stay illuminated until the bottom part of the rocker switch is pressed.
On vehicles with Allison MD Series automatic transmission or Eaton Autoshift automated transmission, a push-button shift selector provides four, five, or six forward ranges and one reverse range. See Meritor MTC Series for more information about the push-button shift selector.