DRIVING - Using the Manual - Automatic Button Related tasks For Peterbilt Vehicles of letting the transmission select them automatically. Driver manually selects the start gear and uses the up/downshift request to shift. 2 Using the Manual - Automatic Button NOTE Multiple gear upshifts and downshifts may be allowed when the up/downshift request procedure is performed multi- ple times (Each request equals one gear change request). For Kenworth Vehicles If the driver attempts to select a non-neutral mode without depressing the service brakes the transmission will not shift into gear. The driver must re-select Neutral and depress the service brakes before selecting the desired mode again.
System holds current gear unless otherwise prompted by using up/ downshift request, except for the “Transmission Manual Override” conditions noted below. This button will put the transmission into manual mode. Manual mode will allow the operator to select the gear. See Up or Down Shifting on page 15. To activate, put the gear selector in the D (drive) mode and then depress the M/A button. The instrument cluster will display the corresponding selection. MANUAL Mode MANUAL mode should be used whenever the driver wants to select the shifts instead 18 Y53-1272-1B1 (08/17)