This video explains the Allison transmission's push button shift selector. Once the ignition is on, the digital display shows the highest available forward range, the current range and the active status of the prognostic system. It also indicates when the transmission is in neutral. The selector includes buttons for reverse, neutral and drive, with a tactile ridge on the neutral button for easy identification. Upshift and downshift arrows allow for manual adjustment of the transmission range. The mode button enables alternative shift schedules like economy or performance and facilitates toggling and clearing of diagnostic trouble codes. The system typically alternates between a primary and a secondary shift schedule based on driving needs.
