General Information

rv dm 08.02.002

2500, 3000, and 4000 MH series automatic transmissions have six forward speeds and one Reverse (R) speed. These transmissions have electronic shift controls that can be programmed to allow the use of different numbers of geared speeds. See Fig.. For instance the transmission can be programmed to operate as a 4-speed, 5-speed, or 6-speed unit in the "primary" shift mode. If needed, a "secondary" shift mode can be programmed to provide another shift configuration to optimize vehicle use under different operating conditions. To activate a secondary shift mode, or other special function programmed into the electronic control unit (ECU), depress the Mode button. A label just above the Mode button identifies the special function.

Note:  The number displayed in the Digital Display window is the highest forward range available in the selected position. Visually check to confirm the range selected. If the display is flashing, the shift is inhibited.

  1. Drive (D) Button

  2. Neutral (N) Button

  3. Reverse (R) Button

  4. Select Display

  5. Select/Monitor Display Window

  6. Monitor Display

  7. Service Display

  8. Mode Button

  9. Upshift Button

  10. Downshift Button

Fig. 1, GEN IV Shift Selector

The 3000 and 4000 MH series transmission systems are designed to warn the driver of transmission malfunctions. The driver of a vehicle equipped with these transmissions should know the extent of the warning system in order to safely operate the vehicle. See General Description for information on the warning system.

Note:
Parent topic: 2500/3000/4000 MH Models
Document Number: 0000107944
Manual Publication Date: 2024-05-03
Topic Publication Date: 2024-05-03