Manual Mode Shifting Operation

Electronic Range Select (ERS) Mode 

ERS or manual mode allows you to choose the top-gear limit of the transmission and the vehicle's speed while driving downhill or towing a trailer. The vehicle has an electronic shift position indicator within the instrument cluster. When using the ERS mode a number will display next to the L, indicating the current gear that has been selected.

To use this feature:

1. Transmission Range - L.
2. Press the Plus (+) or Minus (-) to increase or decrease the gear range available.

When you shift from Drive (D) to Low (L), the transmission will shift to a pre-determined lower gear range. The highest gear range available for this pre-determined range is displayed next to L in Driver Information Center (DIC). The number displayed in the DIC is the highest gear that the transmission will be allowed to operate in. This means that all gears below that number are available. For example when fourth (4) is shown next to the L, first (1) through 4 gears are automatically shifted by the vehicle. The transmission will not shift into fifth (5) until the plus (+) is used or you shift back into Drive (D).

While in Low (L), the transmission will prevent shifting to a lower gear range if the engine speed is too high. You have a brief period of time to slow the vehicle. If vehicle speed is not reduced within the time allowed, the lower gear range shift will not be completed. You must further slow the vehicle, then press the minus (-) button to the desired lower gear range.

In manual mode, the K71 Transmission Control Module will always have final authority of when to allow an upshift or downshift. The upshift or downshift into the appropriate gear is based on engine RPM, vehicle speed and other control parameters. The transmission will not automatically downshift to the next lower gear if it would cause an engine over speed condition or upshift to a higher if it would result in too low of engine RPM.