2010 Acura TL Owner's Manual - Page 479

Driving with the Paddle Shifters (Automatic Transmission Only) The transmission remains in the selected gear (5, 4, 3, 2, or 1). There is no automatic downshift when you push the accelerator pedal to the floor. When you are driving in 4th or 5th gear, the transmission downshifts to the lower gear under the following conditions: The vehicle slows down to a certain speed. You press the brake pedal. Downshifting with the paddle shifter allows you to increase the engine braking when going down steep or long hills, and provides more power when climbing uphills. You can upshift the transmission manually to reduce the rpm. The transmission also shifts automatically as the vehicle comes to a complete stop. It downshifts to first gear when the vehicle speed reaches 9 mph (15 km/h) or less. The automatic transmission will not allow you to shift up or down if: You downshift before the engine speed reaches the highest threshold of the lower gear. If you try to do this, the gear position indicator will flash the number of the lower gear several times, then return to a higher gear. If the vehicle speed decreases below the redline of the selected lower gear while the indicator is flashing, the transmission downshifts, and the indicator displays the selected gear. You upshift before the engine speed reaches the lowest threshold of the higher gear. You pull both paddle shifters at the same time. 476 2010 TL