Honda 2007 RDX Owner's Manual page 308

Driving with the Paddle Shifters
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. Driving in the
higher gear helps fuel economy.
The transmission also shifts
automatically as the vehicle comes to
a complete stop. It downshifts to first
gear when the vehicle speed reaches
6 mph (10 km/h) or less.
The automatic transmission will not
allow you to change shift if:
You downshift before the engine
speed reaches the upper limit 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.
302
You upshift before the engine
speed reaches the lower limit of
the higher gear.
You try to shift to third or a higher
gear when the vehicle is stationary.
You press both paddle shifters at
the same time.
You press one of the two paddle
shifters with another paddle
shifter being pressed.
Here are the speed ranges for
upshifting and downshifting.
To shift Speed range
from
1 2 over 0 mph (0 km/h)
2 3 over 8 mph (13 km/h)
3 4 over 17 mph (27 km/h)
4 5 over 47 mph (75 km/h)
To shift Speed range
from
2 1 under 29 mph (47 km/h)
3 2 under 63 mph (100 km/h)
4 3 under 94 mph (150 km/h)
5 4 under 114 mph (182 km/h)