Chevrolet Corvette 2013 Owner's Manual page 240

9-28 Driving and Operating
When a requested shift is denied
due to the speed restrictions shown,
the DIC will momentarily show an X
over the gear display and a chime
will sound.
If the vehicle has a HUD, and the
transmission gear does not respond
to a shift change, a chime will sound
and the HUD will momentarily show
an X over the gear display.
Manual Paddle Shift operation is
available for use with Cruise
Control. See Cruise Control on
page 9 42 Cruise Control for more
information.
The vehicle speeds required for
Manual Paddle Shift up-shifts
depend on several vehicle inputs,
which will vary the allowed up-shift
speed by a few km/h (mph).
For vehicles with a 2.56:1 Axle
Ratio (RPO GM8)
Up-shifts to 4 (Fourth) gear
require approximately 35 km/h
(22 mph).
Up-shifts to 5 (Fifth) gear require
approximately 45 km/h (28 mph).
Up-shifts to 6 (Sixth) gear
require approximately 65 km/h
(41 mph).
To prevent damage to the
powertrain, Manual Paddle
downshifts to a lower gear cannot
be done above certain speeds. The
maximum speed allowed for
downshifting of gears 1 (First)
through 4 (Fourth) are:
Into 4 (Fourth) gear over
250 km/h (155 mph).
Into 3 (Third) gear over 188 km/h
(117 mph).
Into 2 (Second) gear over
120 km/h (75 mph).
Into 1 (First) gear over 68 km/h
(42 mph).
For vehicles with a 2.73:1 Axle
Ratio (RPO GU2, Grand Sport
models)
Up-shifts to 4 (Fourth) gear
require approximately 31 km/h
(19 mph).
Up-shifts to 5 (Fifth) gear require
approximately 39 km/h (24 mph).
Up-shifts to 6 (Sixth) gear
require approximately 57 km/h
(35 mph).
To prevent damage to the
powertrain, Manual Paddle
downshifts to a lower gear cannot
be done above certain speeds. The
maximum speed allowed for
downshifting of gears 1 (First)
through 4 (Fourth) are:
Into 4 (Fourth) gear over
234 km/h (145 mph).