Chevrolet Corvette Owner's Manual page 185

184 Driving and Operating
For Vehicles with a 2.73:1 Axle
Ratio (RPO GU2)
Upshifts to 3 (Third) gear require
approximately 24 km/h (15 mph).
Upshifts to 4 (Fourth) gear
require approximately 34 km/h
(21 mph).
Upshifts to 5 (Fifth) gear require
approximately 43 km/h (27 mph).
Upshifts to 6 (Sixth) gear require
approximately 55 km/h (34 mph).
Upshifts to 7 (Seventh) gear
require approximately 64 km/h
(40 mph).
Upshifts to 8 (Eighth) gear
require approximately 82 km/h
(51 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 7 (Seventh) are:
Into 7 (Seventh) gear over
321 km/h (199 mph).
Into 6 (Sixth) gear over 272 km/h
(169 mph).
Into 5 (Fifth) gear over 214 km/h
(133 mph).
Into 4 (Fourth) gear over
161 km/h (100 mph).
Into 3 (Third) gear over
131 km/h (93 mph).
Into 2 (Second) gear over
88 km/h (62 mph).
Into 1 (First) gear over 55 km/h
(39 mph).
If an upshift is not requested as the
engine speed approaches fuel
shutoff rpm, the engine speed will
be limited to protect the engine. See
Rev Counter 0 108.
Gear Shifting Light
The gear shift light illuminates in the
instrument cluster when a gear
upshift is recommended for best fuel
economy or performance,
depending on driver input.