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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)
.
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)
.
Into 3 (Third) gear over 176 km/h (109 mph)
.
Into 2 (Second) gear over 113 km/h (70 mph)
.
Into 1 (First) gear over 64 km/h (40 mph).
If the driver does not request an upshift as the engine
speed approaches fuel shut off RPM, the engine speed
will be limited to protect the engine. See Tachometer
on
page 4‑32
for more information.
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