A method for variable operation of a vehicle transmission using rough road
sensing includes defining a first set of parameters to calibrate the
vehicle transmission for a smooth road condition and a second set of
parameters to calibrate the vehicle transmission for a rough road
condition. The method includes sensing a road condition, generating a
road condition signal corresponding to the road condition, and measuring
a magnitude of the road condition signal. The method includes switching
from the first set of parameters to the second set of parameters to
operate the vehicle transmission when the magnitude of the road condition
signal exceeds a first predetermined threshold. The method includes
switching from the second set of parameters to the first set of
parameters to operate the vehicle transmission when the magnitude of the
road condition signal is less than a second predetermined threshold that
is different than the first predetermined threshold.