A method of automatically matching engine speed to vehicle speed while a
manual transmission is shifted. The currently selected speed ratio is
determined from the ratio of engine speed and vehicle speed. The operator
initiates a shift by disengaging the clutch. The operator's throttle
inputs before and after clutch disengagement imply whether he wishes an
upshift of one speed ratio or a downshift of one or two speed ratios.
While the clutch is disengaged, the engine computer acts to bring the
engine to the speed needed for smooth reengagement of the clutch. Engine
speed control returns to the operator upon clutch engagement.