350ci engine, Turbo 350 trans?
Shift points controlled by vacuum shift module.
Kickdown=passing gear, above 45mph.
A cable controls the passing gear and is easily adjusted.
Jack & block the rear of the vehicle, foot on the break as you put it in gear, off the break, run it through the gears. Driving normal, the shifts should be second gear, at about 15-18 mph, and third gear at about 28-30 mph. Adjust your kick down cable,(engine off
), to where the cable is pulled all the way when the gas pedal is all the way to the floor. Have someone push it to the floor & hold it there. Adjust the cable to where it is all the way out with just a little slack, if it were pushed to the floor it wouldn't break the cable.
A vacuum module controls shift points and can also be adjusted. Better done at a shop as the module should come off and be cleaned. Although you can remove the vac hose, if any trans fluid comes out time for replacement.