Porsche 928 S 1986 Driver Manual page 55

The shift points given here are theoretical road speeds. There may be certain variations in practice as a result of manu-
facturing tolerances, the temperatures of components and automatic transmission fluid as well as tyre slip.
Downshifts
A) When you drive with gentle pressure on
the accelerator pedal the transmission
shifts down from 4th to 3rd gear at approx.
29 km/h (18 mph), from 3rd to 2nd gear at
approx. 20 km/h (12 mph) and from 2nd to
1st gear at approx. 16 km/h (10 mph).
B) During full throttle acceleration the trans-
mission shifts down from 4th to 3rd gear
at approx. 114 km/h (70 mph) in order to
provide better acceleration or hill climbing
ability on gradients, from 3rd to 2nd gear
at approx. 57 km/h (35 mph) and from 2nd
to 1st gear at approx. 25 km/h (15 mph).
C) If you press the accelerator pedal down
beyond the pressure point to actuate the
electrical switch behind the accelerator
pedal (kick-down) the downshifts take
place at even higher road speeds in order
to provide maximum acceleration. Down-
shift from 4th to 3rd gear takes place at
approx. 180 km/h (112 mph), from 3rd to 2nd
gear at approx. 107 km/h (66 mph) and from
2nd to 1st gear at approx. 40 km/h (25 mph).
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