Porsche 911 TURBO - 1975 WORSHOP, Manual

Page: 146 / 252

146
Shifting Gears
Shifting gears on the steering wheel
With the rocker switches on the steering wheel,
you can change temporarily from automatic
selection mode D to manual mode M .
For example:
– Shifting down before bends and on entering
built-up areas.
– Shifting down on downward slopes (engine
braking).
– Shifting down for brief spurts of acceleration.
– Selecting 1st gear for moving off.
Manual selection mode remains engaged:
– for cornering (depending on the lateral
acceleration) and overrunning,
– when the vehicle is stationary
(e.g. at a junction).
The system leaves manual selection mode:
– automatically after approx. 8 seconds
(unless cornering or overrunning),
– if you depress the accelerator to kickdown,
– after moving off.
Temporary change-down
Conditions:
Speed is higher than approx. 54 km/h (33 mph).
f
Rapid acceleration.
The Tiptronic changes temporarily to the
sportiest gear-changing map, i.e. to the
highest possible gear-changing points.
Correspondingly, the transmission shifts down
immediately by one or two gears.
Ending the function:
f
Release the accelerator markedly
(by approx. 25 %).
Kickdown
The kickdown function is active in selector lever
position D , even if you temporarily change to
manual mode
M
using the rocker switches on the
steering wheel.
f For optimum acceleration, e.g. when
overtaking, depress the accelerator pedal
beyond the full-throttle point (kickdown).
The transmission shifts down depending on the
speed of travel and engine speed.
Upward shifts occur at the highest possible engine
speeds.
These gear-changing speeds remain active until
the accelerator is released to approx. 80 % of the
full-throttle position.
M - Manual selection mode
The currently selected gear is retained when you
change from D to M .
If you change from
M
to
D
, the gear-changing map
suitable for your current driving style is selected
and the appropriate gear is selected.
Kickdown downshifts are not active in
selector position “M”.
Therefore, when accelerating (e.g. to
overtake), you must change down manually.
Two rocker switches in the upper steering-wheel
spokes let you comfortably and reliably select the
five forward gears.