Checking Functioning; Nominal Pressures In Bar As From Model 87 - Porsche 928 Workshop Manual

928 Automatic Transmlsslon. Gears. Shafts
38
Checking functioning
Nomlnal pressures In bar as from Model '87
Test pressure
T
Modulation pressure'
Working pressure
a
.
i
Gearbox type
A 28.12/14/16
4.2 k 0.05
16.0 * 1
I
I
15.8 f 1
1
A 28.18
0.45 at 20 km/h
1.40 1.40 at at 50 50 km/h km/h
2.15 2.15 at at 100 100 km/h km/h
3.10 3.10 at at 150 150 km/h, km/h,
Controller pressure
approx. 0.2 0.17
approx. 1 .l 0.96
I A 28.14/16 A 28.1:
approx. 2.0 1.74
approx. 2.7 2.35
A 28.18
4.4 f 0.05
Measuring conditions
ATF temperature approx. 80X,
Selector lever in position D, driving
speed approx. 140 km/h,
Vacuum line disconnected at the
modulating pressure cell
ATF temperature approx. 80 ~ C,
selector lever in position D, engine
speed 1400 rpm, hand brake
applied and servicebrake actuated,
Test no longer than
5 seconds. Vacuum line dis-
connected at the modulating
pressure cell
Selector level in position D
Vehicle moving in partial-load range
Vacuum line disconnected at the
modulating prssure cell
* Note
If the focal conditions do not permit testing at approx. 140 km/h, measurements are still possible
at approx. 50 kmh.
Funktion pr9fen (ab Mod. '67)
Printed in Germany - XXXI, 1993
36-110a