Porsche 928 Workshop Manual page 1125

928 Automatic Transmission/Gears, Valve Body
38
a
Condition:
Strong jolt in downshift from 4th to 3rd gear.
Cause/Correction:
1. Replace seal on release end of B 2
2. Replace brake band piston B 2
3. Pressure element of B 2 has turned; replace pressure
element.
a
Condition:
Jolts when shifting in partial load range.
Cause/Correction:
1. Check adjustment of control pressure cable.
2. Check modulating pressure, adjusting if necessary
3. Check vacuum line and connections for leaks.
Condition:
a
Shaking during upshifts.
Cause/Correction:
Check whether screen restrictor with spring is installed
(see page 38 126).
Printed in Germany VI
I I, 1984
Troubleshooting
38 115