Porsche 928 Workshop Manual page 801

38
Automatic Transmission / Gears, Valve Body
928
Condition:
1st gear slips
Correction:
1. Check easy movement of cuntrul valve 8 1. replacing
shift valve housing if necessary.
2. Remove and install brake band piston B 1. check seal
and replace if necessary.
3. Replace brake band B 1 and pressure part for tl 1. Check
easy movement of vent valves in support flange K 1.
replacing support flange if necessary.
Condition: Transmission slips during Ist/Znd shift or in
2nd and 3rd gear
Correction: 1. Check modulating and operating pressures. adjusting if
necessary.
2. Replace shift valve housing, also replacing sealing bushings
on plug tubes.
3. Repair clutches K 1 and K 2 depending on findings. Visually
inspect oil distribution sleeve, replacing if necessary.
Condition:
Transmission slips in 3rd gear
Correction: 1. Remove shift valve housing, check sealing bushings on plug
tubes and replace same if necessary.
2, Repair clutch K 2 depending on findings. Visually inspect
oil distribution sleeve, replacing if necessary.
38 - 12 Troubleshooting Printed in Germany