Porsche 928 Workshop Manual page 808

928 Automatic Transmission / Gear, Valve Body
38
Condition
ATF lost between torque converter and primary
pump
Correction: 1. Install and tighten drain plug for torque converter, using a
new seal. Coat threads with Hyiorna. If still leaking ATF,
continue with points 2 and 3.
2. Replace radial seal and O-ring of primary pump. checking
O-ring groove in primary pump for porous spots. Heplace
primary pump, ifs nccrssary.
3. Apply a good coat of iiyloma tn threads of hottom
mounting bolts.
Condition: Oil leak behind starter interlock and backup
light switch
Coircction:
Replace O-ring on pressure part li 2.
Condition:
2nd gear
loud
Correction: Replace rear planet gear set.
Condition Whining noise only when changing gears with
full load
C:orrrction:
Replace: oil filter
c:undition Whining noise. which
increases
in loudness as
engine spvcd rises
Correction: Check primary pump. replacing if necessary
Printed in Germany I, 197~
Troubleshooting
(8 19