Porsche 928 Problem Report
Porsche 928 PSD locking system light due to wear in the multi-disc clutch
Due to wear in the differential multi-disc clutch, the PSD (Porsche Slip Differential) locking system light may illuminate. The independent hydraulic fluid supply for the PSD needs to be maintained properly, including the filling/replacement of fluid before problems develop.
Mechanical wear in the clutch and clutch release mechanism can cause shifting engagement and no...