This part has been discontinued, but may be available from distributor inventory.
The A4LD is designed so the overdrive shaft is supported at its tip by the output shaft. The support is not adequate enough to prevent vibration of the overdrive shaft. Often, the lack of support for the overdrive shaft allows the overdrive sprag to contact the overrun clutch retainer, causing the retainer springs to blow out. Even if contact does not occur, vibration of the overdrive shaft is transferred to the forward clutch drum and causes increased wear between the forward clutch sealing rings and the center support. Eventually the wear leads to leakage of forward clutch oil. To correct the situation Sonnax has introduced a sleeve 56219-05K.