Self Centering CV Joints - Vibration at 110 to 125 MPH

Group
4

Number
9603

Model
6 Cyl.

Part Identifier
4041

February 27, 1996

Subject:
Self Centering CV Joints

ATTENTION:
Service Manager / Service Technician

Models Affected:
911 Carrera 4 Model Year 1995 and 1996
911 Turbo Model Year 1996

Concern:

Some customers may comment of a slight vibration in the vehicle at speeds between 110 mph and 125 mph*. This may be due to incorrect centering of the inner CV joints to the front axle drive flanges.

* Porsche recommends obeying all traffic laws.

General Information:

As of the below-mentioned VIN's, the front differential front drive shafts and axle flanges are self centering. Should replacement of the front drive shaft(s) or axle flange become necessary, only the new self centering style should be used.

New self centering front drive shaft and axle flange installed as of VIN's:

99 1SS 323978
99 3SS 343514
99 0TS 375338

Identification Information:





The new self centering CV joint and axle flange can be identified by a centering lip on the CV joint cap (# 2 arrow) and a recess in the drive flange (# 4 arrow) as shown in the illustration.

The former style CV joint and axle flange has a rounder profile than the self centering version and can be identified by the illustration above.

Repair Information:

If any of the components that make up the front drive shaft need to be replaced, the new version self centering CV joint cover and drive flange must be used.

The new CV joint cover and new axle flange can be used with the old front drive shaft. It is not necessary to replace the complete front drive shaft unless, the outer CV joint or axle shaft is damaged.

The new self centering front drive shaft must only be coupled with the new self centering axle flange.

Repair Literature:

Porsche Workshop Manual 911 Carrera (993), Volume II and Volume IV.

NOTE:
The former version front drive shaft, CV joint cover and axle flange are no longer available. Only the following part numbers are available.

Parts Information:





The above illustration and parts list will assist the Porsche Service Technician in which parts are necessary for repair procedures.