Differential Flange Seal - Oil Leak From Front

911 (996)

8/99

3639

Binder - Group 3, Manual Trans.

1-20-00

Oil Leak From Front Differential Flange Seal

Vehicle Type:
911 Carrera 4 (996) only

Model Year:
As of 1999 (X)

Concern:
Oil leaking from left half-shaft (axle) flange, front differential.

Information:
The sealing surface of some left halt-shaft flanges (at the radial seal contact area) was not machined to specification and could result in oil leaking at the half-shaft flange seal. As of the production date below, the surface processing procedure of the left half-shaft flange was improved. The improved half-shaft flanges are marked with a white or green paint dot. (The marks are on the side not machined, and are not visible when drive shaft is installed.)

When repairing a front differential oil leak at the left half-shaft flange/seal on vehicles produced prior to the below VINs, the left half-shaft flange should be replaced (with the improved version). The radial seal and snap ring should also be replaced.

Production change as of November 10, 1999, and from VINs:
99 8Y5 62 0545 Carrera 4 Coupe
99 XYS 65 1479 Carrera 4 Cabrio

Parts Information:

Part Number Description

996 332 309 00 Half-shaft flange (only the improved version is available)
999 113 454 40 Shaft radial seal
996 332 311 00 Snap ring

Working Time:
Labor Operation Time Units Description
39 88 19 00 260 TU Removing/installing four wheel drive final drive
39 59 19 50 40 TU Removing/installing seal for flange shaft

Literature:
911 Carrera 4 (996) Technical Manual.
39 88 19 - Removing/installing front final drive
39 59 19 - Removing/installing sealing ring for flanged shaft