Symptom-based workshop manual

Service
206/20 ENU

3965

3

Transmission Symptom - Oil Leaks on Transfer Box: Observe Specified Procedure (SY
206/20)
Model Line:

Cayenne (9YA/9YB)

Model Year:

As of 2018

Concerns:

Transfer box

Symptom:

Oil leaks are found on the vehicle in the area of the hang-on transfer box and at the transition to the
automatic transmission.

Cause:

We have discovered that the location and cause could not always be clearly determined in the dealer
organization when attempting to resolve the complaint “Oil leak”. As a result, some of the repair
measures that were carried out were not always effective.
Oil migration in the area of the automatic transmission and transfer box can result in incorrect diagnoses
when locating oil leaks. For example, the radial shaft seal on the automatic transmission or transfer box
side may leak at the connection point of the automatic transmission and transfer box.
In addition, oil leaks in the area of the automatic transmission can result in escaping oil contaminating the
transfer box, due to the air flow at the vehicle underbody.
Information
In the case of oil leaks in the area of the transfer box, see also  Technical Information 'Transmission
symptom - Oil leaks on automatic transmission: Observe specified procedure (SY 205/20)'.

Remedial
Action:

Find oil leaks and carry out the relevant repair measure.

Preparatory work
Work
Procedure:

Information
•

Oil leaks must be clearly identifiable and reproducible.

•

Engine oil and coolant must have reached operating temperature during a test drive.

1

Document the original complaint condition with meaningful photos.

2

Attach documentation to PQIS line.

3

Clean automatic transmission and transfer box thoroughly.

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4

Spray large areas of the automatic transmission and transfer box with SpotCheck around the
suspected leakage points.

5

Perform a test drive.

6

Locate the oil leak:
•
•

•

The oil leak is located on the transfer box, continue with  Technical Information 'Transmission
symptom - Oil leaks on transfer box'
The oil leak is located on the automatic transmission, continue with  Technical Information
'Transmission symptom - Oil leaks on automatic transmission: Observe specified procedure (SY
205/20)'
The oil leak cannot be clearly identified, continue with  Technical Information 'Oil leaks on
transfer box'.

7

Produce photo documentation of the leakage point located using SpotCheck.

8

Attach documentation to PQIS line.

Oil leaks on the transfer box
Information
Either the radial shaft seal on the automatic transmission or the transfer box may be damaged at the transition from automatic transmission to transfer box.

Information
Oil penetration of the connection point on the transfer box housing (housing cover) can result in incorrect
interpretations.
Check for oil leaks in the area of the input shaft for hang-on transfer box  Oil migration and  Oil leak on
input-shaft radial shaft.
1

Oil leak on transfer box housing with drops forming in the area of the input shaft. The upswinging
motion of the input shaft in the axial direction causes the transmission oil ahead of the radial shaft
seal to surge with strong pressure fluctuations. This can result in an oil leak complaint.
1.1

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In the event of a complain, first check the technical status of the transfer box using the differentiation table:

AfterSales

Symptom-based workshop manual

Service
206/20 ENU

3965

3

Differentiation of measures via hang-on serial numbers
Start of
production as of:

Part No.:

Description of
change:

Start of
production VIN:

All vehicles
as of hang-on
serial number *
265 NVG0023783F

0F2341011F

Swirl-free input shaft
through modified
partly automated
grinding process

WP1AA29Y9KDA05
830
Part No. VTG:
265 NVG0023783F

Start of
production:
12.04.2018
•

If the serial number on the transfer box corresponds to the specified differentiation data
from the table, the entire transfer box must be replaced, see  Technical Information
'Replacing transfer box'. Replacing the radial shaft seal alone would not be effective in
the long term and the radial shaft seal would leak again.

•

However, if the serial number corresponds to a newer version than that in the differentiation list, only the radial shaft seal may then be replaced, see  Technical Information
'Replacing sealing ring for transfer box (front transmission side)'. The hardware version
of the transfer box corresponds to the latest technical status.

Information
If the repair history of the vehicle indicates that the radial shaft seal was already replaced in
the past, a PRMS ticket must be created before carrying out repairs in order to coordinate
the relevant repair with Technical Support.
1.2

If the radial shaft seal on the automatic transmission is damaged, see  Technical Information 'Complaint - Oil leaks on automatic transmission: Observe specified procedure
(205/20)'.

Oil migration

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Symptom-based workshop manual

Oil leak on input-shaft radial shaft
2

Oil leaks in the area of the output shaft to the rear axle  Oil leak on output-shaft radial shaft seal.
If the output-shaft radial shaft seal is damaged, see  Technical Information 'Replacing sealing ring
for transfer box (rear transmission side)'.

Oil leak on output-shaft radial shaft seal

Replacing transfer box
Work Procedure: 1

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Check permitted combinations of transfer box/automatic transmission, see Technical Information 'Spare parts requirements - (hang-on) transfer box/automatic transmission: Observe
permitted combinations (22/19)'.

2

Replace transfer box, see Workshop Manual '396519 Removing and installing transfer box'.

3

Check and top up oil for transfer box, see Workshop Manual '399035 Checking and topping up
oil for transfer box'.

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Symptom-based workshop manual
Parts Info:

Service
206/20 ENU

3965

3

Parts required:
Part No.

Designation
– Location

Qty.

0F2341011x 1)

 Transfer box

1 ea.

N 91239302

 Bi-hexagonal flange screw
– Input shaft

6 ea.

PAF107722

 Hose clamp
– Rear cardan shaft

1 ea.

PAF107599

 Cheese head bolt with multiple-tooth head
– Rear cardan shaft

6 ea.

95534919121

 Plate
– Rear Cardan shaft

3 ea.

PAF00072900

 Hexagon socket head bolt
– Front underbody cover

3 ea.

95530111501

 Screw plug
– Checking and topping up oil for transfer box

1 ea.

1) Part number varies depending on transmission type

Additional parts required (V6 monoturbo):
Part No.

Designation
– Location

Qty.

PAB25311520

 Seal
– Primary catalytic converter

1 ea.

or
PAB253115

 Seal
– Particle filter

2 ea.

N 91130802

 Hexagon collar nut, self-locking
– Primary catalytic converter

3 ea.

or
N 91130802

 Hexagon collar nut, self-locking
– Particle filter

6 ea.

N 10518405 1)

 Cheese head bolt with multiple-tooth head
– Universal joint

1 ea.

1) Only for vehicles with particle filter

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Additional parts required (V6 and V8 biturbo):

Materials:

Part No.

Designation
– Location

Qty.

PAB25311500

 Seal
– Primary catalytic converter/particle filter

2 ea.

N 91130802

 Hexagon collar nut, self-locking
– Primary catalytic converter/particle filter

6 ea.

Required materials (usually already available at the Porsche dealer):
Part No.
00004321030
00004330563

Invoicing:

Designation
– Use
 Lubricating grease
– Transfer box
 Transfer box oil
– Checking and topping up oil for transfer box

1) approx.

2 grams/ 0.07 oz required per vehicle.

2) approx.

0.1 liter/ 3.38 fl oz required per vehicle.

Qty.
20 gram/ 0.7 oz tube
1)

20 liter/ 5.28 gal
container 2)

For documentation and warranty invoicing, enter the labor operations, PQIS coding and relevant part
numbers specified below in the warranty claim:
I No.

APOS

Labor operation

39650140

Checking transfer box

39651950

Removing and installing transfer box

39903556

Checking and topping up oil for transfer box
PQIS coding:

Location (FES5)

39650

Transfer box

Damage type (SA4)

5043

Oil loss

References:

 Workshop Manual '396519 Removing and installing transfer box'
 Workshop Manual '399035 Checking and topping up oil for transfer box'
 Technical Information '399035 Spare parts requirements for (hang-on) transfer box/automatic transmission: Observe permitted combinations (22/19)'

 Technical Information '399035 Transmission symptom - Oil leaks on automatic transmission: Observe
specified procedure (SY 205/20)'

Mar 1, 2021
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AfterSales

Symptom-based workshop manual

Service
206/20 ENU

3965

3

Replacing radial shaft seal on input shaft
Work Procedure: 1