No. 132-17

Symptom-based workshop manual
Service
132/17 ENU
3965
3
Customer Complaint - Vibration/Jerking During Acceleration: Checking Transfer Gear (SY
132/17)
Revision:
This bulletin replaces bulletin Group 3 132/17, dated February 5, 2018.
Model Year:
As of 2014 up to 2018
Model Line:
Macan
Information:
Information
•
Currently, the Porsche Doppelkupplung (PDK) is increasingly being replaced together with
the transfer case.
•
When checked by the supplier, the Porsche Doppelkupplung (PDK) is found to be "OK". It was
mainly only the transfer case that was defective.
 Before doing any other work, the following test steps and procedures must be observed.
Information
The "transfer case" is designed as an active all-wheel drive system that is dynamically adapted to the
respective driving state.
Power transmission between the front and rear axle is controlled electronically via the "all-wheel
drive servo motor (transfer case)" and the multi-plate clutches integrated in the transfer case.
 On all-wheel drive vehicles, the drive train can become strained at low speeds and when the
steering is turned sharply when "Off-road mode" is activated, depending on design.
•
Under extreme conditions, the drive train can also become strained when "Off-road mode" is
deactivated.
•
Customers with little experience with all-wheel drive vehicles can interpret this behavior as a
fault, which in turn can result in incorrect diagnoses in the workshop.
Action required: Customer complaint to be checked:
•
•
•
Rough-running engine or
the vehicle vibrates or
the engine jerks under load/during acceleration.
NOTICE
Driving with connectors on chassis components or control units disconnected.
•
Bearings in transfer case can be damaged.

Drive vehicle only at a maximum speed of 30 mph (50 km/h).
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Service
3965
ENU
Symptom-based workshop manual
132/17

Do not drive vehicle in the upper load range or at full throttle.

During Diagnosis of a vibration, a defective front axle shaft can cause a vibration and is masked when the
Transfer case is disconnected as torque is no longer applied to the front drive system in the same manner.
1
Carry out the test procedure under the following conditions:
•
•
•
On a straight stretch
from speeds less than 10 mph (20 km/h)
accelerate the vehicle in the partial load range.
During this test procedure, if:
•
•
jerking can be felt, the test procedure under  (below) must also be carried out in order to
determine the exact cause.
no jerking is felt, see the information below about normal vehicle behavior:
Information
The "transfer case" is designed as an active all-wheel drive system that is dynamically adapted to the
respective driving state.
Power transmission between the front and rear axle is controlled electronically via the "all-wheel
drive servo motor (transfer case)" and the multi-plate clutches integrated in the transfer case.
 On all-wheel drive vehicles, the drive train can become strained at low speeds and when the
steering is turned sharply when "Off-road mode" is activated, depending on design.
•
Under extreme conditions, the drive train can also become strained when "Off-road mode" is
deactivated.
•
Customers with little experience with all-wheel drive vehicles can interpret this behavior as a
fault, which in turn can result in incorrect diagnoses in the workshop.
2
Disconnectconnector on center differential lock (plug connection on transfer gear servo
motor).
2.1
Carry out the test procedure under the following conditions:
•
•
•
2.2
On a straight stretch
from speeds less than 10 mph (20 km/h)
accelerate the vehicle in the partial load range.
Re-connect connector on center differential lock.
 If the problem is no longer present (when the connector on the center differential lock
is disconnected),
the hang-on transfer gear must be replaced, see  Workshop Manual '396555 Replacing
transfer box' Re-program all-wheel drive control unit
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Service
Symptom-based workshop manual
132/17 ENU
3965
3
Information
The Porsche Doppelkupplung (PDK) is thus reliably ruled out as the component
responsible for causing the problem and must not be replaced together with the
transfer case.
 If the problem is still present (when the connector on the center differential lock
is disconnected), try to find the cause of the problem in the double clutch transmission or drive train area.
End of remedial action.
Invoicing:
The work involved is invoiced under the labor operation:
APOS
Labor operation
39655550
Replacing transfer case
References:
I No.
 Workshop Manual '396555 Replacing transfer box'
Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training
courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special
tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the
safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and
safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a
discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed.
© 2022 Porsche Cars North America, Inc.
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