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Bulletin #: 2100

Advanced Technical Information

Part ID: 3734

971 – Rough PDK II Operation during Adaption Phase
Vehicles Affected
Models

Model Year

Model Type

VIN Range

Vehicle-Specific Equipment

Panamera

As of 2017 up to 2021

971 (all 97A model variants)

N/A

N/A

Revision History
Revision

Release Date

Changes

0

January 21, 2021

Original document

Condition
Rough gear changes with unmatched engine and transmission revolutions further characterized by:
•
Brief engine surges in response without full engagement in the transmission
•
Engine temperature approaching or at operating temperature (50 – 100°C)
•
Low vehicle mileage (0 – 200 miles)
•
DME + PDK II programming performed recently, within 200 miles

Technical Background
The aforementioned conditions may result from a transmission that is undergoing adaption. There are numerous
pre-requisite operations for successful operations of the PDKII. Examples of such operations include: touch-
point adaptions; torque-fill timing, frictional coefficient adaption, control-valve mapping adaptions, and pressure
sensor comparison among numerous others. Reprogramming the PDKII necessitates an adaptation.
Therefore, programming should only be conducted when necessary. The following information describes
the operating parameters necessary for key adaptions to occur.

AfterSales

January 21, 2021
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Bulletin #: 2100

Advanced Technical Information

Part ID: 3734

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Service Information
If it is suspected the PDK II requires adaption, then please observe the following conditions during adaption:
•
Touch-point adaption and torque-fill timing

Final Drive Oil Temperature > 45°C and < 110°C

Operation of the transmission from 4th to 8th gear

Ideally, driving is to be completed under constant driving conditions by changing gears between

engine speeds of 1600 – 2000 rpm
•
Frictional Coefficient adaption

Automatic Transmission Fluid (ATF) Temperature > 65°C and < 95°C

These adaptions occur with every upshift conducted under load

Adaptions also occur in Launch Control and the temperature behavior thereof
•
Control-valve mapping adaptions

No temperature range limits.

Occur during every clutch engagement operation
The driving profile most directly determines the driving distance required by the PDK II to adapt successfully.
Following the instructions above coupled with varying driving profiles, will allow the PDK II to adapt within
approximately 125 miles (200 km). Driving only short trips, by which operating temperatures remain low relative to
those referenced above, will significantly increase the distance required for adaption. Furthermore, adaption
attempts should occur over longer distances and launches avoided.
Warranty
As always, please document the case completely in PQIS.
For this repair, please code the “cause” as follows:
Cause location:
37340
“Double clutch transmission”
Cause symptom:
1126
“Jerky gear change”
Use the following troubleshooting labor operation:
03350000
On board diagnostic (Main work) Fault memory read out
03350053
On board diagnostic (Composite) VAL

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Bulletin #: 2100

Advanced Technical Information

Part ID: 3734

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Search Items
PDK II, Transmission, Clunky, Jerks, Gear change, Adaption

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.

©2021 Porsche Cars North America, Inc.

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January 21, 2021
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