Vibration & Possible Judder Concern on Turns Under Acceleration – 2019-2022 Subaru

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Bulletin Number: 16-136-22R; Revised: 06/13/23 Page 1 of 8
SERVICE BULLETIN
Continued…
CAUTION: VEHICLE SERVICING PERFORMED BY UNTRAINED PERSONS COULD
RESULT IN SERIOUS INJURY TO THOSE PERSONS OR TO OTHERS.
Subaru Service Bulletins are intended for use by professional technicians ONLY. They
are written to inform those technicians of conditions that may occur in some vehicles,
or to provide information that could assist in the proper servicing of the vehicle. Properly
trained technicians have the equipment, tools, safety instructions, and know-how to
do the job correctly and safely. If a condition is described, DO NOT assume that this
Service Bulletin applies to your vehicle, or that your vehicle will have that condition.
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NUMBER: 16-136-22R
DATE: 01/20/22
REVISED: 06/13/23
APPLICABILITY: 2019-22MY Ascent
2020-22MY Legacy & Outback 2.4L Turbo
SUBJECT: Vibration & Possible Judder Concern on Turns
Under Acceleration
INTRODUCTION:
This service bulletin provides a temporary repair procedure to address vibrations and/or judder
concerns experienced on turns during acceleration. If either of these conditions are verified, follow
the confirmation process outlined below. If confirmed and until further notice, the multiple plate
transfer (MPT) clutch will require replacement. A revised repair procedure will be introduced at a
later date.
PART INFORMATION:
IMPORTANT NOTE:
There is a specified sequence of
assembly for the Driven Plates (19)
and the Drive Plates (20).
ATTENTION:
GENERAL MANAGER q
PARTS MANAGER q
CLAIMS PERSONNEL q
SERVICE MANAGER q
IMPORTANT – All
Service Personnel
Should Read and
Initial in the boxes
provided, right.
©2022 Subaru of America, Inc. All rights reserved.
Bulletin Number: 16-136-22R; Revised: 06/13/23 Page 2 of 8
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IMPORTANT NOTE:
As per the applicable Subaru Service
Manual, assembly of the Plates
must start with the external toothed
Driven Plates (19) and then alternately
assembled with the internally
toothed Drive Plates (20).
IMPORTANT NOTES:
• Always order the most up-to-date replacement parts based on the specific VIN being repaired.
• Part quantities indicated with a (*) in the information below MUST be ordered with the
correct thickness. Refer to the applicable Service Manual for details on thrust bearing
thickness confirmation.
LEGACY & OUTBACK ASCENT & OUTBACK WILDERNESS
Part Description Part Number Qty Part Description Part Number Qty
CLUTCH ASSY-TRF 33119AA740 1 CLUTCH ASSY-TRF 33119AA720 1
THRUST BEARING
806536020
806535030
806535040
806535050
806535060
806535070
806535090
1* THRUST BEARING
806536020
806535030
806535040
806535050
806535060
806535070
806535090
1*
GASKET 803916010 1 GASKET 803916010 1
GASKET 803918060 1 GASKET 803918060 1
RING-SEAL 31377AA490 3 RING-SEAL 31377AA490 3
High Torque CVT-LV (As Needed) High Torque CVT-LV (As Needed)
Model Transmission Fluid Part Number Quantity/Unit/Pack Warranty Part #
ALL High Torque CVTF-LV
SOA748V0300 5 Gallon Pail
SOA635312
SOA748V0310 16-Gallon Keg
Bulletin Number: 16-136-22R; Revised: 06/13/23 Page 3 of 8
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SERVICE PROCEDURE / INFORMATION:
Procedure Overview Flowchart:
Bulletin Number: 16-136-22R; Revised: 06/13/23 Page 4 of 8
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Detailed Diagnosis Procedure:
IMPORTANT NOTE: Before applying this bulletin, confirm the WRK-21/22 recall has been
completed if applicable.
STEP 1: Using Subaru Select Monitor (SSM), observe the selected data items listed in the table
below. Road test and confirm if the symptom can be duplicated under the suggested conditions as
listed.
CAUTION: It is highly recommended for TWO people to perform this procedure; one to observe
SSM data while the other drives the vehicle.
Selected Data Items Conditions
CVT oil pan temperature Bellow 176 Deg F
Acceleration opening angle 10% to 30%
Steering angle FULL Steer
Vehicle speed Under 20mph
IMPORTANT NOTE: Always save the recorded data in Subaru Select Monitor.
STEP 2: Can the symptom be duplicated under the conditions described above?
YES – Proceed to STEP 3.
NO – Verify the customer’s exact complaint and continue diagnosis.
STEP 3: Using the SSM, select “Work Support” within the “Transmission” menu. Select “AWD
ON/OFF Switching Mode” and switch to front wheel drive mode. Road test again in this mode and
attempt to duplicate the described symptom.
STEP 4: Can the symptom be duplicated while operating in front wheel drive mode?
YES – Continue diagnosis and repair the cause.
NO – Proceed to STEP 5
CRITICAL: In a case when WRK21/22 has NOT been performed when applicable, perform the
WRK-21/22 procedure. In a case when WRK21/22 is not applicable, proceed to STEP 5.
STEP 5: Reprogram the TCM following the normal FlashWrite procedure. AT Learning procedure in
NOT required after reprogramming has been performed.
Subaru of America, Inc. (SOA) highly recommends connecting either the Subaru Midtronics DCA-
8000 Dynamic Diagnostic Charging System or the Subaru Midtronics GR8-100 Diagnostic Battery
Charger to the vehicle and utilizing the Power Supply Mode feature to supply a stable 13.5 volts
anytime a vehicle control module is being reprogrammed.
Bulletin Number: 16-136-22R; Revised: 06/13/23 Page 5 of 8
Once the Midtronics charger is connected to the vehicle, if the battery is fully charged, it takes less
than three (3) minutes to boot-up the charger, select the Power Supply Mode, and have the battery
voltage stabilized and ready for reprogramming.
NOTES:
• For instructions on using the power supply mode, reference the applicable User Manual for the
Midtronics DCA-8000 Dynamic Diagnostic Charging System and the Midtronics GR8-1100
Diagnostic Battery Charger on STIS.
• Confirm all electrical loads such as lights, audio, HVAC, seat heaters, and rear defroster are all
switched OFF before setting up the charger for Power Supply Mode.
• Select the correct battery type (Flooded, EFB, Gel, AGM or AGM Spiral).
• Input the CCA which matches the vehicle’s battery. NOTE: OE and replacement batteries have
different CCA ratings. Always confirm the battery’s CCA rating before proceeding.
• If using a DCA-8000 Dynamic Diagnostic Charging System, set the power supply voltage to
13.5 volts.
• DO NOT connect the DST-i or SDI until the Power Supply mode function has completed its
battery test mode and the Charging Voltage has dropped to and shows a steady 13.5 Volts on the
display.
• Once Power Supply Mode reaches a steady 13.5 volts, connect the DST-i or SDI to the OBD
connector and proceed with initiating the normal FlashWrite reprogramming process.
• Amperage will fluctuate based upon the vehicle’s demand for power. NOTE: If the voltage rises
beyond 14V while programming is in process, the procedure will abort. This can indicate a need
to test or charge the vehicle battery before any further attempt at programming is made.
VERY IMPORTANT:
This information is applicable to the Subaru Midtronics DCA-8000 Dynamic Diagnostic Charging
System and the Subaru Midtronics GR8-1100 Diagnostic Battery Charger ONLY. It does not apply
to any other brand / type of “generic” battery charger whatsoever. ONLY the DCA-8000 and the
GR8-1100 and their Power Supply Mode feature have been tested and approved by SOA.
REMINDER: If the DCA-8000 or GR8-1100 indicates the vehicle’s battery must be charged, charge
it fully using the DCA-8000 or GR8-1100 before proceeding to reprogram the vehicle using the
Power Supply Mode.
NOTE: Control module failures resulting from battery discharge during reprogramming are not a
matter for warranty. Should any DTCs reset after the reprogramming update is performed, diagnose
per the procedure outlined in the applicable Service Manual.
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Bulletin Number: 16-136-22R; Revised: 06/13/23 Page 6 of 8
PAK File Information:
All reprogramming files are to be included in Sept 2022 SSM4 software. Confirm the WRK-21/22
recall has been completed if applicable.
NOTE: AT learning procedure is NOT required after reprogramming is complete.
Model Year Vehicle File name Specification
Old Part
Number
Decryption
Keyword
New CID
19 ASCENT 30919AF98G.pak
2.4L DIT CVT
without CVTF cooler
(air cool)
30919AF98E
30919AF98F
6CB17BE5 R83EE000
19 ASCENT 30919AF99G.pak
2.4L DIT CVT with
CVTF cooler
(air cool)
30919AF99E
30919AF99F
1648933C R83EF000
20-21 ASCENT 30919AH13H.pk2
2.4L DIT CVT
without CVTF cooler
(air cool)
30919AH13F
30919AH13G
B3DFD2E3 Q93EE100
20-21 ASCENT 30919AH14H.pk2
2.4L DIT CVT with
CVTF cooler
(air cool)
30919AH14E*
30919AH14G
B5D0FB3D Q93EF100
22 ASCENT 30919AJ53B.pk2
2.4L DIT CVT
without CVTF cooler
(air cool)
30919AJ53A D3DF9A7B N2FEE600
22 ASCENT 30919AJ54B.pk2
2.4L DIT CVT with
CVTF cooler
(air cool)
30919AJ54A CED94BB7 N2FEF600
20-21 OUTBACK 30919AG76D.pk2
2.4L DIT
CVT
30919AG76C C084BD9F C7FEF840
20-21 LEGACY 30919AG75D.pk2
2.4L DIT
CVT
30919AG75C F7DE7793 C7FEC840
22 LEGACY 30919AJ48B.pk2
2.4L DIT
CVT
30919AJ48A 306A9BDE A9FEC640
22 OUTBACK 30919AJ49B.pk2
2.4L DIT
CVT
30919AJ49A D40C8A85 A9FEF640
22
OUTBACK
Wilderness
30919AJ11C.pk2
2.4L DIT
CVT
30919AJ11A
30919AJ11B
11D79226 A98EF730
* A TCM with software version 30919AH14E as the current software status will require an additional
step when reprograming. Until further revision is announced, the Temporary PAK file used in WRK-
21/22 MUST be reprogrammed to the TCM before the 30919AH14G file can be installed.
NOTE: The temporary reprogramming files used in WRK-21/22 are not to be used for CVT chain
slip diagnosis on vehicles currently unaffected by WRK-21/22.
After reprogramming is successful proceed to STEP 6.
Bulletin Number: 16-136-22R; Revised: 06/13/23 Page 7 of 8
STEP 6: Replace ALL of the applicable parts outlined in the Part Information section of this bulletin.
The service procedures for transfer clutch disassembly, assembly, and adjustment remain unchanged.
Always refer to the applicable Service Manual and review the full requirements of the repair being
performed. The Service Manual procedures contain information critical to performing an effective
repair the first time, every time. This includes but is not limited to important SAFETY precautions,
proper inspection criteria, necessary special tools, required processes and related one-time-use parts
needed for a complete and lasting repair.
Refer to STIS: Transmission/Transaxle > Transfer Clutch > REMOVAL, INSPECTION,
DISASSEMBLY, ASSEMBLY, & ADJUSTMENT.
IMPORTANT NOTES:
• The CVT should be in the Neutral position when installing the park rod arm and the tail
housing. With the vehicle in Neutral, the park arm is relaxed. The vehicle in park, the arm
wants to lock into the plate/ gear and pawl arm is pushing up.
• The Service Manual uses a black star () in the component breakdown illustration to
indicate one-time use parts
• Refer to the applicable Service Manual and review: General Description > Repair Contents
> Action required before & after Battery Disconnect. Additionally, record any stored seat
position(s) before proceeding. Relearn any seat position memory after work is complete. If
the power rear gate (PRG) height has been customized, that position must also be noted and
relearned.
• Whenever reconnecting the ground cable terminal to the battery sensor, torque to 7.5Nm
(5.5ft.-lbs. or 66inch-lbs.) while supporting the sensor with the other hand as outlined in the
applicable Service Manual under: STARTING/CHARGING SYSTSEMS > Battery Sensor.
WARRANTY / CLAIM INFORMATION:
For vehicles within the Basic New Car Limited or Powertrain Limited Warranty period or covered by
an active Subaru Added Security Powertrain, Classic or Gold plan, this repair may be submitted using
the following claim information:
Labor Description
Labor
Operation #
Labor
Time
Fail Code
CVT AWD EXTENSION HOUSING/SEALER R&R B303-431 4.8
CVT TRANSFER CLUTCH ASSEMBLY OVERHAUL C303-446 0.5 MSP-26
CM VERSION UPDATE @ REPLACEMENT C860-118 0.3
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Bulletin Number: 16-136-22R; Revised: 06/13/23 Page 8 of 8
IMPORTANT REMINDERS:
• SOA strongly discourages the printing and/or local storage of service information as
previously released information and electronic publications may be updated at any time.
• Always check for any open recalls or campaigns anytime a vehicle is in for servicing.
• Always refer to STIS for the latest service information before performing any repairs.

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