ATTENTION:
GENERAL MANAGER

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PARTS MANAGER

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CLAIMS PERSONNEL

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IMPORTANT - All
Service Personnel
Should Read and
Initial in the boxes
provided, right.

SERVICE MANAGER

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© 2022 Subaru of America, Inc. All rights reserved.

SERVICE BULLETIN
APPLICABILITY: 2019-22MY Ascent

2020-22MY Legacy & Outback 2.4L Turbo

NUMBER: 16-136-22R
DATE:

01/20/22

SUBJECT:

REVISED:

06/13/23

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).

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.

Subaru of America, Inc. is
ISO 14001 Compliant
ISO 14001 is the international standard for
excellence in Environmental Management
Systems. Please recycle or dispose of
automotive products in a manner that is friendly
to our environment and in accordance with all
local, state and federal laws and regulations.

Continued...
Bulletin Number: 16-136-22R; Revised: 06/13/23

Page 1 of 8

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

806536020

806535030

806535030

806535040

806535040

806535050

1*

THRUST BEARING

806535050

806535060

806535060

806535070

806535070

806535090

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)

Model

Transmission Fluid

ALL

High Torque CVTF-LV

High Torque CVT-LV (As Needed)

Part Number

Quantity/Unit/Pack

SOA748V0300

5 Gallon Pail

SOA748V0310

16-Gallon Keg

Warranty Part #
SOA635312

Continued...
Bulletin Number: 16-136-22R; Revised: 06/13/23

Page 2 of 8

SERVICE PROCEDURE / INFORMATION:
Procedure Overview Flowchart:

Continued...
Bulletin Number: 16-136-22R; Revised: 06/13/23

Page 3 of 8

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 DCA8000 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.

Continued...
Bulletin Number: 16-136-22R; Revised: 06/13/23

Page 4 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.

•