NHTSA ID Number: 11034271
Manufacturer Communication Number: 16-151-24R
TSB/Document Date: 2026-07-02
Summary
This bulletin provides guidance when diagnosing chain slip, judder, shudder, and hesitation concerns on the TR690 model CVT transmissions used in the models listed. (This is an revised version of the original bulletin.)
ATTENTION:
GENERAL MANAGER
q
PARTS MANAGER
q
CLAIMS PERSONNEL
q
IMPORTANT - All
Service Personnel
Should Read and
Initial in the boxes
provided, right.
SERVICE MANAGER
q
© 2024 Subaru of America, Inc. All rights reserved.
SERVICE BULLETIN
APPLICABILITY:
2020+ MY Legacy & Outback
2022+ MY WRX (A/T Only)
2019+ MY Ascent
NUMBER: 16-151-24R
SUBJECT:
TR690 Chain Slip, Judder, Shudder, &
Hesitation Concerns
DATE: 10/22/24
REVISED: 06/04/26
INTRODUCTION:
This bulletin provides guidance when diagnosing chain slip, judder, shudder, and hesitation concerns
on the TR690 model CVT transmissions used in the models listed above. The information below
outlines the diagnostic flow in addition to the previously released related reference material. Always
refer to the information within this bulletin prior to any other previously released material when
addressing chain slip, judder, shudder, and hesitation concerns experienced by a customer.
SERVICE BULLETIN SUMMARY TABLE:
The following table below displays TR690 DTC related bulletins. Use this tables as reference as you
may be directed to one of these documents using the service procedure information in this bulletin.
SERVICE BULLETIN SUMMARY TABLE
Status
TSB #
Subject
Starting
MY
Ending
MY
Model
DTC Related
Bulletin
16-135-21R
DTC P0871 – Transmission Fluid Pressure
Sensor/Switch “C” Circuit Range/
Performance
2022
2022
Outback Wilderness
DTC Related
Bulletin
16-145-23
DTC P2797 / Reprogramming Files
2023
2024
Legacy & Outback
2.4L Turbo
2022
2022
Legacy & Outback
2.4L Turbo
2022
2022
Outback Wilderness
2022
2022
Ascent
2019
2023
Ascent
DTC Related
Bulletin
DTC Related
Bulletin
16-142-23
16-144-23
DTC P2715 (Pressure Control Solenoid “D”
Stuck On) Diagnosis
DTC P0711, P0712, P0713 Diagnostic
Procedure
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: 16-151-24R; Revised: 06/04/26
Page 1 of 27
CUSTOMER INTERVIEW INFORMATION:
The customer interview is a vital part of performing an accurate diagnosis. Listed below are
some examples of key wording/phrasing and conditions to be used to help accurately pinpoint the
appropriate diagnostic strategy. When interviewing the customer, referencing the below diagram will
help both the customer and retailer grasp the type of condition to be considered for diagnosis.
NOTE: This bulletin requires a test drive for concern replication. Technicians must follow
instructions, refer to relevant appendices, and record data using the Select Monitor. This
ensures accurate diagnosis and avoids repetitive test drives.
To ensure all necessary data is collected during the road test, record ALL TCM PIDS.
Depending on the diagnosis and repair procedures, the vehicle may need the latest software.
The table below is a general guide to recent reprogramming file improvements. ALWAYS
REFER TO THE LATEST TSB FOR REPROGRAMMING FILE APPLICATION AND
AVAILABILITY.
Current Reprogramming File Improvement Description
(Always refer to Applicable TSB for Details)
Applicable TSB
Noise & Vibration When Turning (Appendix A- Section 5)
Chain Slip Feeling Countermeasure
16-136-22R
Ascent Long Lockup Judder (Appendix A- Section 2)
16-140-23
Ascent P0711 Transmission oil temperature sensor A system circuit characteristic error
16-141-23R
Ascent Lock-up Judder- (Appendix A- Section 2)
TBD
Vibration during FWD clutch slip (Appendix A- Section 3)
TBD
23MY Legacy/Outback P2797 Shock upon restart from ISS
16-145-23R
23-25MY Legacy/Outback/Ascent/WRX Shudder during Deceleration W/ AC ON (Appendix
A-Section 4)
16-150-24
23-24MY Legacy/Outback/Ascent/WRX Input Clutch Slip
16-150-24
CVT Drivability Diagnosis Assistance Application User Guide
16-154-25
Continued...
Bulletin Number: 16-151-24R; Revised: 06/04/26
Page 2 of 27
A CVT Diagnostic Assistance Application was developed to support technicians diagnosing
CVT-related concerns for potential repair under a Subaru warranty. Use of the application is
required when performing work that will be claimed under warranty. If the tool is unavailable,
or if a technician prefers to review data manually for a non-warranty repair, then following the
standard diagnostic flow remains an acceptable approach.
TR690 DRIVABILITY CONCERN DIAGNOSTIC PROCEDURE:
Refer to the work flow chart below to confirm the next course of action.
Continued...
Bulletin Number: 16-151-24R; Revised: 06/04/26
Page 3 of 27
SECTION A: [While Drive Straight]
Refer to the workflow chart below to confirm the next course of action.
Continued...
Bulletin Number: 16-151-24R; Revised: 06/04/26
Page 4 of 27
SECTION B: [When Turning]
Refer to the workflow chart below to confirm the next course of action.
Continued...
Bulletin Number: 16-151-24R; Revised: 06/04/26
Page 5 of 27
SECTION C: [Both Driving Straight & Turning]
Refer to the workflow chart below to confirm the next course of action.
Continued...
Bulletin Number: 16-151-24R; Revised: 06/04/26
Page 6 of 27
SECTION C: [Both Driving Straight & Turning] (Continued)
Continued...
Bulletin Number: 16-151-24R; Revised: 06/04/26
Page 7 of 27
SECTION D: (Confirmation of Repair)
WARRANTY / CLAIM INFORMATION:
For vehicles within the Basic New Car Limited Warranty period or covered by an active Subaru
Added Security Classic or Gold plan, this repair may be submitted using the following claim
information:
NOTE: For warranty purposes, the CVT Application must be used during diagnosis. Additionally, the
Diagnostic ID generated by the CVT Application must be recorded in the “Miscellaneous” section of
the warranty claim.
Continued...
Bulletin Number: 16-151-24R; Revised: 06/04/26
Page 8 of 27
Flow Chart A:
Labor Description
Labor Operation #
Labor Time: Ascent
Labor Time:
Outback/Legacy
Labor Time:
WRX
CVT Diagnosis
B303986
0.6
0.6
0.6
CVT Replace and TCM
Update/Check *
C303186
5.2
5.2
4.8
QMR Submission with CVT
Replace**
C303386
CVTF Replacement and
TCM Update/Check *
C303686
0.5
0.5
0.5
MQU-26
Torque Converter & CVTF
replacement and TCM
Update/Check *
C303286
5
4.9
N/A
LAA-26
Fail Code
MQJ-24
TMA-26
TMB-26
0.2
MQJ; New CVT Assembly
TMA; Replace OE or NEW CVT with Reman CVT(Remanufactured TR690 units are now available for Legacy/
Outback & Ascent
TMB; Replace Reman CVT with Reman CVT(Remanufactured TR690 units are now available for Legacy/
Outback & Ascent
*Include current or New CID# in warranty claim.
Flow Chart B:
Labor Description
Labor Operation
#
Labor Time: Outback/
Legacy/Ascent
Labor Time:
WRX
CVT Diagnosis
B303986
0.6
0.6
Fail Code
MSP-26
Transfer Clutch R&R and TCM
Update/Check *
C303486
5.7
N/A
*Include current or New CID# in warranty claim.
Continued...
Bulletin Number: 16-151-24R; Revised: 06/04/26
Page 9 of 27
Flow Chart C:
Labor Description
Labor
Operation #
Labor Time:
Ascent
Labor Time
Outback/Legacy
- CUTTING EDGE TECHNOLOGY - Shockproof technology designed to...
- QUIET SMOOTH SHIFTING - V-Twin Transmission oil dampens...
- IMPROVES PERFORMANCE - Transmission fluid that dramatically...
- POPULAR POWESPORTS OIL FOR - UTVs & Side by Sides, ATVs...
- WHY RED LINE - Established in 1979, Red Line Products...
- EXCELLENT - gear and synchro protection, balanced...
- ALSO USED WITH - manual transmissions and transaxles like...
- MOST VERSATILE ATF - use where Dexron III, Dexron II, Mercon...
- POPULAR TRANSMISSION FLUID FOR - Toyota Type T-III and T-IV...
- WHY RED LINE - Established in 1979, Red Line Products...
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TSB/Document ID: 16-151-24R
Replacement Service Bulletin Number:
MFR Communication Date: 2026-06-05
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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