Subaru Ascent 2019–2022 — technical service bulletin
Bulletin 16-151-24R · NHTSA communication 11023499 · issued Sep 2, 2025
Technical service bulletin
communication type
Power Train
component
2019–2022
model years
4
vehicle entries
Official 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.
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.