Ford Mustang 2012–2020 — technical service bulletin
Bulletin SSM 49440 · NHTSA communication 10186595 · issued Jan 13, 2021
Technical service bulletin
communication type
Power Train
component
2012–2020
model years
5
vehicle entries
Official summary
Some 2020 Mustang GT500 vehicles may exhibit various transmission related concerns and/or DTCs. In addition to following normal Workshop Manual (WSM) diagnostics, inspect C105, an inline connector next to the right side valve cover, for signs of pushed out terminals, terminal damage, or harness damage. If any pushed out terminals, terminal damage, or harness damage is found, repair as necessary.
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.