The automatic transmission in a 2015 Mustang is the Ford 6R80 six-speed automatic, used on EcoBoost, V6, and GT models when equipped with an automatic gearbox.
For context, Ford offered three engines in the 2015 Mustang (2.3L EcoBoost, 3.7L V6, and 5.0L V8) with two main gearbox choices. The 6R80 six-speed automatic handled the automatic option across most trims, while a Tremec manual gearbox was available on certain GT configurations. The following breakdown explains which transmissions were paired with each engine and how to identify them.
Automatic transmission options by engine
Below is a breakdown of which engines could be paired with the automatic transmission, noting that manual options were available on certain trims.
- EcoBoost 2.3L: automatic option is the Ford 6R80 six-speed automatic with SelectShift paddle shifters; a manual six-speed was available on some configurations.
- V6 3.7L: automatic option is the Ford 6R80 six-speed automatic with SelectShift; a manual six-speed was offered on some packages.
- GT 5.0L: automatic option is the Ford 6R80 six-speed automatic; GT also offered a Tremec TR-6060 six-speed manual on many trims.
Conclusion: In the 2015 Mustang lineup, the 6R80 six-speed automatic was the primary automatic gearbox across EcoBoost, V6, and GT trims, with the GT continuing to offer a manual Tremec TR-6060 as an alternative for enthusiasts.
Additional details
Identification and usage notes: The 6R80 is Ford’s widely used 6-speed automatic for these models, typically featuring a manual-select mode (SelectShift) and paddle shifters where equipped. If you’re checking a specific car, verify the transmission code on the build sticker or VIN to confirm the exact gearbox.
Summary
For 2015 Mustangs, the automatic transmission is primarily Ford’s 6R80 six-speed automatic across EcoBoost, V6, and automatic GT configurations. The GT could also be equipped with a manual Tremec TR-6060, which remains the alternative for drivers seeking a manual experience. Always verify the exact transmission on a given car via its documentation or VIN.