6R140
6R140 2015-2016 Ford F250/F350 Super Duty with 6.7L โ Remanufactured 6-Speed Automatic Trans
Signs your 6R140 is failing
Catch these early and you replace one transmission, not a transmission and a tow bill.
Often a solenoid body or control issue.
Torque converter clutch wear.
Clutches glaze from heat and heavy loads.
Undersized cooling or low fluid on long, loaded climbs.
Sensor or solenoid faults trigger a default gear. Scan the codes first.
A sign of overheated friction material.
Used vs. rebuilt vs. reman 6R140
| Used | Rebuilt | Remanufactured | |
|---|---|---|---|
| Wear parts replaced | None | Failed parts only | All of them |
| Known weak points addressed | No | Rarely | Yes |
| Testing | "It ran" | Basic | Dyno-tested |
| Typical warranty | 30โ90 days | 6โ12 months | Up to 5 years |
6R140 questions, answered
What trucks use the 6R140?
The 6R140 is used in Ford F-250, F-350, F-450 and F-550 Super Duty trucks from 2011 on, with the 6.7L Power Stroke diesel and 6.2L gas V8.
Is the 6R140 a good transmission?
It is a strong heavy-duty design. Most failures come from heat and heavy towing, so cooling and fluid maintenance matter.
What replaced the 6R140?
Ford introduced the 10R140 10-speed in Super Duty trucks starting with the 2020 model year.


