The 6R140 is Ford's six-speed automatic for their 2011-2019 Super Duty trucks. It's design is based on longtime transmission manufacturer ZF's ZF6HP26, so its overall architecture is proven, but this heavy duty version does have its own issues that are remedied with these parts and procedures among others:
100% New valve body & solenoid replacement
100% Bushing replacement - Maintains line pressure and prevents issues due to leaks
100% Updated to latest Sonnax pump bearing - High wear area
100% Dyno tested
Our experience at PowerSource is unmatched, so feel free to contact us via the Chat option or call us on the toll-free line and we'll be happy to do more than read a script to you; we have actual building and repair experience.