6R140 Cat 4 750HP+ Rebuild Kit

Features:

• Supports builds up to 750 horsepower
• Fits 2011-2019 Ford F250 and F350 6.7L
• Includes Guardian torque converter upgrade
• Billet flexplate enhances strength and reliability
• Comes with billet clutch and intermediate hubs
• Heavy duty 4-5-6 overdrive clutch pack
• Carbon graphitic clutches for improved durability
• Custom machined steels increase clutch life
• Sure Cure valve body kit improves shift quality
• New pump bushing and transmission filter included
• Includes complete gasket, seal, and O-ring kit
• Ideal for high performance rebuilds or upgrades

Built To Handle Power Without Compromise

If your 6.7L Powerstroke is making serious power or you plan to push it there, the SunCoast Cat 4 rebuild kit is how you keep the 6R140 alive and thriving. This kit is designed for owners who want confidence every time they put their foot down, whether that truck is towing heavy or laying down hard acceleration. SunCoast has been building high-performance transmissions for decades, and that experience shows in how complete and well thought out this package is. From the billet flexplate to the Guardian torque converter, every component is chosen to improve strength and longevity where the factory parts fall short. The upgraded clutch packs and steels are built to handle heat and torque without slipping or wearing prematurely. This is the kind of rebuild you do once so you do not have to revisit it again later. If you want your truck to feel solid, responsive, and reliable at higher power levels, this kit delivers exactly that.

Engineered Upgrades For The 6R140 Platform

The SunCoast SC-6R140SC-4 Cat 4 rebuild kit is designed for the 2011-2019 Ford F250 and F350 equipped with the 6.7L Powerstroke and 6R140 transmission. It includes carbon graphitic clutches, custom machined steels, and an improved heavy-duty 4-5-6 overdrive clutch pack with increased clutch count. A billet intermediate shaft, billet clutch hub, and SunCoast patented 4-5-6 dampener hub are included to address known weak points under high torque. The kit also features a Sure Cure valve body repair and calibration kit to improve hydraulic control and shift consistency. A Guardian torque converter and billet flexplate are included to better manage torque transfer and dampen drivetrain shock. New pump bushings, bearings, seals, gaskets, and a transmission filter ensure the rebuild is complete from front to back. Designed to support builds exceeding 750 horsepower, this kit is ideal for high-performance street, towing, or competition applications.

Fitment: 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Ford F250/F350 6.7L Powerstroke

Notes:

• Designed for 2011-2019 Ford F250 and F350 6.7L Powerstroke
• Supports power levels of 750 horsepower and beyond
• Engineered specifically for the 6R140 TorqShift transmission
• Includes Guardian torque converter and billet flexplate
• Thorough rebuild kit addressing all major weak points
• Billet 4-5-6 hub and intermediate shaft improve durability
• Sure Cure valve body kit helps improve shifting performance
• Ideal for high performance, towing, and heavy-use applications
• Custom clutches and steels increase holding capacity
• Professional installation is strongly recommended
• Not intended for stock trucks with low power output
• Based on SunCoast's decades of transmission experience