6R140 CATEGORY 2 SUNCOAST 750+ HP 6R140 TRANSMISSION WITH CONVERTER

SUNCOAST 750+ HORSEPOWER 6R140 TRANSMISSION ASSEMBLY

Transmission contains the following:

Introducing the 6R140

The new 6R140 from Ford is definitely one of the most exciting drivetrains on the market today. The new 6R140 was released to replace the previous TorqShift unit, the 5R110. The 5R110 was previously used in both the 6.0 and 6.4 Ford diesel engines. When Ford released the 6.7L Power Stroke powerplant, it also released the much stronger 6R140 TorqShift transmission.

The Ford 6R140 TorqShift transmission is the most robust transmission Ford has yet to build. This unit was designed and manufactured exclusively by Ford Motor Company. First and foremost, Ford opted to incorporate a robust one-piece bellhousing design for the all-new 6R140 TorqShift transmission. This one-piece design is not only tough, but also adds a tremendous amount of rigidity to the case, making torsional flex an afterthought.

The transmission features a very deep first gear, which is great for towing and moving mountains, along with double overdrive for excellent fuel economy. This unit has a total of six forward gears with the following ratios: 1st gear 3.974:1, 2nd gear 2.318:1, 3rd gear 1.516:1, 4th gear 1.149:1, 5th gear 0.858:1, 6th gear 0.674:1.

For maximum efficiency, the patented Lepelletier geartrain reduces the complexities that exist in connecting an automatic transmission's gear sets and clutches. Simply put, the 6R140 uses a simple gearset to drive a Ravigneaux gearset. So the transmission uses just five clutch sets to achieve six forward gears. The 6R140 is further strengthened by the utilization of a powder-metal carrier within the compound Ravigneaux planetary gearset, which is a double planetary gearset. The carrier is made up of four pressed components, which are sinter-brazed together to form a rigid, dense structure.

The torque converter in the 6R140 features an exclusive long-travel, ultra-high-capacity turbine damper designed to soften the extreme force produced by the 6.7L Power Stroke. Here at SunCoast, we have already improved upon this converter, launching our own line of torque converters including a variety of stall speeds.

The Engineering

When SunCoast first took a look at the 6R140 TorqShift transmission, we instantly saw the similarities between the Ford 6R80 and GM 6L80/6L90 platforms. We knew from previous experience the 4-5-6 clutch pack would be the first area that needed to be addressed. The 4-5-6 clutch pack is also known as the E-clutch and is one of the smallest clutch packs in the transmission.

As we tested different friction materials and manufacturers, we saw a pattern develop. The higher the friction coefficient, the more violent the shifts became, especially when adding additional torque into the equation. Oftentimes this creates the 3-4 "squawk" when shifting into 4th gear.

It became very apparent that if we were going to deliver a superior friction material to our customers, this issue would need to be addressed. We have seen competitors simply settle for a clutch with a lower friction coefficient, allowing slip to occur during the shift. While settling on an inferior friction material may be acceptable to some, Ron and the SunCoast development team took a different approach. We decided to take a more scientific approach, and yet another patent hangs on the wall.

The Patent and the Damper

The 6R140 E-clutch hub is designed without any damper. This makes perfect sense because Ford designed the 6R140 TorqShift transmission with torque management in mind. With torque management in place, the engine is defueled during shifts, essentially pulling power between gear changes.

Ford also designed this transmission with a certain torque limit in mind, one that most certainly did not include deletes, larger chargers, and aftermarket tuners. Couple that with the removal of torque management, and you create a situation where failure is imminent.

SunCoast has designed a completely new 4-5-6 clutch hub that incorporates a damper assembly using sound reduction and absorption technology that eliminates the dreaded squawk and restores shift quality. This new clutch hub damper allows for clean, crisp, and silent gear exchange. This lets us use much more sophisticated friction materials with higher friction coefficients, ensuring longevity and reliability.

This patented SunCoast E-clutch hub damper has seen over 1,000 HP reliably and is only available at SunCoast.

SunCoast has also developed a new 4-5-6 E-clutch power pack using nine of our custom frictions. This proprietary SunCoast clutch pack is designed exclusively for our patented clutch hub. This custom SunCoast setup provides a very clean and crisp shift. The extra capacity in the clutch pack, along with the higher friction coefficient, provides unmatched performance.

The Pump Bushing

The factory pump on the 6R140 often suffers a loss of lubrication pressure at the converter hub support pump bearing due to failure of the bearing seal. When the bearing itself fails, catastrophic failure can and will occur. This new bearing restores normal operation and integrity back to the pump.

The Intermediate Shaft

In vehicles with upgraded performance modifications, larger wheels and tires, or heavy towing, it is not uncommon to see the intermediate shaft fail. Now that the overdrive clutches no longer slip during apply, the intermediate shaft is exposed to a greater amount of torsional fatigue. This fatigue from any one of these circumstances can and will cause shaft failure. SunCoast offers a new billet shaft made from maraging steel, also known as Vascomax.

The Billet Flexplate

SunCoast's custom one-piece flexplate is not only stronger, but more durable than any other flexplate out there today. SunCoast's proprietary manufacturing process, utilizing state-of-the-art machining and hardening techniques, ensures unmatched strength and concentricity.

The Deep Pan

The Mag-Hytec 6R140 transmission pan for your 2011-2015 Ford Super Duty 6.7L Power Stroke provides increased fluid and cooling capacity for the automatic transmission in your truck. Built from heavy-duty cast A356-T6 aluminum and powder coated with machined cooling fins, these pans will look great and perform for the lifetime of your truck. This transmission pan is a bolt-on replacement and will hold 5.5 quarts of fluid over stock with an overall height of 4-1/4".

The Guardian Torque Converter

Ford, when designing the 6R140, also added sinter-brazed gear carriers and a dual-media filter that can extend service intervals up to 150,000 miles.

The 6R140 transmission also has an integrated live PTO with a higher torque capacity than its Allison counterpart, while coming in at a stealthy 25 pounds lighter as well.

Captive clutch failure in the Ford 6R140 is a chronic problem that is difficult to address with stock components or traditional methods.