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HomeShop by DepartmentPerformanceTransmissionsRebuild KitsSuncoast 68RFE Category 1 Rebuild Kit (WITH CONVERTER) - 2007.5-2018 6.7L

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Suncoast 68RFE Category 1 Rebuild Kit (WITH CONVERTER) - 2007.5-2018 6.7L

Thoroughbred Sku #: SUNSC-68-1-CRE

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$4,495.00 On Sale! $4,045.50

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Terms & Conditions for Cores

Many stock replacement parts such as turbos, injectors, injection pumps, and high pressure oil pumps have a core charge that is associated with the new replacement part. You must return the old part to receive a refund on the core charge.

In some cases, the core is not reusable, such as in the event of a cracked case, at which point the core deposit would not be credited as the core component is not reusable.
Cores that have been disassembled and/or have missing and/or damaged major components will not receive full core credit.
Returned cores must be on a "like-for-like" basis, meaning that the returned core has the exact same fitment as the remanufactured component that was purchased. If the core is not "like-for-like," your core may not be eligible for return/credit.
You are responsible for core return shipping cost.

If you plan on returning your core you have two options.

Thoroughbred Diesel offers defer the upfront core charge when purchasing via credit card payment.

OPTION 1: You can accept the core charge, which means you will be charged for the part AND the core at time of purchase. You still have the option to send it back, and if you do, the core will be refunded back on the card used, presuming the core meets core criteria and the core is returned within 30 days from the time your order is received. If you return your core after 30 days you may refer to the Core Charge Timeline below as to how you will be refunded.

Core Charge Timeline

If the core is returned after 30 days, 90% of the core will be refunded.
If the core is returned after 60 days, 70% of the core will be refunded.
If the core is returned after 90 days, 50% of the core will be refunded.
After 6 months cores will be accepted at Thoroughbred’s discretion.

OPTION 2: You can defer the core charge. If you defer, you will not be charged for the core at the time of purchase. You will have 21 days from the time your order is received to send the core back. If the core is not received within the 21 days, your credit card will be charged for the core amount on your order. If you return your core after 21 days, you may refer to the Core Charge Timeline below as to how you will be refunded. When Core deferral (Pay Core Charge Later) is limited to payment by credit card only. ***When using PayPal or Affirm as your method of payment “Core Deferral (Pay Core Charge Later)” is not available. The core must be paid at time of purchase. ***

Core Charge Timeline

If the core is returned after 21 days, 90% of the core will be refunded.
If the core is returned after 60 days, 70% of the core will be refunded.
If the core is returned after 90 days, 50% of the core will be refunded.
After 6 months cores will be accepted at Thoroughbred’s discretion.

Core Return Procedure

Please keep all original packaging of your new item to be used for the core return.
Drain all fluids: oil, fuel, etc. out of the core before it is returned.
Place any plastic plugs or caps received on the new item back onto the core.
To insure UPS, Fed Ex, or USPS will not reject the package due to fuel or oil leakage, please wrap the core in a plastic garbage bag.
Place core inside the box.
If core return paperwork was inside the box, please complete the form and send back with the core.
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Product Details

Product Name: Suncoast 68RFE CATEGORY 1 REBUILD KIT - 2007.5-2018 6.7L Rebuild Kit
Manufacture: Suncoast
Manufacture Part #: SC-68-1
Thoroughbred Diesel Part #: SUNSC-68-1
Fitment Notes: 2007.5-2018 Dodge Cummins 6.7L

The 68RFE

The 68RFE transmission is the big brother to the 45/545RFE transmission. The RFE platform was originally designed by Chrysler and was introduced in 1999 with the debut of the new Jeep Grand Cherokee.

The "RFE" stands for Rear-wheel drive Fully Electronic control. The RFE design was mostly noted in the new design to have 3 planetary sets for a 4-speed transmission in the 45RFE.

In 2007, Chrysler debuted the new 6.7 Powerplant in the all new Dodge Ram, and Dodge wanted a transmission that was specifically designed for function. The previous platform utilized the Torqueflite 48RE platform and had been around since the late 50's when they released the first 727 in 1956 after purchasing the license from Simpson on the gearset in 1955.

The 46/47/48 Chrysler platforms were 3 and 4-speed units that were mechanically and hydraulically controlled, with the most notable control system being governor pressure.

The first improvement Chrysler wanted to make over the Torqueflite platform was, obviously, the amount of forward gear. For the 68RFE transmission, Chrysler opted to change to a six-speed unit. The additional gears allowed Chrysler to add higher 1st-gear ratios and tighter shift recovery from one gear to the next. The tighter shift recovery essentially keeps the vehicle in higher averaged horsepower and torque numbers, while also adding torque multiplication.

The gear ratios were increased. as well. The new 68RFE boasts a whopping 3.23:1 first gear, compared to the 2.45:1 first gear found in the previous 47/48RE platform. Chrysler also increased second gear to a 1.83:1 versus the 1.45:1 found previously. The 68RFE was also given two overdrive gears, with 5th being .81:1 and 6th with the very deep .62:1. The predecessor had a single overdrive that was a .69:1.

The Category Kits

The SunCoast Category 68RFE transmission rebuild kits are designed and developed with intentions of taking a systematic approach to solving the issues with the 68RFE transmission. We approach each deficiency and need from a scientific approach.

These kits offer you the same recipes that are used in our facility. We aim to offer you the most complete series of 68RFE rebuild kits available on the market today.

The Smart Tech Drum

The factory overdrive clutches are at a high risk of failure when towing or installing aftermarket programmers, delete kits, or larger turbos. This is in large part to the fragile and thin (.034) single-sided clutches. When exposed to increased torque or higher temperatures, they will distort, causing additional clearance and uneven apply. This will always result in burnt clutches. These clutches in the overdrive housing are, by far, the weakest link in the 68RFE transmission design.

The Sonnax Smart Tech 68RFE overdrive drum addresses these issues. The new billet clutch housing holds a physically taller clutch pack, allowing the overdrive apply clutch area to increase 16%. In addition to the increased apply surface area, the thicker clutches and steels increase clutch steel mass by 28%, drastically improving the heat dissipation.

The new 68RFE overdrive clutch drum also comes with a top bolt-on plate to help eliminate clutch pack flexing and distortion that contribute to premature failure.

The 2C Piston

The factory molded piston is prone to uneven apply which leads to excessive heat in the clutches and steels creating premature failure. In this 68RFE transmission rebuild kit we replace the factory piston with a much improved billet piece that also allows for one additional clutch further increasing surface apply area. This new billet apply pistons corrects these issues and adds matched performance.

The Solenoid Repair and Spacer Kit

The factory 68RFE transmission is known for giving false pressure switch codes. These false 68RFE pressure codes some times are the result of circuit board flexing. The 68RFE transmission solenoid block can very easily be rebuilt with this Sonnax kit. This 68RFE transmission solenoid repair kit uses both a spacer to stop the circuit board flexing and improved sealing components to prevent leakage.

The plate to serve on

There factory 68RFE transmission accumulator plate is very weak and not held securely. This problem becomes even more apparent with the addition to higher line pressure which is a very common modification performed on the 68RFE

The Torque Converter

This Category 1 SunCoast Torque Converter fits 68RFE transmissions and is engineered to handle all of your every-day DUTies. Whether you’re towing a camper or hauling dirt to a job site, this torque converter is designed to improved vehicle response and give you years of solid, reliable performance. It comes with furnace-brazed fins and hardened turbine splines. The clutches in this converter are carbon-graphitic for precise and accurate lock-up.

If you’re looking to increase the performance of the factory unit—and looking for a cost-effective solution—this is the converter for you. This converter, while great for heavy Duty towing and hauling, is it not intended for racing.

This torque converter has a 2,000 RPM factory stall speed.

These new 68RFE transmission rebuild kits are designed with the builder in mind, we offer from mild to wild depending on what your needs are.

Suncoast Dodge Rebuild Kit Features:

New Sonnax Smart Tech Overdrive Drum Assembly
New 68RFE Thrust Washer Kit
New 68RFE Thrust Bearing Kit
68RFE Complete Gasket and Sealing Kit
68RFE Spin-on Filter
68RFE Pan Filter
68RFE Underdrive and Overdrive piston set
Upgraded 2C Clutch Set
68RFE Billet 2C Piston
For more information or help on this or other Suncoast Rebuild kits call us at 1-859-737-4966.

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Is there any other upgrades needed to use this kit?

Arturo | 10/21/2020
No performance upgrades required.

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