The site navigation utilizes arrow, enter, escape, and space bar key commands. Left and right arrows move across top level links and expand / close menus in sub levels. Up and Down arrows will open main level menus and toggle through sub tier links. Enter and space open menus and escape closes them as well. Tab will move on to the next part of the site rather than go through menu items.

HomeShop by DepartmentPerformanceTransmissionsTransmissionSuncoast 68RFE CAT 1, 500 HP Transmission 2007.5-2018 4WD (WITHOUT CONVERTER)

Suncoast 68RFE CAT 1, 500 HP Transmission 2007.5-2018 4WD (WITHOUT CONVERTER)

Thoroughbred Sku #: SUNSC-68RFE-1-07518-4WD-LC-CRE

Your Selected Vehicle Does Not Fit, Please Select a Vehicle

Select a Vehicle

Selected Vehicle

Select Vehicle

Year/Make/Model: {{year}} {{make.Name}} {{model.Name}} Edit

Item Options:

Prop 65:

WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov

Shipping Restrictions:

This part is NOT available to ship to the state of California.

PAYMENT NOTE: If you choose Pay Core Later, from the Core option below, you will not be able to pay for this order using Affirm or PayPal

$6,400.00

+ $400.00 Shipping

* Core Exchange Option:

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.
Please provide a tracking number to [email protected]. Without a confirmed tracking number we cannot guarantee your core refund
If you have questions please call our core department 859-737-4966 ext. 5

I have read and I accept the terms and conditions.

Applications:

View All applications

VERIFY VEHICLE FIT

QTY:

Product Details
Reviews
Questions & Answers

Product Details

Product Name:Suncoast 68RFE CAT 1, 500 HP Transmission 2007.5-2018 4WD (WITHOUT CONVERTER)
Manufacturer: Suncoast
Manufacturer Part #: SC-68RFE-1-07518-4WD-LC
Thoroughbred Diesel Part #: SUNSC-68RFE-1-07518-4WD-LC
Fitment Notes: 2007.5-2018 Dodge Cummins 6.7L 4WD

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. "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 Transmissions

The SunCoast Category 68RFE transmissions 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.

We aim to offer you the most complete series of 68RFE transmissions 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.

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

The Ducenti

SunCoast is proud to release its new Pro-Loc Ducenti 200psi Shift Calibration Kit for the 68RFE. What we present to you today is not just a haphazardly put together solution but the cumulation of many years of refinement.

In this valve body, we address several key issues within this hydraulic circuit using a multi-faceted approach. This kit includes everything you will need to achieve 200psi without any additional tuning and is designed to be a complete drop-in.

Features and benefits of this shift calibration kit include a new pump half, TCC limit valve, TCC switch valve, five billet three-ring accumulator pistons, billet upgraded valve body plate, an upgraded heavy duty accumulator plate, and custom-calibrated spring rates for PR circuit.

The Solenoid Pack

Every new Suncoast transmission receives a new OEM solenoid back from Mopar.

Zero Cavitation Filter Kit

The factory 68rfe has had many issues with pressure relief check valve system on the transmission pan filters. Initially Chrysler had issues with the plastic filter splitting in half. This was later remedied by adding a pressure relief valve on top of the filter. This later showed to be an issue as the valve would release itself from the filter all together.

This new bottom feeder filter kit allows the usage of a torqueflite filter. This filter conversion will not only prevent pump cavitation but will allow higher volume of fluid to be passed through the system.

Suncoast Transmission 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
Suncoast Ducenti Valve body
Suncoast Zero Cavitation filter kit
SunCoast OEM Solenoid Pack
450 Horsepower
For more information on Suncoast call us at 1-859-737-4966.

Reviews

Submit a question

There are no Questions to display

Diesel Performance Products & Parts

Diesel Truck Stock Replacement Parts | OEM Parts

Tractor Parts | Tractor Injectors, Injection Pumps, Turbos

Custom Truck Accessories - Tonneau Covers, Nerf Bars & More

Gooseneck & Fifth Wheel Hitches | Truck Towing Products

Thoroughbred Diesel Shirts, Hats, License Plates