1/5/2024 0 Comments Suncoast transmissionThese new 68RFE transmissions are designed with the builder in mind, we offer from mild to wild depending on what your needs are. 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. The factory molded piston is prone to uneven apply which leads to excessive heat in the clutches and steels creating premature failure. This V2 billet drum is a completely assembled drop-in replacement for 68RFE vehicles. The drum’s wall thickness was also increased to improve drum rigidity and to reduce lateral movement in the overdrive apply plate. The quad-ring design of the inner drum o’ring maintains compression during high RPMs and has consistent factory-like CVIs. Our SunCoast V2 billet drum was redesigned with a new lip seal style for the outer seal by increasing the diameter of the outer sealing surface. There is a 24% improvement in hydraulic clamping force over the factory drum and increased friction elements in overdrive, and all centrifugal apply springs were removed. This new drum has many features that have been improved upon versus previous versions of this particular drum. There has been no other project here that we have invested as much research and development in. The SunCoast V2 68RFE Billet Drum is the most revolutionary thing that has happened to the 68RFE. We aim to offer you the most complete series of 68RFE transmissions available on the market today. We approach each deficiency and need from a scientific approach. The SunCoast Category 68RFE transmissions are designed and developed with intentions of taking a systematic approach to solving the issues with the 68RFE transmission. The predecessor had a single overdrive that was a. The 68RFE was also given two overdrive gears, with 5th being. Chrysler also increased second gear to a 1.83:1 versus the 1.45:1 found previously. 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. The tighter shift recovery essentially keeps the vehicle in higher averaged horsepower and torque numbers, while also adding torque multiplication. The additional gears allowed Chrysler to add higher 1st-gear ratios and tighter shift recovery from one gear to the next. For the 68RFE transmission, Chrysler opted to change to a six-speed unit. The first improvement Chrysler wanted to make over the Torqueflite platform was, obviously, the amount of forward gear. 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 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. 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 RFE design was mostly noted in the new design to have 3 planetary sets for a 4-speed transmission in the 45RFE. "RFE" stands for Rear-wheel drive Fully Electronic control. The RFE platform was originally designed by Chrysler and was introduced in 1999 with the debut of the new Jeep Grand Cherokee. The 68RFE transmission is the big brother to the 45/545RFE transmission. Fitment Notes: 2007-2019 Dodge Cummins 6.7L
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