It is not uncommon to see the thrust washer that rides on top of the 4C reaction ring gear in a 68RFE to fatigue and break into several pieces. When this failure occurs, it results in catastrophic transmission failure. The 2007.5-2021 Ram 68RFE factory unit is manufactured from plastic making it ineffective under high thrust loads. It also leads to the diminished reliability and longevity.
SunCoast's Billet 4C Reaction Ring Gear Thrust Washer is a redesigned piece to help improve reliability and durability of the 68RFE. The washer is manufactured from a solid piece of billet T6-6061 aluminum. Suncoast also engineered angled oil slots to improve fluid feed to the 4c clutches and greater load distribution versus the factory. Leave it to SunCoast to create another absolute must for any 68RFE transmission rebuild.