Answer
Apr 28, 2026 - 06:40 AM
The ATS Heavy Duty Overdrive Clutch Drum (314-505-2326) works in 66RFE transmissions. This billet aluminum drum assembly is designed to fit 68RFE, 66RFE, 65RFE, and 545RFE transmissions in 2007.5+ Dodge Ram 2500/3500 6.7L Cummins applications.
The drum increases overdrive apply area by 16% and clutch capacity by 20% compared to stock. It uses 2X thicker steels and double-sided clutches that increase steel mass by 28% for better heat dissipation. Note that this kit requires assembly - the drum and clutches arrive disassembled.
