SUNCOAST Pro Street / Competition Automatic Transmission COA-111106

The COA-111106 is Coan Racing’s premium Pro Street/Competition automatic transmission, expertly built on the robust 4L60E platform for high-powered street and competition use. This unit is built around a rugged five-pinion planetary gear assembly that offers superior strength and torque capacity compared to standard gearsets. Reinforced by a heavy-duty sunshell and a super input drum, it ensures structural integrity during high-load scenarios. The inclusion of a billet servo delivers precise band application control, while a 300M alloy output shaft adds aerospace-grade durability to withstand repeated stress peaks. Additionally, the transmission benefits from a high-performance band and a high-energy 3-4 clutch pack, which together provide responsive, reliable shifting and enhanced clutch holding power. Every component is assembled in the USA to Coan Racing’s exacting standards, reflecting their commitment to delivering a transmission that blends street manners with track-ready resilience and power.