Th350 Race Sprag

The TCI 328910 TH350 Race Sprag is a heavy-duty intermediate band sprag assembly engineered for high-performance TH350 transmissions in street and racing applications. This component addresses a critical need for racers and performance enthusiasts who demand reliable power transfer during aggressive acceleration and gear transitions. Whether you're building a dedicated strip car or upgrading a street machine, the TH350 Race Sprag ensures consistent holding power when it matters most.

Manufactured from hardened steel, this intermediate sprag replaces the factory one-way clutch component and prevents reverse rotation of the transmission's intermediate band during acceleration phases. The precision-engineered steel construction handles sustained high-load cycles and resists wear from repeated engagements—critical in race environments where transmission temperatures spike and shift timing demands perfection. At 1.49 lbs and compact dimensions of 5.5 x 1.95 x 6.1 inches, the sprag integrates seamlessly into the TH350's existing case architecture without modification.

This sprag is essential for Chevrolet-powered vehicles running TH350 transmissions in drag racing, autocross, or high-output street builds where stock components fail under repeated hard launches. Installation requires transmission removal and partial disassembly; professional installation is strongly recommended to ensure proper seating and torque specifications. Pair the TCI 328910 with quality transmission fluid, updated valve bodies, and proper tuning for maximum reliability and performance gains in your TH350 build.