TH350 Drum Assy - Direct w/36 Element Sprag

The ATI PERFORMANCE TH350 Drum Assy - Direct w/36 Element Sprag is a precision internal component designed for transmission builders, performance shops, and hot rod enthusiasts who are upgrading or rebuilding TH350 automatic transmissions. This drum assembly plays a crucial role in the mechanical interface between the transmission's input shaft and the planetary gear set, controlling torque transfer and shift timing under demanding conditions.

The 36-element sprag design is a key feature of this drum assembly, providing one-way directional holding that locks the drum during engine braking and prevents backdriving under load. The direct-mount configuration is engineered to minimize slippage and enhance mechanical efficiency, resulting in improved engagement and consistent shift feel. Constructed from hardened steel and featuring a precision-machined bore, this assembly is built to withstand the rigors of high-rpm operation and aggressive shift programming.

Ideal for street machines, bracket racers, or classic restorations with modern performance upgrades, this component is essential for achieving reliability and repeatable power delivery. While it is designed to fit standard TH350 cases, users should verify compatibility with their specific setup. Weighing 6.5 lbs and with compact dimensions, this assembly is a practical choice for enhancing TH350 transmission performance.