GM TH350/TH400 Torque Converter 3500 Stall

The Hughes Performance GM TH350/TH400 Torque Converter 3500 Stall is a 10-inch street-strip torque converter engineered for General Motors automatic transmissions requiring precise stall speed control and enhanced engagement characteristics. This single-unit converter delivers the 3500 RPM stall specification demanded by performance builders seeking improved launch dynamics and transmission response in both street and strip applications.

The 10-inch diameter housing accommodates the TH350 and TH400 transmission families, with bolt circle dimensions of 10.750 and 11.500 inches ensuring proper fitment across model variations. The 3500 RPM stall speed establishes the engine RPM threshold at which the converter transitions from stall to coupling, directly affecting launch feel, tire grip optimization, and transmission load management during acceleration. Hughes Performance's billet construction indicates precision manufacturing for consistent performance and reliability across repeated high-stress cycles. At 26.08 pounds, the converter meets the weight specification for stock-ratio applications without requiring driveline rebalancing.

This converter suits enthusiasts and builders modifying classic Chevrolet, GMC, and other GM vehicles equipped with TH350 or TH400 automatics who require improved launch characteristics beyond stock performance. The 3500 stall specification bridges street driving and weekend strip duty, providing sufficient engagement speed for controlled launches without excessive heat generation during normal driving. Buyers upgrading from worn stock converters or seeking to optimize driveline response in restomod and performance builds will find this component addresses the specific engagement and stall-speed requirements of GM C-body and full-size platforms.

Proper torque converter selection depends on engine displacement, horsepower output, vehicle weight, and intended use. The 3500 stall speed is optimized for moderate to higher-output engines (typically 350 cubic inches and larger) where factory stall speeds prove insufficient for effective acceleration but excessive stall speeds risk transmission overheating in traffic. Installation requires transmission removal and specialized tools; professional assembly is recommended to ensure proper internal component alignment and cooling line connections.