GM Torque Converter 10in Big Shot 4100-4500 RPM

The GM Torque Converter 10in Big Shot 4100-4500 RPM from Transmission Specialties is a precision-engineered torque converter designed for GM TH350 and TH400 transmissions. This 10-inch diameter unit delivers a 4100–4500 RPM stall speed, optimizing launch characteristics and driveline responsiveness in high-performance and heavy-duty applications. Built to exacting specifications, the Big Shot XHSXHD model represents the engineering standard for operators and enthusiasts who demand repeatable, reliable torque multiplication across demanding driving conditions.

The 10.750 / 11.500-inch bolt circle accommodates both legacy and modern transmission flanges, providing installation flexibility across classic restorations and modern performance builds. The 4100–4500 RPM stall window is engineered to allow the engine to build torque and rpm before load transfer occurs, translating to controlled acceleration and improved off-the-line performance without excessive slip or heat generation. Weighing 28.1 lbs and measuring 13.65 x 8.2 x 13.75 inches, the unit integrates cleanly into standard transmission housings while maintaining the durability standards expected in extended-duty service.

Operators of high-output diesel trucks, performance muscle cars, and specialized recovery vehicles depend on torque converters that bridge engine and transmission without slipping or cavitation under sustained load. The Big Shot series is purpose-built for crews running extended duty cycles—towing, rock crawling, drag launch, or continuous-duty work—where transmission fluid temperature and converter efficiency directly impact reliability and mission completion. This converter serves users who cannot accept generic OEM replacements and require verified performance characteristics and proven durability in the field.

The TH350 and TH400 transmission families remain the backbone of countless operational platforms, from classic muscle cars to modern diesel swaps. The Big Shot XHSXHD's 4100–4500 RPM stall specification positions it in the sweet spot for drivers seeking improved response without the extreme slip and heat buildup of much higher stall speeds. Transmission Specialties has engineered this converter with internal geometry optimized for consistent torque delivery and cooler operation, critical factors in vehicles run daily or under sustained power demand.