TQ Conv. Bolts TH350/400

The Spectre TQ conversion bolts for TH350/400 transmissions are precision fasteners engineered for builders undertaking torque converter swaps or transmission modifications. Whether you're upgrading from a stock converter to a higher-stall unit, replacing worn fasteners, or completing a full transmission refresh, these conversion bolts deliver the reliability and fit that serious transmission work demands. Spectre's automotive hardware is trusted by mechanics and enthusiasts tackling everything from street performance builds to restoration projects.

These bolts are manufactured to exacting tolerances to ensure proper torque converter seating and secure attachment in both Turbo 350 and Turbo 400 transmission applications. The design accounts for the critical stress cycling that occurs during converter lock-up and release cycles, preventing loosening or drift that could compromise transmission function or cause converter slip. The compact, lightweight profile (0.185 lbs) reflects precision engineering without excess material, while the standardized dimensions ensure compatibility across common TH350/400 platform builds, including those requiring non-OEM converter upgrades.

Mechanics and transmission builders rely on these conversion bolts when installing aftermarket torque converters, performing converter rebuilds, or restoring vintage muscle cars and hot rods with TH350 or TH400 transmissions. Installation is straightforward for anyone familiar with transmission teardown: simply replace worn or damaged fasteners before reassembling the converter hub to the transmission bell housing. Always torque fasteners to manufacturer specifications and use thread-locking compound on critical applications to prevent vibration-induced loosening. This SKU ensures you have the exact hardware needed for a professional, long-lasting installation.