TKX 5-Speed Transmission GM 26-Spline

The TKX 5-Speed Transmission GM 26-Spline is a modern overdrive solution designed for classic and restomod General Motors vehicles that aim to enhance fuel economy and highway cruising performance. This transmission upgrade effectively addresses the limitations of original three- and four-speed gearboxes, providing the efficiency and performance expected in contemporary automotive builds. Whether you're restoring a muscle car, building a street rod, or upgrading a vintage truck, the TKX transmission offers the versatility to balance power delivery with real-world drivability.

Engineered specifically for GM engine platforms with 26-spline output shafts, this 5-speed manual transmission incorporates modern synchronizer technology and internal gear ratios optimized for both acceleration and highway efficiency. The design includes a true overdrive fifth gear, which reduces engine RPM at cruising speeds, thereby lowering heat generation and extending drivetrain longevity. Weighing approximately 65 lbs, the TKX transmission is competitively lightweight while maintaining robust internal construction capable of handling realistic street torque loads.

Builders and restorers of early-generation GM vehicles, particularly those equipped with small-block or big-block Chevy engines, will find this transmission to be an ideal choice. Its compact footprint, measuring 18 x 14 x 34 inches, facilitates installation in applications where space constraints would reject heavier or bulkier alternatives. The TKX transmission is perfect for street, restomod, and daily driver applications, ensuring a reliable and enjoyable driving experience.