Tuff Mounts Transmission Mounts are engineered to deliver strength, stability, and vibration control for high-performance drivetrains. Designed to suit a wide range of transmissions — including T56, Powerglide, Turbo 400, and more — our mounts provide a precise, bolt-in fit with no guesswork. Ideal for LS and Barra conversions, they’re built tough to handle street, strip, or track abuse while keeping your gearbox secure and aligned.