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  1. TH400 Specs, Info, and Identification | Drivetrain Resource

    The TH400 is an aluminum cased three speed automatic transmission that was produced by GM. It was introduced for the 1965 model year and made its debut in Cadillacs, and is respected …

  2. ATI Racing Transmissions - TH400 Drag Racing Transmissions

    Note: Any ATI TH400 can be made to PG length for an additional charge. Call and check core availability for 4WD units. Refundable core charge for acceptable transmission core is …

  3. Turbo-Hydramatic - Wikipedia

    These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain, providing three forward speeds plus reverse. The Turbo-Hydramatic or Turbo Hydra …

  4. The Novak Guide to the GM TH400 Automatic Transmission

    GM TH400 Automatic Transmission The TH400 is an automatic shift, three-speed, longitudinally positioned transmission. It is widely regarded to be a supremely durable and legendary …

  5. TH400 - Jake's Performance

    We offer a TH400 setup for Rockcrawler and off-road applications. This is similar to our Stage I build but uses a HD “K” case 4×4 TH400 core with a reverse pattern manual valve body that …

  6. Custom-Built TH400 Transmission | Gearstar

    Stepping up in strength and capability, the Turbo 400, or TH400, is renowned for its resilience under pressure. This three-speed automatic transmission has been the backbone of many …

  7. TH400 - tsirace.com

    From mild to wild, our lineup of TH400 transmissions are ready to handle up to 2200 horsepower no matter the application. Whether you’re on a prepped surface, a concrete patch, dirt, an oval …