FTI Transmissions Converters Automatic Transmission Assembly

FTI Performance Automatic Transmission Assemblies: Race-Proven, Hand-Built Excellence

When it comes to complete automatic transmission assemblies built for real-world performance demands, few names carry the weight that FTI Performance does. FTI Transmissions & Converters was founded with a singular mission: to deliver the absolute best in quality and craftsmanship to the high-performance automatic transmission market. What began as a torque converter operation run by Greg and Phaedra Samuel out of DeLand, Florida has evolved into one of the most respected names in performance automatic transmission assemblies and driveline components.

Hand-Built Quality, Engineered for Competition

What sets FTI apart in the automatic transmission assembly category is how their units are actually made. Every transmission is hand-built and assembled by individual builders, with in-house machining performed to exacting tolerances — a process designed specifically to withstand the extreme rigors of competition use. This isn't mass-production; it's precision craftsmanship applied to each unit that leaves the shop.

FTI's complete transmission assemblies are rooted in proven GM platforms — the Powerglide, Turbo-Hydramatic TH400, 700R4, and 4L80E — each enhanced with FTI's proprietary modifications and performance upgrades. Their Pro Series Powerglide, for instance, features redesigned valve bodies and spiral springs for increased power handling, with certain builds capable of managing up to 3,000 horsepower. For off-road and 4x4 applications, their Mud Race Powerglide is purpose-built with 7 reverse clutches, 8 direct clutches, 250 pounds of line pressure, and a ProMud trans brake — a setup that eliminates the need to separately activate for reverse.

Complete Assembly Options Across Popular GM Platforms

FTI's automatic transmission assembly lineup spans a wide range of performance levels and applications. Their 700R4 kits are available in multiple build levels — from entry-level street-capable assemblies rated around 450 hp to more aggressive configurations — and frequently include a matching torque converter, dipstick, and hardware for a complete drop-in solution. The TH400 assemblies are offered in multiple build levels as well, including reverse-shift-pattern versions for full competition use. More recently, FTI has introduced 4L80E transmission assemblies and kits, expanding their reach into heavier-duty and overdrive applications.

Having bracket race experience baked into the company's DNA means FTI understands what racers and performance enthusiasts actually need from a complete assembly: precise calibration, consistent shift behavior, and the confidence that comes from knowing exactly how a transmission was built. That experience translates directly into every complete unit they produce.

Why Choose an FTI Complete Transmission Assembly?

• Hand-assembled by individual builders with in-house machining to tight tolerances
• Multiple build levels to match street, bracket race, or all-out competition requirements
• Platform-specific engineering across Powerglide, TH400, 700R4, and 4L80E families
• Converter-inclusive kits available for a simplified, matched drivetrain upgrade
• Deep racing pedigree developed alongside drag racing competitors since the brand's founding

Whether you're building a dedicated drag car, a high-powered street machine, or a mud-racing 4x4, FTI's automatic transmission assemblies offer a level of specialization and craftsmanship that generic rebuilt units simply can't match.