THE TURBO 400: ENGINEERING EXCELLENCE DEFINED
The Turbo 400 (TH400/3L80) transmission, introduced by General Motors in 1964, stands as one of the most significant achievements in automotive transmission engineering. Originally developed for Cadillac and Buick's high-torque luxury applications, this robust three-speed automatic quickly earned its reputation as the industry's premier heavy-duty transmission. The TH400's overbuilt design, featuring a cast aluminum case and weighing approximately 135 pounds, incorporated innovative features like a robust planetary gear system, advanced clutch pack design, and an exceptionally strong input shaft that could handle tremendous torque loads straight from the factory.
Modern evolution has elevated the TH400 to legendary status in high-performance applications. While the basic architecture remains unchanged, today's aftermarket developments have pushed its capabilities far beyond the original design parameters. Contemporary builds regularly incorporate billet components, carbon fiber clutches, and specialized valve bodies capable of managing over 1,000 horsepower. The transmission's adaptability to electronic controls, combined with its inherent strength, has made it the go-to choice for everything from professional drag racing to high-performance street applications. Even in an era of overdrive transmissions, the TH400 remains the benchmark for ultimate durability, particularly in racing and heavy-duty applications where reliability under extreme conditions is paramount.
Turbo 400 Automatic Transmission Rebuild (TH400)
-
Carry Out TH400 (No Torque Converter) $1,950 Starting Price
Our professional TH400 rebuild includes complete disassembly, inspection, and reassembly with premium components including new clutches, steels, bushings, seals, bands, and gaskets. Each transmission receives our heavy-duty upgrade package featuring reinforced intermediate sprag, updated pressure regulator valve, and high-capacity filter. Perfect for shops and experienced installers requiring a reliable, high-performance transmission. (Core exchange required if not providing your own transmission). Includes our 12-month/12,000-mile limited warranty on soft parts.
CARRY-OUT REBUILD - Starting at $1,950+
(North Carolina Taxes are Additional)
-
Carry out TH400 (with Torque Converter) $2,150 Starting Price
Building on our premium rebuild package, this service includes everything in our carry-out rebuild plus a new performance-oriented torque converter (OEM stall standard). Package includes the fully rebuilt transmission, new torque converter, heavy-duty filter, and all required gaskets and seals. Ideal for complete drivetrain upgrades requiring both transmission and converter replacement. (Core exchange required if not providing your own units). Backed by our comprehensive 12-month/12,000-mile warranty covering labor, soft parts and converter.
CARRY-OUT WITH OEM TYPE CONVERTER - Starting at $2,150+
(North Carolina Taxes are Additional)
-
TH400 (TURN KEY) Pull it Tear Down Rebuild Install with T.C. & Fluid $2,550 Starting Price
Our flagship service includes professional removal and installation, premium synthetic fluid, complete vehicle integration, and thorough testing. This comprehensive package features our premium rebuild with performance converter, professional installation, all necessary parts and fluids, plus complete diagnostic testing and computer adaptation (where applicable). Each installation includes pan inspection at 10,000 miles and fluid level verification. Backed by our full 24-month/24,000-mile warranty covering soft parts and labor.
TURN-KEY INSTALLATION - Starting at $2,550+
(North Carolina Taxes are Additional)