TSI TH400 Complete Transmission – 1200HP – 2.48 Gear – SFI One Piece Case

For over 40 years Transmission Specialties has been the trusted name in the performance automatic transmission industry. TSI has pioneered much of the technology now commonplace in the transmission marketplace. The inventors of the spragless converter and the aftermarket Powerglide planetary, TSI is known worldwide for manufacturing and assembling the highest quality transmissions and components.

Unlike many production builders, our transmissions are handcrafted from beginning to end by one highly skilled and experienced technician. This process ensures that you the customer get the highest quality product each and every time. This unit has undergone over 40 years of continuous, rigorous R&D and on-track testing.

Designed, Engineered, and Assembled in the USA at our state-of-the-art Philadelphia, PA facility.

Disassembly Process and Cleaning

• Complete disassembly of the entire transmission, all wearable “soft parts” are discarded.
• The casing and housings are washed in our 190-degree hot wash tank.
• Hard parts are thoroughly inspected and then either discarded or hand washed
• Upgrade Internal Components

Options and Upgrades

• TSI SFI Two Piece Cast Aluminum Case or OEM Inspected Case
• Choice of Stock or Billet 300M, Aermet Input Shaft
• Choice of Stock or Billet 300M, Aermet Main Shaft
• Choice of Stock or Billet 300M, Output Shaft
• Choice of Stock or Billet Steel, Aluminum Direct Drum
• Choice of 34 or 36 Element Intermediate Sprag
• Choice of Stock or Billet Reverse Manual Valve Body
• Two or Three Speed Option
• 3/4/5 Intermediate Clutch Option
• Rollerized or Bushing Tail Housing
• All new bearings and bushings
• Alto Red Eagle Clutches
• OEM or Aftermarket Pump
• All New External Fasteners
• Deep Aluminum Pan w Drain Plug
• All New Gaskets and Seals
• Endplay and Clearances Set to Exacting TSI Performance Specifications