Turbo 400 Complete Transmission





Turbo 400 Complete Transmission

For over 40 years Transmission Specialties has been the trusted name in the performance automatic transmission industry. TSI has pioneered much of the technology that is 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.

Our “entry level” Turbo 400 transmission features many high-end items that other companies charge extra for. Assembled to the same exacting specifications as our top of the line transmissions, these units are without a doubt the best value for your money, while still providing you a transmission you can trust to put the power to the ground!

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 gets the highest quality product each and every time. This unit has undergone over 40 years of contiguous, 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.
  • Casing and housings are washed in our 190-degree hot wash tank.
  • Hard parts are thoroughly inspected and then either discarded or hand washed
  • Casing is thoroughly checked for any cracks or damage
  • Factory Casing is fully sand blasted

Upgrade Internal Components

  • 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
  • All new 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

Additional information

Transmission Type

Turbo 400

Fuel Type



GM / Chevrolet

Horse Power

850 HP, 1000 HP, 1200 HP, 1400 HP, 2000 HP, 2200 HP


Stock, SFI 2 Piece

Direct Drum

Stock Cast Iron, Billet Aluminum Pro Mod, Billet Steel Pro Mod

Input Shaft

Stock, 300M Billet Stock Diameter, Aermet 100 Stock Diameter

Main Shaft

Stock, 300M Billet Stock Diameter, Aermet 100 Stock Diameter

Output Shaft

Stock, 300M Billet

Valve Body

Case Iron, Reverse Pattern Manual, 3 Speed, Billet Aluminum, Reverse Pattern, Trans Brake, 3 Speed, Billet Aluminum, Reverse Pattern, Trans Brake, 2 Speed

Planetary Gearset Ratio

2.48-1.48-1.0, 1.48-1.0


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