Turbo 400 Transmissions
Turbo 400 Transmissions
Over 30 Years of Experience | In Business Since 1991
Over 30 Years of Experience
Since the Early 2000
Get Top Performance With Turbo 400 Services
Get the latest technology and best possible parts available from family and locally owned Proformance Racing Transmissions. Our experienced pros are a leader in Turbo 400 transmission research and development with a never-ending pursuit to always improve on our championship-winning combinations.
Check out our large-shaft ST400s (super turbo) in both 3-speed and 2-speed versions. These 400s are now able to withstand the most brutal combinations from:
- Big CI Multi-Stage N2O
- Screw / Roots Blown Alky
- ProCharger Gas or Alky
- Big CI Twin Turbo Gas
- Twin Turbo Alky
Produce Staggering Results Without Sacrificing Reliability
TH400 Pro-Mod 3 Speed
Gear Ratios — 2.48/1.48 - 2.33/1.48 - 2.21/1.44 - 2.10/1.40 - 2.00/1.36 - 1.95/1.34 - 1.86/1.31
Gear Ratios — 2.48/1.48 - 2.33/1.48 - 2.21/1.44 - 2.10/1.40 - 2.00/1.36 - 1.95/1.34 - 1.86/1.31
TH400 Pro-Mod 2 Speed
Gear Ratios — 1.56 - 1.48 - 1.44 - 1.40 - 1.36 - 1.34 - 1.31
(Call for pricing and options)
Turbo 400 With Trans Brake
This transmission is available in 2-speed, 3-speed and 3-speed with 2nd-gear leaver. The 2nd-gear leaver option is something that can give you the best of both worlds. It can be used to race both 1/4 mile and 1/8 mile without major combination changes or it can be used as a tuning aid on tricky track surfaces or when conditions are just not that favorable.
2 Speed Turbo 400
This transmission has been tested in very extreme applications and has showed great results with unmatched performance and reliability. Our 2-speed 400's are built with all the same no corners cut process. This transmission has yet to reach its full potential as ever evolving technology has brought us to new levels of performance, so has the 2-speed 400!
3 Speed 400
Our full-race Turbo 400 starts with a hand-picked specific core. For models with an ultra-bell the case is cut and machined to our specs. For models with standard bells we only use H.D. cases to keep strength in all the critical areas and then machine them accordingly.
From there it's a long no-corners-cut process to build one of the best 3 speeds available. This is where our years of R&D are able to supply you with the best possible combination for your specific application. Our standard-race 400 w/brake is equipped with a cast iron transbrake valve body and can be upgraded to a billet aluminum transbrake valve body w/internal solenoid.
From there, all gear sets are completely checked and machined to our tolerances with all new Torrington bearings standard throughout. Base models will be equipped with a cast direct drum that is refurbished and fitted with an oversized sprag race, then drilled with additional feed holes.
We then completely modify the pump and lube circuit to our specifications. All of our transmissions get Raybestos, and Borg Warner clutches throughout. From this point is where the options begin.
Our Many, Many Options for You
- 4340 input shaft and drum assembly
- 4340 intermediate shift
- Billet aluminum direct drum
- 2.10/1.40 gear set
- 1.95/1.34 gear set
- 1.86/1.31 gear set
- 4T80/Northstar sprag drum assembly
- 4340 billet steel intermediate pressure plate
- Billet steel forward hub
- "Super Shaft" input shaft and drum assembly — available in cast, billet steel and billet aluminum billet turbo 400 drum assembly available in sprag and spragless, turbo 400 billet drum
- Alum. drum/super sprag set
- Steel drum/super sprag set
- JW ultra-bell
- Input shaft/drum and intermediate shafts options
- 300M input and drum
- 300M input and aluminum drum
- Aerospace shaft and drum
- Aerospace shaft and aluminum drum
- 300M intermediate shaft
- Aerospace intermediate shaft
Gear Set Options
- 2.10/1.40 4 pin helical
- 2.75/1.57 6 pin helical
- 2.98/1.56 straight cut
- 2.10/1.40 straight cut
- 1.86/1.31 straight cut
- 1.95/1.34 straight cut
Transmission Pan Options
- Cast aluminum pan
- Moroso fabricated pan
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