Twisted Street™ Ford C6 | Small Block Transmission

350–450 HP | Stock-Stall Torque Converter Included

Our Twisted Street™ Ford C6 is built in-house for small-block Ford street cars, classic trucks, and custom projects making up to 450 HP.

Built with high-energy clutches, heavy-duty steels, an updated one-way clutch, and a TransGo SK 6 Shift Kit, this C6 delivers firm, clean shifts with improved holding power while retaining normal automatic operation.

Build Includes

• Street-capacity high-energy clutch packs
• New heavy-duty steels
• New heavy-duty intermediate band
• Updated one-way roller clutch assembly
• Complete new bushing kit
• Complete new thrust washer kit
• New vacuum modulator
• New servo piston
• Remanufactured pump assembly, modified and updated in-house
• TransGo SK 6 Shift Kit — street calibration
• Valve body rebuilt, modified, and calibrated for street use
• New transmission filter
• New gaskets, seals, and sealing rings

Pump & Valve Body — Modified & Updated the Twisted Torque™ Way.

Torque Converter

Stock-stall torque converter included.

Higher-stall converters are available for modified engines. Converter selection depends on camshaft specifications, engine torque, rear gear ratio, tire size, vehicle weight, and intended use.

C6 Transmission Specifications

• Transmission: Ford C6
• Type: Three-speed automatic
• First gear: 2.46:1
• Second gear: 1.46:1
• Third gear: 1.00:1
• Converter: Non-lockup
• Overdrive: No
• Bellhousing: Integral small-block Ford pattern
• Shift operation: Automatic, standard forward shift pattern

Engine Applications

Built for the small-block Ford bellhousing pattern used on:

• 289 V8: Six-bolt blocks only
• 302 / 5.0L Windsor V8
• 351W / 5.8L Windsor V8
• 351C / 5.8L Cleveland V8
• 
  

Important: The 351 Cleveland and 351 Windsor share the applicable small-block bellhousing pattern. The typical 351M and 400 engines use a different pattern and are not direct-fit applications. Rare early 400 configurations require verification.

Flexplate balance, tooth count, converter bolt pattern, and crankshaft pilot must match your engine. Early and late 302/5.0L engines may have different external balance requirements.

Vehicle Applications

Built to order for properly matched small-block C6 applications, including:

• Ford Mustang
• Mercury Cougar
• Ford Fairlane
• Ford Torino
• Ford Ranchero
• Ford F-Series pickups
• Ford Bronco
• Ford Econoline vans

Fitment depends on the year, engine, original transmission, and drivetrain configuration. Not every vehicle listed came factory-equipped with a small-block C6.

Please confirm your application before ordering.

Custom Builds & Transmission Swaps

Working on a Falcon, street rod, restomod, classic truck, or small-block Ford swap?

We can help match the C6 and torque converter to your project, including conversions from a C4, FMX, or manual transmission.

Depending on the application, conversions may require changes to the crossmember, driveshaft, shifter linkage, kickdown linkage, speedometer connection, and exhaust clearance.

For 4WD applications, provide your transfer-case model so we can confirm the required output shaft and adapter configuration.

Stroker engines, nitrous, turbochargers, and superchargers require a build review before ordering. Engine torque, horsepower, vehicle weight, and intended use determine the correct transmission package.

Cooling & Installation

An external stacked-plate transmission cooler is required for this build. Cooler size must match the vehicle's weight and intended use.

• Flush or replace the existing cooler and transmission lines.
• Verify proper cooler flow before operating the transmission.
• Connect the vacuum modulator to a proper full-manifold-vacuum source.
• Verify kickdown linkage operation and adjustment where applicable.
• Follow the supplied fluid, converter installation, and break-in instructions.

Questions About Your Build?

Tell us your engine, horsepower, rear gears, tire size, and how you plan to use the vehicle. We'll help match the transmission and converter to your application.

Twisted Torque Inc.

833-858-9612

sales@twistedtorque.com