Twisted Pro™ Ford C6 | Small Block Transmission

450–550 HP | 550 LB-FT | Performance Torque Converter Included

Our Twisted Pro™ Ford C6 is built in-house for small-block Ford street cars, muscle cars, classic trucks, and street/strip applications making up to 550 HP and 550 lb-ft of torque.

This build steps up from our Street C6 with increased clutch capacity, Kolene performance steels, upgraded drum assemblies, a billet intermediate servo, and performance valve body calibration for stronger holding power and firm, positive shifts.

Build Includes

• Increased-capacity heavy-duty performance clutch packs
• Kolene performance steels
• New heavy-duty carbon performance intermediate band
• Upgraded direct drum assembly
• Heavy-duty forward drum assembly
• Billet intermediate servo
• Heavy-duty one-way clutch assembly
• Complete new bushing kit
• Complete new thrust washer kit
• Remanufactured high-pressure pump assembly, modified and updated in-house
• TransGo 67-1&2 Performance Reprogramming Kit with Gear Command
• Valve body rebuilt, modified, and calibrated for street/strip use
• Updated governor assembly
• New vacuum modulator
• New transmission filter
• New gaskets, seals, and sealing rings

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

Torque Converter

Custom-built 13-inch performance torque converter included.

Standard Stall: 2100–2400 RPM

Converter selection is based on engine specifications, camshaft, rear gear ratio, tire size, vehicle weight, and intended use.

Higher-stall converters are available for more aggressive engine combinations.

Optional Performance Upgrades

• 2500–2800 RPM performance torque converter
• 2800–3200 RPM street/strip torque converter
• Anti-ballooning converter upgrade, where available for the selected converter
• 300M billet input shaft upgrade

For sticky tires, hard launches, nitrous, or heavier vehicles, contact us before ordering so we can review the build and determine whether additional upgrades are needed.

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 with performance calibration

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

The 351 Cleveland and 351 Windsor share the applicable small-block bellhousing pattern. The typical 351M and 400 engines use a different pattern. Rare early 400 configurations require verification.

Flexplate balance, tooth count, converter bolt pattern, and crankshaft pilot must match your engine.

Vehicle Applications

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

• Ford Mustang
• Mercury Cougar
• Ford Fairlane and 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 was factory-equipped with a small-block C6.

Confirm your application before ordering.

Custom Builds & Transmission Swaps

Building a Falcon, street rod, restomod, muscle car, or classic Ford truck?

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

Conversions may require changes to the crossmember, driveshaft, shifter linkage, kickdown linkage, speedometer connection, and exhaust clearance.

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

Stroker engines, power adders, sticky tires, and dedicated drag racing applications require a build review before ordering. Horsepower alone doesn't determine the correct transmission. Engine torque, vehicle weight, gearing, and intended use also matter.

Cooling & Installation

An external stacked-plate transmission cooler is required for this build. Cooler size must match the vehicle's weight, engine output, 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 full-manifold-vacuum source.
• Verify kickdown linkage operation and adjustment where applicable.
• Follow the supplied fluid, torque converter installation, and break-in instructions.

Questions About Your Build?

Tell us your engine, horsepower, cam specs, 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