Circle D Ford 252mm Pro Series 4R70 Torque Converter

Circle D Specialties Ford 252mm Pro Series 4R70 Torque Converter

The Circle D Specialties Ford 252mm Pro Series 4R70 Torque Converter is a top-tier, custom-built racing converter designed for extreme high-horsepower street and strip vehicles running a Ford 4R70 transmission. The highly compact 252mm diameter significantly reduces rotational mass for explosive throttle response while utilizing a premium CNC Machined Steel Stator. This allows for maximum stall adjustability and perfectly dialed-in launch characteristics tailored specifically to your build's powerband.

Engineered to survive the absolute limits of track abuse, this premium converter features a rigid billet front cover with multiple bolt pattern options, along with heavy-duty anti-balloon plates on both the pump and turbine to completely eliminate expansion under load. The internal assemblies are fully furnace brazed with hand TIG welded fins to maintain unshakeable structural integrity under massive torque loads. Equipped with a bulletproof Mechanical Diode one-way clutch, it offers absolute reliability for hardcore transbrake launches. For serious racers who need to make track-side stator adjustments or quick internal inspections, an optional Billet Steel Bolt-Together upgrade is also available.

Key Features & Upgrades

• Designed specifically for Ford 4R70 transmissions
• Compact 252mm diameter for reduced rotational mass and explosive throttle response
• CNC Machined Steel Stator offers maximum stall adjustability (Stall options from 3200 up to 5000 RPM)
• Rigid billet front cover with multiple bolt pattern configurations available
• Integrated Anti-Balloon Plates on both the pump and turbine
• Mechanical Diode one-way clutch for bulletproof transbrake reliability
• Optional Bolt-Together Upgrade: Available in Billet Steel for easy track-side maintenance and tuning
• Fully furnace brazed and hand TIG welded fins for maximum durability

Specifications

• Application: Extreme High-Performance Street/Strip/Race Torque Converter
• Transmission Compatibility: Ford 4R70
• Converter Diameter: 252mm
• Construction: Billet Front Cover, Furnace Brazed, Hand TIG Welded Fins
• Stator: CNC Machined Steel
• Options: Bolt-Together Housing, Lock-Up Configurations, Sprag Options, and Bolt Pattern Options

Notes

• Custom manufactured product built specifically to your build's exact specifications.
• Estimated lead time: 6 weeks.