Circle D Ford 265mm Pro Series 4R70 Torque Converter

Circle D Specialties Ford 265mm Pro Series 4R70 Torque Converter

The Circle D Specialties Ford 265mm Pro Series 4R70 Torque Converter is a highly versatile, high-performance upgrade for enthusiasts running a Ford 4R70 transmission in their modified street or strip vehicle. The 265mm (10.5-inch) diameter offers the ultimate sweet spot—significantly reducing rotational mass for rapid throttle response and quick acceleration, while maintaining slightly more surface area than our 245mm and 258mm options for exceptional streetability and efficient torque transfer.

Engineered to deliver massive value and handle serious power, this Pro Series converter features a rigid billet front cover and a billet lockup piston, completely eliminating the flex and ballooning issues common with stamped factory components. It boasts a massive 100 square inches of clutch lining, providing unmatched holding capacity for wide-open throttle (WOT) lock-up. Inside, a flanged impeller hub ensures superior anti-flex durability, while the internal assemblies are fully furnace brazed and hand TIG welded for maximum structural integrity under heavy torque loads. Hand-assembled to exacting tolerances, this converter delivers dominant track performance while remaining incredibly strong and reliable.

Key Features

• Designed specifically for Ford 4R70 transmissions
• 265mm (10 1/2") diameter delivers a superior balance of rapid engine response and streetable torque holding
• 100 Square inches of Clutch Lining for extreme WOT Lock-Up holding capacity
• Rigid one-piece billet front cover and billet lockup piston prevent flexing and ballooning
• Flanged impeller hub engineered for superior anti-flex durability
• Fully furnace brazed internals with hand TIG welded construction
• Heavy-duty Torrington style bearings for smooth, reliable operation
• Hand-assembled to exacting tolerances for dominant track performance

Specifications

• Application: High-Performance Street/Strip Torque Converter
• Transmission Compatibility: Ford 4R70
• Converter Diameter: 265mm (10 1/2")
• Construction: Billet Front Cover & Piston, Furnace Brazed, Hand TIG Welded
• Bearings: Torrington Style Bearings
• Options: Multiple Stall Speeds (2500 up to 3400 RPM), Lock-Up Configurations, and Sprag Options available

Notes

• Custom manufactured product built to your exact specifications.
• Estimated lead time: 3-4 weeks.