Circle D GM 245mm Pro Series 4L60 LT Torque Converter

Circle D Specialties GM 245mm Pro Series 4L60 LT Torque Converter

The Circle D Specialties GM 245mm Pro Series 4L60 LT Torque Converter is the ultimate sweet spot for enthusiasts who need serious holding power and instant throttle response for their LT-powered builds. Designed for heavily modified street cars and weekend track warriors equipped with a 4L60 transmission and an LT engine, this converter features a compact 245mm diameter. This smaller footprint drastically reduces rotational mass, allowing your engine to rev faster and flash instantly into its optimal powerband for explosive launches.

Delivering massive value and unshakeable strength, this Pro Series converter features a rigid billet front cover and billet piston, completely eliminating the flex and ballooning issues common with factory stamped covers. Inside, the assemblies are fully furnace brazed and hand TIG welded for maximum structural integrity. A flanged impeller hub ensures anti-flex durability, while the deep groove ball bearing design significantly extends clutch life. Hand-assembled to exacting tolerances, it delivers aggressive, reliable track performance while maintaining enough composure for weekend cruising.

Key Features

• Designed specifically for GM 4L60 transmissions paired with LT engines
• Compact 245mm diameter for reduced rotational mass and faster throttle response
• Rigid billet front cover and billet piston for maximum durability and zero ballooning
• Deep groove ball bearing design significantly extends clutch life
• Flanged impeller hub engineered for superior anti-flex durability
• Fully furnace brazed internals with hand TIG welded construction
• 27 Spline option available for 2004R and early 700R4 applications (Contact Us)
• Multiple stall speed options available (ranging from 3200 up to 4600 RPM)

Specifications

• Application: High-Performance Street/Strip Torque Converter
• Transmission Compatibility: GM 4L60 (27 Spline option for 2004R / Early 700R4)
• Engine Compatibility: LT
• Converter Diameter: 245mm
• Construction: Billet Front Cover, Furnace Brazed, Hand TIG Welded
• Bearings: Torrington Bearings & Deep Groove Ball Bearing
• Options: Multiple Stall Speeds and Lock-Up configurations available

Notes

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