4L60E 4L65E 4L70E 300mm LS Night Stalker 200 RPM Over Stock Lock Up Towing GM Torque Converter Part Number 4945HD

Torque Converter - NIGHT STALKER Series (300mm) for LS Engines

Power your high-performance LS engine with our premium NIGHT STALKER Series Torque Converter. Designed for compatibility with GM 4L60E, 4L65E, and 4L70E transmissions, this converter delivers reliable performance under extreme conditions. Factory quality controlled and built to withstand high torque loads, it ensures seamless power transfer for your build.

Key Product Details

• Transmission Type: 4L60E, 4L65E, 4L70E
• Series: NIGHT STALKER Series
• Part Number: 4945HD
• Stall Range: 200 - 300 RPM (Over Stock)
• Size: 300mm / 12 inch Core

Technical Specifications

• Input Shaft: 30 Spline Input Shaft
• Hub Material: Hardened Chrome Moly Impeller Hub
• Bearings: Torrington Style Bearings
• Stator Design: Modified Heavy-Duty Stator
• Lockup: Extreme Duty Lock Up
• Crank Pilot: Factory 1.703 inch Pilot
• Bolt Circle Diameter: 11.063 inches (Factory Bolt Circle)
• Bolt Size: 10MM X 1.5 Pitch Class 10
• Additional Features: Anti-Balloon Plates, Digitally Balanced, Leak & Pressure Tested
• Manufacturing: Made in the USA

Installation and Performance Notes

• For best performance, use Type F transmission fluid.
• Always install a transmission cooler for added protection.
• Apply Blue Loctite during assembly.

Assembly and Application Guidance

• All advertised stall speeds are based on specific vehicle setups; ranges will vary depending on your application.
• Contact us for personalized consultation regarding stall speeds or setup information at 888-267-7464.
• If you have upgraded your intake, heads, headers, exhaust, cam, or gearing, we recommend considering a "Street Bandit Series" upgrade.
• If your build includes power adders such as Nitrous Oxide (NOS), Turbocharger(s), Supercharger, or a Trans Brake, we recommend the "Out Law Series."

Building high performance and racing converters since 1970. We are a veteran and family-owned company committed to quality.