TH350 TH400 Night Stalker Series 200 RPM Over Stock Towing GM Torque Converter Part Number 4701HD

GM TH350/TH400 PG - 30 Spline Night Stalker Series Torque Converter

Achieve optimal performance and reliability with our precision-machined Night Stalker Series torque converter, specifically designed for GM TH350 and TH400 transmissions. This robust unit provides exceptional durability and handles high-performance applications, making it the perfect match for your upgraded drivetrain setup.

Our converters are built using quality materials and undergo rigorous testing to ensure they meet high-performance demands while offering a classic, heavy-duty build quality. This model is factory matched to the TH400 when paired with the proper Flex-Plate.

Key Specifications

• Torque Converter Series: Night Stalker Series
• Transmission Compatibility: GM TH350/TH400 PG
• Part Number: 4701HD
• Spline Count: 30 Spline Turbine Hub
• Stall Range: 200 - 300 RPM (Over Stock performance)
• Core Diameter: Factory 12 inch Core
• Bolt Circle Diameter: 10.75 inches
• Impeller Hub: Hardened Chrome Moley, Precision CNC Machined
• Bearings: Torrington Style Incased Bearings
• Stator: Modified Extreme Duty Stator, Digitally Balanced
• Crank Pilot: 1.703 inch
• Bolt Size: 10mm X 1.5 Pitch Threads Class 10 or Stronger
• Additional Features: No Anti-Balloon Plate, Four Corner Tac Welded Fins or Furnace-Brazed

Installation & Performance Notes

• Will NOT interchange with the TH350C.
• All advertised stall ranges are based on a specific vehicle setup and will vary depending on your installation. Please contact us for precise matching information.

Maintenance & Setup Advice

• For best performance, use Type F transmission fluid.
• Apply Blue Loctite for proper assembly and retention of components.

Upgrade Recommendation: If you have upgraded two or more drivetrain items (such as Intake, Heads, Headers, Exhaust, Cam, or Gearing), consider upgrading to our "Street Bandit Series" torque converter. For extreme power adders (Nitrous, Turbocharger, Supercharger, or Trans Brake), upgrade to the "Out Law Racing Series."

Building high performance and racing converters since 1970. We are a veteran-owned and family-run business dedicated to quality.