Black Widow Stage 4 Comp Build 1000+

The Black Widow Stage 4 47/48 from Next Level Engine & Transmission is built for those who demand the absolute best. Rated for 1,000+ horsepower, this transmission is purpose-built for competition, high-boost, and extreme-performance applications where reliability and precision are non-negotiable.

Each transmission is hand-built by a master technician using high-strength billet internals, reinforced clutch assemblies, and precision-tuned hydraulics. Once complete, the technician personally signs the unit — a mark of pride and craftsmanship that defines the Next Level standard.

Each valve body is custom configured to match the customer’s specific truck setup and individually tested prior to installation, ensuring optimal hydraulic performance, shift quality, and pressure control for every build.

The Black Widow Stage 4 is available with two stall converter options to match your setup:

• Stock Stall (1800–2000 RPM): Ideal for towing and daily use with strong low-end response.
  
• High Stall (2400–2600 RPM): Perfect for performance street and track builds requiring faster spool-up and higher launch power.

For drivers who want complete control, a full manual valve body is also available, giving you the ability to command every shift for maximum performance.

RECOMMENDED FOR:

• Trucks producing 1,000+ HP
  
• Competition and high-performance builds
  
• Extreme towing and high-boost applications
  
• Drivers who demand unmatched strength, control, and reliability
  

THIS TRANSMISSION FEATURES THE FOLLOWING:

UPGRADED INTERNAL COMPONENTS:

• Blacklist Triple Disc Converter - two stalls available: 
  • Stock (Tow/Daily 1800-2000 RPM) 
  • High (Street/Track 2400- 2600 RPM)
• GPZ Clutches and Steels 
• GPZ Power-packed overdrive with custom pressure plate 
• GPZ Power-packed Direct Drum with custom pressure plate 
• TCS servo, 
• Billet band strut, Billet wedge 
• Billet Accumulator 
• Billet 4.2 lever 
• Custom Built High Pressure Valve Body
• Sonnax or equivalent Billet Input shaft “35 spline” 
• Ridged 2nd gear band 
• H/D direct drum piston 
• Borg Warner Governor pressure solenoid 
• High pressure transducer 
• HD cast aluminum deep pan 
• Oversized output shaft  
• Custom high pressure valve body

WARRANTY:

Includes: a 1-year / unlimited miles warranty.  Refresh options available Yearly.

Important Notice: Trucks equipped with tires larger than 35 inches are not covered under warranty unless there is documented proof of a differential gear ratio change.

NOTE:

Next Level Engine & Transmission reserves the right to alter, update, or substitute build components and specifications at its discretion, without prior notice or obligation. These adjustments may be made to help customers meet specific timelines while maintaining the highest standards of quality, durability, and efficiency.

RETURNS:

*We accept returns within 10 days of receipt, as long as the transmission is in like-new condition and has not been installed. Please note that a 25% restocking fee applies, and customers are responsible for return shipping costs.