Black Widow 600 (WHOLESALE)

At Next Level Engine & Transmission, the Black Widow 600 represents the perfect balance of performance and reliability. Designed for 68RFE-equipped trucks producing up to 600 horsepower, it’s the ideal choice for daily drivers, tow rigs, and moderately tuned builds that need dependable power without sacrificing longevity.

Each unit is handcrafted by a single master technician from start to finish, ensuring every component is assembled to exacting standards. Once complete, the technician personally signs the unit — a true mark of pride and craftsmanship that defines every Next Level build.

Whether you’re hauling heavy loads, commuting daily, or running a mild performance setup, the Black Widow 600 delivers the confidence and control to keep your truck running strong for the long haul.

Recommended For:

• Trucks producing up to 600 HP
  
• Heavy towing and moderate tuning applications
  
• Trucks running near-stock tire sizes (33”- 35”)
  
• Drivers who want a reliable, stronger-than-stock transmission
• This Transmission Features The Following:

Tear Down & Cleaning:

• The transmission is fully disassembled, and all soft, wear-prone parts are replaced with brand-new, high-quality components.
  
• Cases and housings are deep-cleaned in a 190° hot wash system to remove all residue and contaminants.
  
• Hard parts are hand-inspected and cleaned individually, with any questionable components replaced before reassembly.
  
• The case is thoroughly checked for cracks, wear, or damage to ensure a flawless foundation for the build.

Upgraded Internal Components:

• Next Level Transmission Multi Friction billet converter
• Next level 16 Clutch Overdrive Hub
• Next Level Transmission Heavy Duty Sprag
• Next Level High Performance Borg Warner Clutch Kit
• Extra Capacity Transmission Deep Pan
• Next Level Billet 4C snap ring retainer
• Next Level 2C Piston
• New Sonnax Pump Gear
• Next Level 2C Clutch Count Upgrade
• Next Level 4C Clutch Count Upgrade
• New OEM Line Pressure Sensor
• All New OEM seals and gaskets
• OEM Filter Kit
• Next Level High Pressure Tunable Valve Body
  • New OEM Solenoid pack
  • Billet Channel Plate
  • Billet accumulators, Performance SS Valve
  • High Performance Separator plate
• Tig Welded Output Planets
• Custom Next Level Paint Job

Tuner Information:

For the 68RFE Black Widow 600, the following settings should be used to properly tune the transmission:

• Line pressure set to 225 PSI above 30% throttle angle
  
• 100 PSI resting pressure
  
• No lockup until 4th gear
  
• Low/reverse sprag holdout enabled
  
• For 2019 and newer models, the under-drive pulse test must be turned off

Download 68RFE Installation Instructions HERE.

Warranty:

Includes: a 2-year / Unlimited miles warranty. 

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.