TKX 5-Speed Transmission Package | Shelby CSX4000/6000 | Small Block Ford

TKX 5-Speed Transmission Package | Shelby CSX4000/6000 | Small Block Ford

TKX 5-Speed Transmission Package | Shelby CSX4000/6000 | Small Block Ford

Description

Key Features

  • 600 lb-ft torque capacity handles serious small block Ford power with safe shifts to 7,500 RPM
  • Three gear ratio configurations available: 3.27/1.98/1.34/1.00/0.72, 2.87/1.89/1.28/1.00/0.81, or 2.87/1.89/1.28/1.00/0.68
  • Side-shifted TKX places shifter through stock location to retain OEM Cobra appearance
  • 26-spline input shaft and 31-spline output shaft for maximum strength
  • Compact end-loaded case design minimizes floor pan modifications in aluminum-bodied CSX chassis
  • Complete hydraulic release bearing system eliminates mechanical linkage complexity
  • Direct bolt-in using TKO mounting locations for simplified installation
  • Premium flywheel options including aluminum, steel, and SFI-certified billet steel
  • Professional-grade clutch systems from McLeod, Centerforce, and Tilton
  • Sintered bronze and carbon hybrid synchronizer rings for smooth, precise shifts

Description

Your Shelby CSX4000/6000 427 S/C deserves a modern five-speed that matches its legendary performance. The TREMEC TKX represents the evolution of proven TKO engineering, purpose-built from the ground up for the aftermarket with a slimmer, stronger case that fits the tight confines of aluminum-bodied Cobra chassis while delivering 600 lb-ft of torque capacity and safe shifts to 7,500 RPM. Single overdrive reduces highway cruising RPM, increasing fuel efficiency and dramatically increasing smiles per mile.

TREMEC designed the TKX specifically to address the shift quality issues and high-RPM limitations of earlier transmissions. The three-piece aluminum housing with ribbed construction provides outstanding structural stiffness while the end-loaded design creates more tunnel clearance than previous five-speeds. Multi-cone synchronizers with sintered bronze and carbon hybrid rings eliminate the notchy, balky feel common in older gearboxes, delivering crisp, clean shifts even at high engine speeds. All gears and shafts are machined from special grade ASTM 4615 steel for increased torque carrying capacity.

This comprehensive package addresses every component needed for a complete drivetrain conversion. MDL's guided selection process walks you through transmission ratios, bellhousing configurations, flywheel materials, and clutch systems to match your specific engine combination and performance goals. The side-shifted TKX configuration places the shifter through the stock location, maintaining the authentic Cobra cockpit appearance while delivering 21st-century refinement. Whether you're building a weekend cruiser or a track-focused machine, this package provides the foundation for reliable power transfer that honors the Shelby legacy.

Each package includes a hydraulic release bearing system that provides consistent, effortless clutch operation while eliminating the maintenance headaches of mechanical linkages. All components are selected for compatibility with Ford small block applications and tested for the unique requirements of CSX-series Cobras. MDL offers concierge service to help you make the right part selections for your project and budget--feel free to contact us at any point during the build process.

What's Included

  • TREMEC TKX 5-speed transmission (choice of three gear ratio configurations)
  • Ford small block bellhousing (aluminum or steel construction options)
  • Hydraulic release bearing assembly
  • Braided stainless steel hydraulic line (-4AN, 12-inch)
  • Performance flywheel (aluminum, steel, or SFI-certified billet steel options with 157-tooth ring gear)
  • High-performance clutch system (McLeod, Centerforce, or Tilton options)
  • Flywheel mounting hardware (7/16-inch or 8mm ARP bolts)
  • Electronic speedometer sensor and drive
  • OEM-style shift lever (optional)
  • Shift knob options (optional)
  • Shift boot (optional)
  • Speedometer cable and drive gears (optional)
  • Custom driveshaft for CSX4000/6000 applications (optional)
  • TREMEC High Performance Manual Transmission Fluid (optional--3 quarts)
  • MDL lifetime technical support
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