TREMEC TKX 5-Speed Conversion Package | Shelby CSX4000/CSX6000 Small Block Ford

TREMEC TKX 5-Speed Conversion Package | Shelby CSX4000/CSX6000 Small Block Ford

TREMEC TKX 5-Speed Conversion Package | Shelby CSX4000/CSX6000 Small Block Ford

Description

Key Features

  • 600 lb-ft torque capacity with 8,000 RPM capability and 7,500 RPM shift points
  • Multiple gear ratio configurations: wide ratio (3.27, 1.98, 1.34, 1.00, 0.72) or close ratio (2.87, 1.89, 1.28, 1.00) with 0.68 or 0.81 overdrive options
  • 26-spline input shaft with 31-spline output shaft for added strength
  • Compact end-loaded case design fits tight Cobra transmission tunnels without modifications
  • Side-shift configuration places shifter through stock location for OEM appearance
  • Three-piece ribbed aluminum housing provides outstanding structural stiffness
  • Sintered bronze and carbon hybrid synchronizer rings deliver smooth high-RPM shifts
  • Complete guided package selection with professional concierge service

Description

Give your Shelby CSX4000 or CSX6000 continuation Cobra the modern drivetrain it deserves. This custom TREMEC TKX 5-speed conversion package solves the challenge of mating contemporary transmission technology to these legendary machines while preserving the authentic driving experience Carroll Shelby intended. With 600 lb-ft of torque capacity, the TKX handles anything a Small Block Ford can throw at it - from mild 302s to built 351 Windsors pushing serious horsepower.

TREMEC designed the TKX specifically for the aftermarket, creating a compact solution for builders who want five-speed convenience without the bulk of a T56 Magnum. The end-loaded case architecture and streamlined profile slide into the Cobra's tight transmission tunnel, and the side-shift design positions the lever through your stock shifter location - maintaining that unmistakable Shelby cockpit feel. All gears and shafts are machined from special-grade ASTM 4615 steel for maximum durability, while multi-cone synchronizers with hybrid sintered bronze and carbon rings deliver crisp, positive shifts even at 7,500 RPM.

Every MDL TKX package is engineered around your specific build. Our guided selection process walks you through bellhousing options, external hydraulic slave cylinder systems, flywheel choices (steel, aluminum, or carbon steel in various balance configurations), shifters, speedometer solutions, and CSX-specific driveshafts. Choose between wide ratio gearing for street-focused builds or close ratio for spirited driving, with overdrive options from 0.68 to 0.81 to optimize your highway cruising RPM. Three quarts of TREMEC HP-MTF or ATF complete the package.

When you choose an MDL conversion package, you get more than parts in boxes. Our team provides professional concierge service to help you select the right components for your project and budget, backed by lifetime technical support. Whether you're building a weekend cruiser or a track-day weapon, this package delivers the reliability, shift quality, and performance the CSX4000/CSX6000 platform demands.

Kit Includes

  • TREMEC TKX 5-speed transmission (choice of gear ratios and overdrive configurations)
  • Ford-pattern bellhousing (aluminum or steel options)
  • Bellhousing hardware kit (aluminum or steel fasteners)
  • External hydraulic slave cylinder kit
  • Bellhousing clutch fork
  • Flywheel (carbon steel, billet steel, or aluminum options with 0-balance, 28 oz-in, or 50 oz-in configurations)
  • Pressure plate bolt kit (standard or ARP)
  • OEM-style shift lever
  • Shift knob (black or polished options)
  • Shift boot
  • Speedometer cable
  • Speedometer driven gear (16-21 tooth options based on rear axle ratio)
  • Speedometer gear retaining clip
  • Electronic speedometer sensor
  • Transmission fluid (3 quarts HP-MTF or ATF)
  • CSX4000/CSX6000-specific driveshaft
  • Lifetime technical support
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