TKX 5-Speed Conversion Package | Mopar Big Block | Auto to Manual

TKX 5-Speed Conversion Package | Mopar Big Block | Auto to Manual

TKX 5-Speed Conversion Package | Mopar Big Block | Auto to Manual

Description

Key Features

  • 600 lb-ft torque capacity handles big block Mopar power with confidence
  • 8,000 RPM engine speed capability with shifts at 7,500 RPM for aggressive driving
  • 26-spline input shaft and 31-spline output shaft for maximum drivetrain strength
  • 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, 0.68/0.81)
  • Compact end-loaded case design fits most transmission tunnels without floor modifications
  • Cast aluminum bellhousing connects big block Mopar B/RB engines to Ford-pattern TKX
  • Compatible with 130 or 143 tooth flywheels and 10.5 or 11-inch clutches
  • Three factory shifter positions with optional custom offset shifters available
  • Complete customizable package - select flywheel balance, clutch kit, hydraulics, and driveline components for your specific build

Description

Ditch the slushbox and put a real transmission behind your Mopar big block. This complete TKX 5-speed conversion package transforms automatic-equipped 383, 400, 426, and 440 powered vehicles into proper driver's cars with a modern overdrive manual that handles over 600 lb-ft of torque. The single overdrive fifth gear reduces cruising RPMs, improves fuel economy, and - most importantly - delivers the engagement and control that made muscle cars legendary in the first place.

The TREMEC TKX represents a ground-up redesign built specifically for the aftermarket. Multi-cone synchronizers with hybrid sintered bronze and carbon rings deliver smooth, precise shifts even at 7,500 RPM - no notchy gates or missed gears when you're pushing hard. The three-piece ribbed aluminum housing provides structural stiffness while optimizing NVH performance, and gaskets at all flanges eliminate the fluid leaks that plague older designs. All gears and shafts are machined from special-grade ASTM 4615 steel for increased torque capacity, with oversized gear widths and caged needle bearings in all positions for extended durability.

The compact end-loaded case design is the TKX's secret weapon for Mopar swaps. TREMEC engineered the case specifically to fit tight transmission tunnels without cutting or hammering on your floor pan. The included cast aluminum bellhousing adapts big block Mopar engines to the Ford-pattern TKX, with dual starter mounting positions and compatibility with both 130 and 143 tooth flywheels. Whether you're running a mechanical fork or upgrading to hydraulic clutch actuation, this bellhousing accommodates your preference.

This package is fully customizable to match your build. Select from multiple flywheel balance configurations (383/400, 426, 440), clutch kit options ranging from street-friendly to high-performance, hydraulic master cylinder and line assemblies, custom shifters, speedometer components, transmission mounts, and 31-spline slip yokes in 1310, 1330, or 1350 U-joint configurations. MDL's package builder lets you spec exactly what your Mopar needs - no generic kits with parts that don't fit your application.

What's Included

  • TREMEC TKX 5-speed transmission with billet aluminum short-throw shifter (choice of gear ratios)
  • Cast aluminum bellhousing for big block Mopar B/RB engines with Ford-pattern transmission bolt pattern
  • Steel flywheel (choice of 383/400, 426, or 440 balance)
  • ARP flywheel bolts
  • High-performance clutch kit with 10.5-inch disc and pressure plate (multiple options available)
  • Pressure plate bolt kit
  • Hydraulic clutch master cylinder kit with mounting hardware
  • Braided stainless hydraulic clutch line
  • Custom shifter assembly with multiple shift lever options
  • Shift knob and thread adapter
  • Shift boot
  • Transmission mount
  • Speedometer gear, cable, and retaining clip (or electronic speedometer sensor)
  • Reverse light wiring harness
  • 31-spline slip yoke (choice of 1310, 1330, or 1350 U-joint series)
  • Transmission fluid (3 quarts)
  • Bellhousing-to-transmission hardware kit
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