TREMEC TKX 5-Speed Conversion Package | Sunbeam Tiger | Ford 5-Bolt Block

TREMEC TKX 5-Speed Conversion Package | Sunbeam Tiger | Ford 5-Bolt Block

TREMEC TKX 5-Speed Conversion Package | Sunbeam Tiger | Ford 5-Bolt Block

Description

Key Features

  • 600 lb-ft torque capacity with 8,000 RPM engine speed capability and 7,500 RPM shift points - handles serious power in a compact British roadster
  • Compact end-loaded case design fits Tiger tunnel without floor modifications - retains OEM shifter location for factory appearance
  • Multiple gear ratio configurations available - 3.27:1 or 2.87:1 first gear with 0.68, 0.72, or 0.81 overdrive ratios to match your rear axle gearing
  • 26-spline input shaft with 31-spline output shaft - substantially stronger than original Tiger four-speed drivetrain
  • Three-piece ribbed aluminum housing provides structural stiffness while minimizing NVH
  • Multi-cone synchronizers with sintered bronze and carbon hybrid rings deliver smooth, crisp shifts at high RPM
  • Fully customizable package - select transmission ratio, clutch kit, shifter components, driveshaft, and speedometer gearing for your specific build
  • Ford 5-bolt bellhousing pattern fits Tiger Mark I (260 cu in) and Mark II (289 cu in) engines

Description

The Sunbeam Tiger was Carroll Shelby's other V8 British roadster - a Ford small-block shoehorned into an Alpine with barely an inch to spare. That tight engine bay left Tiger owners with limited transmission options for decades. This TREMEC TKX conversion package solves the problem with a modern 5-speed that fits the Tiger's narrow tunnel without cutting sheetmetal, maintains the factory shifter position, and delivers the overdrive gear these cars desperately need for highway cruising.

The TKX was designed from the ground up as an aftermarket transmission, not adapted from OEM applications like previous five-speeds. TREMEC engineered the case specifically to clear tight transmission tunnels - exactly what Tiger builders need. The end-loaded design eliminates the bulky front section that plagued earlier conversions, while gaskets at all flanges simplify installation and prevent leaks. Inside, all gears and shafts are machined from ASTM 4615 special-grade steel, with caged needle bearings in all gear positions and oversized gear widths for durability under high-load shifts.

Power capacity far exceeds what any Tiger will realistically produce. The TKX handles 600 lb-ft of torque across all gear ratios - more than triple what a stock 260 or 289 generates. Engine speeds up to 8,000 RPM and shift points at 7,500 RPM mean this transmission won't be the limiting factor even in heavily modified builds. The high-performance short-throw billet aluminum shifter isolates road noise while delivering clean, precise shifts through the internal three-rail system with steel shift forks.

This package is engineered specifically for Sunbeam Tigers equipped with Ford 260 cu in (Mark I) or 289 cu in (Mark II) engines using the 5-bolt bellhousing pattern. MDL's guided package builder walks you through every component selection - transmission ratio, clutch configuration, speedometer gearing, driveshaft length, and crossmember fitment. TREMEC recommends HP-MTF fluid, though Dexron-III, GM Synchromesh, Mobil 1 Synthetic ATF, or Pennzoil Synchromesh are acceptable alternatives. Concierge service available for custom builds requiring specific performance parameters.

What's Included

  • TREMEC TKX 5-speed transmission with high-performance billet aluminum short-throw shifter (gear ratio selection required)
  • Ford 5-bolt bellhousing with Tiger-specific clearances
  • TKX-specific hardware kit with fasteners and gaskets
  • Clutch kit - pressure plate, disc, and throwout bearing (selection required)
  • Pressure plate mounting bolts (standard or ARP option)
  • Billet aluminum shift lever - 6.75-inch length
  • Shift knob and collar assembly
  • Leather shift boot
  • Mechanical speedometer cable
  • Speedometer driven gear (ratio selection required based on tire size and axle ratio)
  • Speedometer gear retaining clip
  • Electronic speedometer sensor (TKO-compatible output)
  • Tiger-specific crossmember
  • Transmission mount
  • TREMEC HP-MTF transmission fluid (3 quarts - 2.7 qt capacity with reserve)
  • Custom driveshaft (standard or shortened length options)
  • MDL lifetime technical support
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