TREMEC TKX 5-Speed Conversion Package | Ford Y-Block

TREMEC TKX 5-Speed Conversion Package | Ford Y-Block

TREMEC TKX 5-Speed Conversion Package | Ford Y-Block

Description

Key Features

  • TREMEC TKX 5-speed with 600 lb-ft torque capacity and 7,500 RPM shift capability
  • Compact end-loaded case design weighs just 99 lbs dry with 2.7-quart fluid capacity
  • QuickTime RM-8055 steel bellhousing engineered specifically for Ford Y-Block engines (239, 256, 272, 292, 312)
  • 26-spline input shaft with 31-spline output shaft for maximum strength
  • Multiple gear ratio options: wide-ratio (3.27:1 first) or close-ratio (2.87:1 first) configurations
  • Three-piece ribbed aluminum housing provides outstanding structural stiffness
  • Multi-cone synchronizers with hybrid sintered bronze/carbon rings for smooth high-RPM shifts
  • Fully customizable component selection - clutch kits, shifters, flywheels, and driveline components

Description

Ford Y-Block engines deserve a transmission that matches their legendary durability and performance potential. This complete TKX conversion package solves the challenge of upgrading from vintage three-speeds or automatic transmissions while delivering modern five-speed capability and single-overdrive efficiency. The TKX's compact end-loaded case design fits within narrow transmission tunnels - TREMEC engineered this case specifically for tight classic car confines, making it the ideal upgrade for Y-Block-powered classics where space is at a premium.

The engineering foundation starts with QuickTime's RM-8055 bellhousing, built from high-grade steel that work-hardens to over 80,000 PSI strength - more than twice the strength of other steel bellhousings. QuickTime cones are spun rather than rolled or stamped, delivering the most dimensionally stable bellhousing available and keeping engine-to-transmission alignment true throughout the entire RPM range. This bellhousing fits Ford Y-Block engines including the 239, 256, 272, 292, and 312 variants, accommodating an 11-inch clutch disc with hydraulic release and 164-tooth flywheel configuration.

The TKX delivers superior shift-ability through multi-cone synchronizers and hybrid synchronizer rings made of sintered bronze and carbon, enabling confident shifts at up to 7,500 RPM. Noise, vibration, and harshness performance is optimized with a gear layout that controls stress levels while providing structural stiffness through a ribbed three-piece aluminum housing. Durability is further enhanced with oversized gear widths, gaskets at all flanges, and caged needle bearings in all gear positions. All gears and shafts are made from special-grade ASTM 4615 steel for increased torque-carrying capacity.

Component selection flexibility allows builders to tailor the package for their specific application and performance goals. Choose from wide-ratio configurations with 3.27:1 first gear for street performance or close-ratio setups with 2.87:1 first gear for balanced acceleration. Multiple clutch options range from street-friendly to high-performance applications, with various shifter configurations to match your interior requirements. The TKX accepts readily available Dexron III ATF or TREMEC HP-MTF, simplifying maintenance. The 31-spline output uses a Ford C6-style slip yoke, with 1310, 1330, and 1350 U-joint options available. Made in the USA.

What's Included

  • TREMEC TKX 5-speed transmission (choice of gear ratios)
  • QuickTime RM-8055 steel bellhousing for Ford Y-Block applications
  • Bellhousing clutch fork
  • MDL billet steel flywheel (164-tooth, Y-Block bolt pattern)
  • ARP flywheel bolts
  • Clutch kit (multiple options available)
  • Pressure plate bolts (standard or ARP upgrade)
  • Shift knob and ball (various styles and finishes)
  • Thread adapters for shift knob installation
  • Shift lever (multiple positions available)
  • Shift boot (various materials and styles)
  • Speedometer driven gear and clip
  • Electronic speedometer sensor (optional)
  • Transmission fluid (Dexron III ATF or HP-MTF)
  • 31-spline slip yoke (1310, 1330, or 1350 U-joint sizes)
  • MDL lifetime technical support
Subtotal 0.00 0 selected
Final step

Review your build

Make sure everything looks right. Click Edit on any row to change a choice.

Package total 0.00