TKX 5-Speed Conversion Package | 1968-1972 Nova | LS Engine

TKX 5-Speed Conversion Package | 1968-1972 Nova | LS Engine

TKX 5-Speed Conversion Package | 1968-1972 Nova | LS Engine

Description

Key Features

  • TREMEC TKX 5-speed transmission rated at 600 lb-ft torque capacity with 7,500 RPM shift capability
  • Multiple gear ratio options: 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-loading case design fits '68-'72 Nova X-body tunnel without modifications
  • 26-spline input shaft and 31-spline output shaft for maximum strength
  • Three-piece ribbed aluminum housing provides structural stiffness and reduced NVH
  • Sintered bronze and carbon hybrid synchronizer rings for smooth, high-RPM shifts
  • Bolts directly to GM Muncie/Richmond-pattern bellhousings
  • Complete hydraulic clutch system options eliminate mechanical linkage complexity
  • Custom MDL shifter maintains factory-look shifter positioning

Description

Drop LS power into your '68-'72 Nova with a transmission engineered specifically for the swap. MDL's complete TKX conversion package solves the fundamental challenge of fitting a modern 5-speed into a classic X-body: the narrow, shallow transmission tunnel that forced earlier swaps to require sheet metal surgery. TREMEC designed the TKX case from the ground up for the aftermarket, specifically targeting the tight confines of GM A-body and X-body tunnels. The result is a 5-speed that slides into your Nova without cutting or bashing the floorpan.

The TKX delivers where it counts. The 600 lb-ft torque capacity handles serious LS power, while the 7,500 RPM shift rating means you can wind it out without worrying about synchro damage. Multi-cone synchronizers with sintered bronze and carbon hybrid rings provide that crisp, modern shift feel that older 5-speeds simply cannot match. The three-piece ribbed aluminum housing adds structural stiffness while minimizing noise, vibration, and harshness. Gaskets at all flanges mean leak-free installation and long-term reliability.

This package goes beyond just the transmission. MDL has engineered a complete system with matched components: bellhousing options for both aluminum and steel preferences, hydraulic clutch assemblies that eliminate the headache of adapting cable or mechanical linkage, custom crossmembers for proper mounting, and shifter solutions that maintain the factory look inside the cabin. The 31-spline output shaft uses Ford C6-style slip yokes, so you will need to address driveshaft length in your build plan. Fluid capacity is 2.7 quarts, with TREMEC HP-MTF, GM Synchromesh, or Dexron III ATF recommended.

MDL's guided package builder walks you through every component selection for your specific Nova project. Whether you are building a weekend cruiser or a high-output street machine, you can configure the gear ratios, clutch capacity, and hydraulic components to match your goals. Lifetime tech support means you are never left guessing during the install.

What's Included

  • TREMEC TKX 5-speed transmission (gear ratio selection required)
  • MDL custom billet aluminum shifter
  • Bellhousing (aluminum hydraulic or steel options)
  • Transmission-to-bellhousing installation hardware kit
  • Flywheel bolt set (thread pitch options available)
  • Clutch kit (multiple performance levels available)
  • Pilot bearing for LS crankshaft
  • Hydraulic clutch pedal assembly
  • Pedal pad kit
  • Hydraulic master cylinder kit with reservoir
  • Stainless steel hydraulic line
  • Hydraulic release bearing assembly
  • Shift knob (finish options available)
  • Custom shift lever
  • Shift boot
  • Speedometer cable adapter and driven gear
  • Electronic speedometer sensor
  • Reverse light wiring harness
  • Custom Nova crossmember
  • Transmission mount
  • TREMEC HP-MTF or ATF transmission fluid (3 quarts)
  • 31-spline slip yoke (U-joint series options: 1310, 1330, or 1350)
  • Lifetime technical support
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