TREMEC TKX 5-Speed Transmission Package | Chevy LS

TREMEC TKX 5-Speed Transmission Package | Chevy LS

TREMEC TKX 5-Speed Transmission Package | Chevy LS

Description

Key Features

  • 600 lb-ft torque capacity with 7,500 RPM shift capability and 8,000 RPM engine speed rating
  • 26-spline input shaft with 31-spline output shaft for maximum drivetrain strength
  • Fully customizable package builder - select transmission, bellhousing, clutch, flywheel, shifter, and accessories
  • Compact end-loading case design fits GM A-bodies without tunnel modifications
  • Multi-cone synchronizers with sintered bronze and carbon hybrid rings for smooth high-RPM shifts
  • All gears and shafts machined from ASTM 4615 special-grade steel for increased torque capacity
  • Three gear ratio configurations available: wide-ratio (3.27 first/0.72 OD) and close-ratio (2.87 first with 0.68 or 0.81 OD)
  • Bolts directly to GM 3-speed and 4-speed Muncie/Richmond bellhousing patterns
  • Concierge selection service with expert tech support included

Description

Building an LS-powered restomod or street machine demands more than random parts - it requires a transmission package engineered specifically for your combination. The TREMEC TKX represents the first 5-speed designed from the ground up exclusively for the aftermarket, delivering 600 lb-ft of torque capacity with shifts at up to 7,500 RPM. This isn't a recycled OEM unit - it's purpose-built for builders who expect modern performance in classic sheetmetal.

TREMEC designed the TKX case specifically to fit within narrow transmission tunnels like the '68-'72 Chevelle. The end-loading architecture reduces case height and eliminates the torque arm mount found on older TKOs, fitting GM A-bodies - Chevelle, GTO, Cutlass, Nova, Camaro, and many others - without cutting or modifying your tunnel. A ribbed, 3-piece aluminum housing (main case, intermediate plate, and extension housing) provides structural stiffness while reducing NVH. Gaskets at all flanges simplify installation and eliminate fluid leaks.

Superior shift quality comes from multi-cone, strut-type synchronizers with hybrid sintered bronze and carbon rings. Ball detents on each of the three shift rails deliver precise, positive engagement, while internal interlocks prevent gear clashing at high RPM. The robust internal three-rail shift system uses steel shift forks, and the included high-performance short-throw billet aluminum shifter isolates road noise while providing crisp, mechanical feedback.

MDL's guided package selection lets you build exactly what your project needs. Choose from multiple TKX ratio configurations, bellhousing options for mechanical or hydraulic clutch release, LS-specific flywheels matched to your crankshaft bolt pattern, clutch packages rated for your power level, shifter positions and styles, and all supporting components. Every combination is validated for compatibility. The TKX accepts Dexron III ATF or TREMEC HP-MTF with a 2.7-quart capacity. Technical support and installation guidance included with every package.

What's Included

  • TREMEC TKX 5-speed transmission (gear ratio based on selection)
  • Bellhousing (aluminum standard or SFI-rated options available)
  • Hardware kit with Grade 8 bolts and installation components
  • Billet steel flywheel matched to LS variant and clutch selection
  • Flywheel bolts (standard or ARP upgrade available)
  • Complete clutch set (pressure plate, disc, release bearing)
  • Hydraulic master cylinder kit (if hydraulic option selected)
  • Shift lever (custom MDL offset or Hurst options with multiple positions)
  • Shift knob and boot selection
  • Speedometer adapter or electronic sensor based on application
  • Reverse light wiring harness
  • Transmission fluid (3-quart capacity)
  • 31-spline slip yoke (based on U-joint series selection)
  • Complete installation instructions and lifetime tech support access
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