TREMEC TKX 5-Speed Conversion Package | 1964-1966 Chevelle | LS Engine

TREMEC TKX 5-Speed Conversion Package | 1964-1966 Chevelle | LS Engine

TREMEC TKX 5-Speed Conversion Package | 1964-1966 Chevelle | LS Engine

Description

Key Features

  • Complete customizable conversion package for LS-powered 1964-1966 Chevelle builds
  • TREMEC TKX 5-speed rated at 600 lb-ft torque capacity with 7,500 RPM shift capability
  • Compact end-loading case design fits early Chevelle tunnels without modifications
  • Three gear ratio options: wide ratio (3.27:1 first), close ratio (2.87:1 first), and deep overdrive (0.68 fifth) variants
  • 26-spline input shaft and 31-spline output shaft for enhanced drivetrain strength
  • Bolts to GM Muncie 3 & 4-speed bellhousing pattern for simplified installation
  • Guided package builder walks you through component selection for LS-specific fitment
  • 99 lbs dry weight with 2.7-quart fluid capacity

Description

Give your LS-swapped '64-'66 Chevelle a modern 5-speed manual without hacking up the tunnel. The TREMEC TKX was designed from the ground up as an aftermarket transmission, and its compact end-loading case architecture solves the clearance problems that plagued earlier 5-speed swaps in A-body applications. TREMEC specifically engineered the TKX case profile to fit the narrow confines of Chevelle tunnels, meaning your first-generation A-body gets a direct bolt-in solution.

The TKX delivers 600 lb-ft of torque capacity through special-grade ASTM 4615 steel gears and shafts, a single-piece countershaft, and tapered roller bearings on the input, output, and counter shafts. Multi-cone synchronizers with hybrid sintered bronze and carbon rings enable crisp, smooth shifts at engine speeds up to 7,500 RPM, eliminating the notchy, balky feel of older designs. Three shifter mounting locations and an included high-performance short-throw billet aluminum shifter give you flexibility in positioning.

This fully customizable package includes every component needed for a complete LS-to-TKX conversion. Choose from multiple gear ratio configurations: the wide-ratio version (3.27, 1.98, 1.34, 1.00, 0.72) provides maximum launch capability, while close-ratio options (2.87, 1.89, 1.28, 1.00, 0.68 or 0.81) deliver tighter spacing for spirited driving. The guided package builder walks you through selecting LS-compatible bellhousings, flywheels, clutch kits, hydraulic release systems, shifter components, speedometer solutions, and driveline hardware.

The 26-spline input shaft mates with LS-specific clutch discs, while the 31-spline output shaft accepts Ford C6-style slip yokes in 1310, 1330, or 1350 U-joint configurations. GM-pattern pilot tip (0.590-inch) and 1.375-inch OD throwout bearing guide tube ensure proper fitment with LS engine applications. Lubricant options include TREMEC HP-MTF, Dexron-III, GM Synchromesh, Mobil 1 Synthetic ATF, or Amsoil ATF.

Package Components Available

  • TREMEC TKX 5-speed transmission - multiple gear ratio configurations (wide ratio, close ratio, deep overdrive)
  • Hydraulic or mechanical bellhousings - LS-specific bolt patterns
  • Installation hardware kits - aluminum or steel options
  • LS-compatible billet steel flywheels - various balance configurations
  • Flywheel bolts - standard and ARP upgrade options
  • Performance clutch sets - 26-spline, single and dual-disc applications
  • Pressure plate bolts - standard and ARP options
  • Hydraulic clutch pedal assemblies
  • Pedal pad kits - dual-bore and manual brake configurations
  • Hydraulic master cylinder kits - multiple bore sizes and colors
  • Hydraulic release bearings - bolt-on LS application
  • Braided stainless hydraulic lines
  • Shift knobs and thread adapters - multiple finishes and thread configurations
  • Custom and Hurst shift levers
  • Shift boots - round and rectangle base options
  • Speedometer cable adapters and driven gears (16-21 tooth options)
  • Electronic speedometer sensors
  • Transmission oil - 3 quarts recommended
  • Reverse light wiring harness
  • Chevelle-specific transmission mount
  • 31-spline slip yokes - 1310, 1330, and 1350 U-joint configurations
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