Tremec TKX 5-Speed Transmission Modified For 63-67 C2 Corvette


Hanlon Modified Tremec TKX 5-Speed for 63-67 C2 Corvette’s



TREMEC is pleased to announce the release of the new TKX, a 5-speed RWD manual transmission developed solely for the aftermarket.

For the development of the new transmission, TREMEC engineers took a forward-looking approach to finding the best and most efficient solution. This included universal packaging, excellent shifting performance, and extreme durability.

The end result is superior shift-ability with smooth shifts at high RPMs through the use of multi-cone synchronizers and hybrid synchronizer rings. At the same time, noise, vibration and harshness (NVH) performance is optimized with a gear layout to best control stress levels, while providing structural stiffness with a ribbed, 3-piece aluminum housing. Durability is further optimized with oversized gear widths, gaskets at all flanges and caged needle bearings in all gear positions.

Whether restoring or upgrading a classic muscle car or a 1930s-era roadster coupe, the new TREMEC TKX 5-speed RWD manual transmission delivers a top-quality drivetrain solution.

If you’re looking for an easy way to add overdrive to your classic C2 Corvette, the Hanlon modified TKX is the perfect design for the swap.  With it’s streamlined case design and the removal of the mounting bosses on the lower section of the tail housing, there’s only this new shifter to be installed for an easy modification free swap. If your C2 Corvette is already equipped with a 4-speed you can retain the bellhousing, mechanical clutch linkage, and flywheel to simplify the swap and keep it within budget.


  • Hanlon Modified for C2 Corvette’s
  • Side Mount Shifter Modification Retains Factory Console Location
  • 600 lb.-ft. of torque capacity; capable of engines speeds of 8,000 RPMs with shifts at 7,500 RPMs.
  • Input Shaft – 26 Spline.
  • Output Shaft – 31 Spline.
  • Lightweight at 99 lbs dry.
  • Designed for multiple applications with three shifter locations.
  • Compact, end-loaded design provides clearance in most transmission tunnels without floor modifications.
  • Increased case strength with three-piece aluminum housing provides outstanding structural stiffness.
  • Gaskets at all flanges simplifies installation and eliminates fluid leaks.
  • Superior shift-ability through use of multi-cone synchronizers and hybrid synchronizer rings made of sintered bronze and carbon
  • All gears and shafts made from special grade steel (ASTM 4615), providing increased torque carrying capacity.
  • Equipped with a high-performance short-throw billet aluminum shifter that isolates road noise, while providing clean, crisp shifts.
  • Robust design with internal three-rail shift system and steel shift forks.

Gear Ratios:

Additional information

Weight 115 lbs
Dimensions 35 × 15 × 18 in


Available Transmission Ratio's

TCET17722 – 2.87 1ST Gear, .81OD, TCET17805 – 2.87 1ST Gear, .68OD, TCET18083 – 3.27 1ST Gear, .72OD