Tremec TKX


Tremec’s new 5-speed Powerhouse
With a sleek all-new case.


MDL offers complete TKX 5-speed packages that are completely customizable.

We have many in stock and ready to ship




TKX in green overlaid with TKO in blue

TKX in green overlaid with TKO in blue

ALL NEW Endloading design which means:

  • Greater Strength   
  • The slimmest 5-speed on the market for improved tunnel clearance is shown in the image to the left TKX – in green / TKO-in blue
  • Fits GM A-bodies without tunnel modification Chevelle, GTO, 442, as well as Nova, Chevy II, and many more.




TKX / T5 Overlay



More on the New Slim Case design & tunnel clearance
shown the image to the left
TKX – in green / T5-in blue


Click here to see shop shots of TKX disassembled

Sintered carbon + bronze-Hybrid double-cone synchros with a non-leading edge profile direct from the T56 Magnum allowing for up to 8000 RPM shifts


  • The all-new 5-speed, single overdrive manual transmission from TREMEC. Designed, tested, and built specifically for the aftermarket.
  • The TKX has 600 lb.-ft. of torque capacity and is capable  of 8,000 RPMs shifts
    and is available in multiple gear ratio configurations (See chart below).
  • Designed for multiple applications with three shifter locations. A 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 (includes main case, intermediate plate, and rear extension) Gaskets at all flanges simplify installation and eliminate fluid leaks.
  • Superior shift-ability through the use of multi-cone synchronizers and hybrid synchronizer rings made of sintered bronze and carbon
  • Noise, vibration, and harshness (NVH) are minimized with gear layout to best control stress levels.
  • All gears are supported by caged needle bearings to reduce end play on the gears.
  • All gears and shafts are 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.
  • Wide gear width increases gear life and torque capacity.
  • 26-spline input shaft with a 31-spline output shaft for added strength.
  • Built-in reverse light switch and cruise control safety switch.
  • Available in GM 3 & 4 speed Muncie/Richmond pattern
  • Available in Ford wide pattern 3-4 speed pattern


TKX for the Generations: Article by Jim Smart



V8 Speed & Resto Shop talks about classic muscle & the Tremec TKX

Ep.1 of a 5 part Series| MDL Modified Shift Position TKX install into 67 Chevelle SS

Far and away, the most versatile 5-speed on the market.

TREMEC’s TKX the latest innovation to the series of 5-speed transmissions that began with its successful TKO in the 5-liter Mustang movement and has since been fitted into nearly every rear-wheel drive performance application imaginable.



Serving up 600 lb-ft of torque capacity, along with up to 8000 rpm confidence-inspiring shifts and fuel-saving overdrive.

The TKX offers an ideal blend of brute strength and street manners.

Welcome to the next generation.


TREMEC Elite logo