Watch Robert Hall of American Powertrain and Chad Reynolds of go over the new TKX

The New TREMEC TKX is the new 5-speed in town. TREMEC has normally sourced their aftermarket transmissions from the OE side, such as the Magnum T-56 and the T-5. This brand new design is made from the ground up as a strictly aftermarket transmission. Designed to fit classic muscle cars and customs, the TKX has a tighter, more streamlined case.

TKX 5-Speed Manual Transmission Features and Benefits

  • The TKX has 600 lb.-ft. of torque capacity and is capable of engines speeds of 8,000 RPMs with shifts at 7,500 RPMs. It is available in multiple gear ratio configurations (See chart below).
  • 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 (includes main case, intermediate plate and rear extension). 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
  • Noise, vibration and harshness (NVH) minimized with gear layout to best control stress levels. All gears supported by caged needle bearings to reduce end play on the gears.
  • 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.
  • 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.
  • Separate GM and Ford case patterns and input configurations. Integrated GM and Ford transmission mount patterns.

American Powertrain can also provide a mid-shift conversion, as well as a White Lightning shifter. The White Lightning Shifter features over 60 additional shifter locations to help get the new TKX set up for your muscle car, truck or custom project. American Powertrain will also have a direct fit version for Classic Corvettes and Mopars, which feature a 12-month/12,000-mile warranty backed up even further with American Powertrain’s two year warranty. Check out the images below and the new TKX Gear Ratio Chart….

TKX Gear Ratio Chart

Check out the rendering from Tremec showing the size differences in the TKX, TKO and T-5. TKX is in green.

We are taking orders for the TKX now. They will be shipping from TREMEC around Nov. 30th. Call us at 931-646-4836 to get your order in line. Click here for more.

The TKX with more streamline case
TKX top view.
TKX electronic speedometer output and VSS output

Corvette C1 C2 and C3 version coming soon!

TKX with the American Powertrain Corvette C2 Pro-Fit conversion
TKX with the American Powertrain Corvette C2 Pro-Fit conversion
TKX with American Powertrain Mid-shift conversion

257 thoughts on “The New TREMEC TKX

        1. Honestly we do not really know yet as we have not had time to fit the TKX to all the applications since TREMEC just came out with it. TKO you have to cut the floor for sure. TKX is smaller but A-body mopar has a really small tunnel. So to be safe I can’t tell you yet you wont have to modify the floor until we get all our engineering done.

    1. We have all that. Just call us for a quote on an A-body conversion kit. TKO kits have been around for years. The TKX is the same except it fits the floor better. You need to have the right offset shifter for the transmission which we make just for the console cars.

          1. Hi I have a 1965 mustang I’m putting in a tkx 5 speed and I want to use a hydraulic clutch what kit will work with the tkx with a hydraulic t/out bearing

  1. Im doing a different engine swap and was looking to see if you offer kits for different motors? Its a 2.8l vr6 out of a vw.

  2. That sounds cool and all. But I would like to have one specifically made for the 4.3L V6 Chevy engine. Because it would be nice for us gearheads who like muscle but don’t like the fuel economy of the V8 engines.

    1. It does sound cool…..You know the 4.3 has a small block chevy bolt pattern right? the TKX bolts up to any SBC bell housing…We have all the stuff you need to make it work.

  3. Will this be a direct fit with no modifications for a 69 camaro .Do i need a different crossmember .What else do i need thanks

    1. Yep…You need our TKX Pro-Fit kit for 1st Gen Camaros. Give us a call at 931-646-4836. We do our quotes over the phone per application since there are many options.

  4. I’m interested the TKX in close ratio with .81 for my 65 Fastback Mustang in 10 spline input is that possible? Also how much work will need to be done if any to the Transmission Tunnel to fit?

  5. Wondering if this will fit in an early model 1965/66 mustang without having to modify the floor pans? Thanks!

  6. Sounds real good, but I got one for you. Do you have a version that will fit in a 1973 pinto four cylinder 2.0 liter?

  7. Same input spline as a Muncie? I can use my old clutch disc on my small block Chevy V8? How about the transmission yoke same number of teeth? How about the length of the transmission is it the same?