American Powertrain Announces X-Factor Crossmember for 1964-1973 Mustangs

American Powertrain 6-speed swap crossmember

Performing a 6-speed swap into a first-generation Mustang has never been easier, thank to the help of companies like American Powertrain. If you need further proof, take a closer look at their recently announced X-Factor Crossmember for 1964-1973 Mustangs.

They’ve just made a huge announcement for first-generation Mustangs, that allows you to run a 6-speed TREMEC gearbox behind your traditional engine.

Official Release:

American Powertrain Introduces New 6-speed X-Factor Crossmember for Early Model Mustangs

Cookeville, TN – American Powertrain now offers a bolt-in aluminum crossmember for 1964-73 Ford Mustangs designed to fit TREMEC 6-speed transmissions that requires no modifications to the tunnel or chassis for installation. The crossmember features an attractive black powder coat finish and comes complete with both Grade-8 mounting hardware and an adjustable mounting pad.

Made in the USA using modular construction, all X-Factor crossmembers are constructed from T-6061 aluminum that is both lightweight and strong making it ideal for street or track applications. All X-Factor crossmembers come with a lifetime warranty against breakage.

American Powertrain, a TREMEC Elite Distributor located in Cookeville, TN, manufacturers and sells ProFit modern overdrive transmission systems, Science Friction clutches and flywheels, Hydramax hydraulic clutch systems, X-Factor crossmembers and thousands of powertrain accessories for muscle, sports, street rod and race cars.  For more information, visit American Powertrain at, watch this video, or call 931.646.4836.


  • No modifications required to the tunnel or chassis for installation
  • Allows you to run a 6-speed manual TREMEC transmission
  • Constructed from T-6061 aluminum that is both lightweight and strong
  • Made in USA

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