EXPERT LIGHT-DUTY DIESEL REPAIR

Harmon Performance Transmission is proud to announce we are now offering expert diesel repair services for light-duty trucks.


We specialize in the engines you depend on, including:

  • Powerstroke
  • Cummins
  • Duramax

From Diagnostics to Performance

Our experienced technicians have you covered for all your diesel needs. We offer a complete range of services:


  • Complete Diagnostics: We'll find the root of the problem quickly and accurately.
  • Full-Service Repair: From routine maintenance to complex engine work, we get you back on the road.
  • Aftermarket Performance Upgrades: Unleash the full potential of your truck.


Dreaming of a 1,000-horsepower Duramax? Need a transmission that can take a serious beating? We can do that.


With over 25 years of hands-on diesel repair experience, our team is ready to tackle any project. There is no job too big for us to handle.