Buy Custom Built Premium Performance Transmissions - GearStar

The Ultimate, Or Nothing.

Heart pounding performance. 20+ years and counting. Welcome to the new Gearstar Performance.

Trusted By The Best.

Strap yourself in. Gearstar's precision, unrivaled craftsmanship takes your ride to the max level.

Legends Never Die.

Strap yourself in. Gearstar's precision, unrivaled craftsmanship takes your ride to the max level.

Zero Compromises.

Every transmission, every detail, everytime. Gearstar is engineering excellence.

Absolute Craftsmanship.

Strap yourself in. Gearstar's precision, unrivaled craftsmanship takes your ride to max level.

World-Class High Performance Automatic Transmissions

Gearstar Featured on Hod Rod Garage

Hand-built In the USA. Engineered To Perform.

If you're like many gearheads, you've put a lot of love into your ride. It's not just a hobby, this thing is your baby. We know how you feel, and Gearstar takes the same level of care with your high performance transmission as you have with the rest of your car or truck, which is one reason that over 50% of our business comes from referrals and repeat customers.

Each Gearstar high performance transmission such as nag1 transmission, 700r4 transmission, 4r70w transmission, 4l80e transmission and many more are built to your exact specifications from start to finish by one of the industry's top expert technicians using only the best US made performance parts available.

Why choose Gearstar Performance Transmissions?

  • Handmade with loving (and power-hungry) hands
  • Each transmission is built by one master technician from the projects start to finish
  • Performance automatic transmissions built using the industries best performance parts made in the USA
  • Each and every transmission is dyno tested the equivalent of 100 miles to insure that it is in perfect operating condition before it leaves our facility

To learn more about our specific products, visit our Ford performance transmissions, Mopar performance transmissionsGM performance transmissions, converters, or controller pages.