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.

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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

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Nag1 Transmission

Gearstar’s expert technicians can custom build the NAG1 transmission you have in mind for your Charger/Magnum or Jeep Grand Cherokee. If you’ve been searching for a shop to build your transmission but have not yet found one that meets your standards, feel free to check out the Gearstar online shop tour to see why their reputation for excellence proceeds them.

700r4

Searching for a performance transmission shop that will meet your tough standards? Gearstar custom-builds GM 700R4 transmissions with Torque Converters for your performance application. From start to finish, a single master technician will handle your transmission to guarantee excellence and consistency at every turn. Take an online tour of the shop to learn more.

4r70w Transmission

Finding a shop to custom-build your 4r70w transmission might not be as easy as you thought. Contact Gearstar to find out why their reputation in excellence means 100% satisfaction with your transmission. If performance and reliability are top on your list, visit the Gearstar website to see why they’ve been rated top in the industry.

4r70w

4r70w Are you looking for a shop that can custom build your transmission? Gearstar custom-builds Ford 4R70W transmissions, levels II, III, and IV with Torque Converters. With a reputation in the industry for excellence, Gearstar will exceed your expectations from start to finish. Find out more by visiting the ‘Transmissions’ link on the website to contact a master technician by emailing info@Gearstar.com.

4l85e Transmission

Gearstar sells top performance transmissions with a reputation for greatness. When it comes to building your 4L85e transmission, Gearstar’s master technician’s aren’t fooling around. Your Gearstar custom performance transmission is engineered and built to your exact specifications and guaranteed to exceed your expectations.

4l80e Transmission

Gearstar’s expert technicians can custom build the 4L80e transmission you have in mind. Gearstar knows you need a reliable transmission that performs to your standards- for this reason, every transmission at Gearstar is handled from start to finish by a single master tech to guarantee the consistency and reliability you need.

4l80e

Are you looking for an expert to custom build your 4L80e? Take an online tour of the Gearstar shop to learn why their master technicians have a reputation in the industry for excellence. You'll find that each and every transmission at Gearstar is handled by a single master tech to guarantee consistency and quality.

4l65e Transmission

Upgrading your ride? Gearstar can offer superior customization in building your 4L65e transmission, for performance that lives up to your tough standards. Visit the Gearstar website to learn more about the Gearstar reputation by clicking on the ‘Transmission’ link on the home page. To speak with a transmission pro, fill out the online contact form.

4l60e Transmission

Gearstar can custom build your 4L60e transmission to your specifications for exceptional performance and satisfaction. Every Gearstar transmission is built by a single master technician to guarantee you’ll be receiving the exact transmission you require for your application. Check out the online resources on the Gearstar website to learn more.

4l60e

Buy custom built, premium performance transmissions from Gearstar that have been engineered to excellence. Every Gearstar transmission, including their nag1, 700r4, 4r70w, 4L60e and other transmissions are built to your exact specifications by a single master technician- and Gearstar uses only the best US-made parts obtainable. Find out more on their website by clicking on the ‘Transmissions’ link.

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