Transmission Service | Portage, IN - National Transmission Inc.
carr National Transmission, Inc.
Mechanic working on transmission repairs

How can we serve you?

Your source for quality transmission service

When it comes to servicing your vehicle's transmission, not just any auto repair shop will do. At National Transmission Inc., we offer prompt and reliable service, and we stand solidly behind our work with a 100% parts and labor nationwide warranty.

What we offer

- FREE transmission diagnosis with repair

- Transmission repairs

- Transmission service

- Transmission rebuilds

- Service for foreign and domestic models

- 4x4 transmission service

- Front-wheel drive transmissions

- Recreational vehicle transmissions

Bring your car in today


When you work with National Transmission Inc., you're working with the best in the business. Our transmission experts have the in-depth knowledge and skills it takes to get the job done right. Count on it!

We deliver reliable transmission services at affordable prices. We guarantee it!

We're your local experts for transmission work.

We're more than just transmission specialists. Our full range of repair and maintenance services includes engine diagnostics, oil changes and more.