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National Transmission, Inc.

About Us

National Transmission, Inc., located in Portage, IN, and serving the surrounding areas, is your premier destination for transmission services and more. Our expert team specializes in transmission repairs and also offers a wide range of automotive services, including auto repair, brake repair, radiator repair, engine repair, coolant system repair, towing service, small engine repair, vehicle diagnostics, car maintenance, and 4x4 service. Trust National Transmission, Inc. for top-notch service and reliable solutions for all your vehicle needs.

Areas Served

Portage, IN | Valparaiso, IN | Hobart, IN | Merrillville, IN | Chesterton, IN | Crown Point, IN

What We Offer

Our Services include:

Our Products include:

Testimonials

On 12/18/2024 Michael Bondi had this to say:
I am so pleased that I can hardly put it into words. My 2003 F350 was towed there, for what I thought for sure to be a water pump, because coolant was pouring out of the front of the engine. Andrew located the issue as being a split clamp. Other places would have put in a new water pump, because that is what I was expecting. Honesty and integrity are in short supply now a days. Thank you for not taking advantage of an old man

On 11/18/2024 Mark Shaffer had this to say:
We had a transmission replaced as well as several smaller repairs on other vehicles. Our experiences have all been positive. Andrew and his team did excellent, honest work at a fair price. I would not hesitate to bring my vehicles back to them or to recommend them to someone.

On 10/16/2024 Mark Sheckells had this to say:
They took care of my problem With ease Very professional and affordable

On 7/14/2024 Jimmie Piper had this to say:
Excellent people and service je went above and beyond what was expected and worked with me I recommend these guys respectful and honest thank you guys

On 2/15/2024 Lindsey C had this to say:
I didn't get the gentleman's name that helped me, but he was absolutely wonderful! Great honest people!

Contact Us

National Transmission, Inc.
5475 US Hwy 6 Portage, IN 46368
Phone: (219) 762-2228
Fax: (219) 763-2029
Email: tranzman23@frontier.com

Where To Find Us

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Our Hours

Holiday Hours May Vary. Please Call For Details.

Monday: 8:00 AM - 5:00 PM
Tuesday: 8:00 AM - 5:00 PM
Wednesday: 8:00 AM - 5:00 PM
Thursday: 8:00 AM - 5:00 PM
Friday: 8:00 AM - 5:00 PM
Saturday: 8:00 AM - 12:00 PM

News

On 12/17/2024 this was posted:
To celebrate the holiday season, please note our special hours:
- 12/24/2024: 8:00 AM - 1:00 PM
- 12/25/2024: CLOSED
- 12/31/2024: 8:00 AM - 1:00 PM
- 01/01/2025: CLOSED

We wish you a joyful holiday season and look forward to serving you in the New Year! 🎉
Expires 1/2/2025

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