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Certified Transmission Inc

"Get It In Gear"

About Us

Looking for the highest quality transmission or driveline repairs in the industry? You have come to the right place! We have been providing top quality, industry-leading repairs right here in Mishawaka, Indiana, since first opening our doors back in 1967. Our highly trained, ASE certified technicians receive continual education to ensure they stay up-to-date on the latest technologies and techniques. By keeping our focus strictly on transmission and driveline repairs, we are able to offer unmatched knowledge and industry-leading expertise you can count on.

Why choose Certified Transmission Inc? We have been in the transmission and driveline industry since the 60’s, when we first opened our doors. Since then, our primary focus has been on providing the highest quality repairs with the best warranties in the industry. We have been able to deliver this to our customers by offering our industry-leading 3 year/100,000-mile nationwide warranty. Whether you are in need of a minor service or a major repair, you can rest assured that your vehicle is in good hands with Certified Transmission Inc!

Areas Served

Our Certifications

ASE Certified

What We Offer

Our Specialties include:

CV Axles
Transmission Rebuilds

Our Services include:

Transmission
Diagnostic
Automatics
Clutches
Torque Converters
Repairs
Rebuilds
Fluid Services
Leaks
Adjustments
& More!
Transfer case
Replacements
4X4 (Four-Wheel-Drive)
AWD (All-Wheel-Drive)
Electrical Systems
Manual Systems
Differential
Diagnostics
Front Differential Services
Rear Differential Services
CV Shafts
Driveshaft’s

Testimonials

On 11/18/2025 Jennifer Hysell had this to say:
Husband got our lincoln fix there they did a wonderful job tkz a lot

On 11/18/2025 Reza Nabizadeh had this to say:
Great place to fix your car

On 11/1/2025 Richard Gaspelin had this to say:
Had my transmission rebuilt on my 2017 chevy Silverado. I have peace of mind knowing the work comes with a 3 year/100k mile warranty. Drives perfect since leaving the shop, and very professional service!

On 10/1/2025 Traci Winston Williams had this to say:
Great friendly professional service. We always have are 🛞 tires ,tune ups and oil changes , get the trans service too Testimonial written by Traci Winston Williams on this site.

On 8/25/2025 Kippi & Steve Winchester had this to say:
Transmission was going out on my husbands car. Called and got me in quickly and installed new transmission and now runs like a dream. Prices was fair and if I need transmission work in the future I will go back . Definitely recommend. Thank you

Contact Us

Certified Transmission Inc
3703 Grape Rd Mishawaka, IN 46545
Phone: (574) 256-5528
Email: certransmission@aol.com

Where To Find Us

Payment Types Accepted

American Express, Personal Checks, Debit Cards, Discover, MasterCard, Visa

Our Hours

Holiday Hours May Vary. Please Call For Details.

Monday: 8:00 AM - 4:30 PM
Tuesday: 8:00 AM - 4:30 PM
Wednesday: 8:00 AM - 4:30 PM
Thursday: 8:00 AM - 4:30 PM
Friday: 8:00 AM - 4:30 PM