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Serving Wisconsin and Surrounding Areas

Your Transmission Specialists

Trans Works Transmissions has all top-selling Certified Transmission units in stock and available for same-day delivery* and offers full in-house warranty service on all transmissions sold!

We use the latest computerized transmission equipment featuring scanner diagnostics. We service what we sell and can take care of all transmission-related issues on domestic and foreign cars, 4 X 4 trucks, motor homes, and light trucks. Our highly trained and certified technicians ensure that your work will be done right the first time!

A Growing Business

Automatic Transmission Service In 1981, owners Mel and Kim Mravik began Trans Works in their home's garage as a part-time transmission repair shop. For over 35 years later, Trans Works has grown into a 9,000-square-foot, full-time service and sales facility equipped with a fully-certified technical staff.

Trans Works building Cars in a transmission repair shop

Trans Works Transmissions is an authorized distributor of Certified Transmission, a member of the Automatic Transmission Rebuilders Association, and the Automatic Transmission Service Group. Trans Works holds certifications from both Automotive Service Excellence and Automatic Transmission Service Group.

For the very best transmission service, visit Trans Works Transmissions in Portage.

*Freight charges may apply to non-stock units.


Monday - Thursday

7:30am - 5:00pm

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Phone: 608-742-5136

Fax: 608-745-1080

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