Expert Diesel & Auto Repair in Gallatin Valley

MOsher Mechanical

Transmission Replacement & Diagnosis

Front End

Brake System

Emissions systems


Complete Car Care Quality Work

Your Trusted Mechanic in Gallatin Valley
With decades of combined experience in diesel, off-road motors, vehicle care, and specialty fabrication, Mosher Mechanical Services quickly and accurately diagnoses issues, providing honest assessments and quality work.
Car engine undergoing repair with exposed pistons and wiring in Belgrade MT
Close-up of a winch installed on Jeep front bumper in Belgrade MT




Stand by Our Work

Restored Performance

Certified Trust

BBB Certified

Client Testimonials

Trusted by Our Community

Triston Larmour
Triston Larmour
Morgan did a lot of work for me. Great guy fun to talk too. fair pricing and quick service would definitely recommend.
Gabriel Litchfield
Gabriel Litchfield
Morgan is a great guy. Only one in town to do a custom transmission job on my 1988 Cherokee. Did a great job and it's runnin like a charm 4,000 miles later! I only bring my business to them. One of his shop techs is a Jeep fanatic as well. Extremely knowledgeable. Thanks for your handwork.
John Brezney
John Brezney
Morgan is awesome. Easy to talk with, extremely honest, very fair with pricing, very professional and friendly. That's about him, his work is something else, GREAT, AWESOME, FAST, CLEAR, Myself and my diesel truck will absolutely go back to his shop. Thanks again Morgan. Extremely pleased.
Lynn Short
Lynn Short
I will always refer anyone to Mosher Mechanical Service. Morgan is not only extremely knowledgeable but runs his shop with integrity and honesty which is hard to find today. He explains exactly what needs to be done immediately and what needs attention in the future. His pricing is amazing and and fair. I can not say enough about this mechanic and as I stated before, I will refer anyone that wants good service, fair pricing and honesty to Mosher Mechanical Service. Thank you Morgan for renewing my faith in integrity and mechanics.
John Gallagher
John Gallagher
Morgan is the best! I stopped by his shop the other week after work. I was thinking that my wheel bearing was going out, he immediately propped my truck up and confirmed my suspicions. Penciled me in and got me on the books a few days later. Boom truck fixed. Such a pleasure to work with him. I have found my mechanic in the Gallatin Valley. Very happy with my entire experience!
Tim Gregoire
Tim Gregoire
Morgan is great! Fit me in the day of when I was traveling, and did a great job at a fair price. Thanks so much!
John C
John C
Morgan got me back on the road with more power and better fuel economy.
Samuel Naylor
Samuel Naylor
Mosher Mechanical Services was extremely easy to work with! The customer service was great, and my truck was back running in no time!
Matt Wertheim
Matt Wertheim
Morgan was actually recommended to me by other mechanics in the area. I was in a bind and needed a repair on my engine mount same day. Morgan was able to fit me in and solve the problem masterfully. I could tell he knew what he was doing and took pleasure in his work. I would absolutely recommend his shop to anyone.


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