New Richmond’s Destination for Diesel Performance & Custom Transmission Repair
Family-Owned Excellence in Every Repair
At Harmon Performance Transmission & Diesel Repair, we are a family-owned and operated shop dedicated to providing elite care for your daily driver or your high-performance specialty vehicle. Our team of ASE-Certified Technicians brings specialized expertise to every job, ensuring your vehicle receives the precise attention it needs to stay on the road. From domestic cars to foreign SUVs and heavy-duty trucks, we offer a welcoming, dog-friendly, and handicap-accessible environment designed to make your repair experience as stress-free as possible.
What We Do
Precision Transmission & Diesel Services
At Harmon Performance Transmission & Diesel Repair, we specialize in delivering thorough, accurate transmission repairs and diagnostics for all types of vehicles—from domestic and foreign cars to heavy-duty trucks and specialty performance builds. Our experienced technicians are equipped to service both automatic and manual transmissions, along with 4WD systems, clutches, and critical driveline components like U-joints and driveshafts.
In addition to our deep expertise in transmissions, we proudly offer comprehensive diesel service and repair. With highly skilled diesel technicians on our team, we’re equipped to handle everything from diagnostics and routine maintenance to complex engine and performance repairs—helping diesel owners get the reliability and power they depend on.
Whether you’re dealing with shifting issues, need fluid service, require driveline repair, or are facing a major transmission or diesel repair, our commitment to precision and quality ensures your vehicle gets the expert care it deserves.
Who We Are
About Harmon Performance: Certified Expertise You Can Trust
Our Mission
Quality, Service, and Community
Our mission at Harmon Performance Transmission & Diesel Repair is to deliver exceptional repair and diagnostic services with unwavering integrity. We strive to exceed expectations through expert craftsmanship and a deep commitment to the New Richmond community.
Uncompromising Quality
We utilize only high-quality parts and state-of-the-art equipment to ensure long-lasting reliability.
Customer-Focused Service
From our accessible shop to our personalized communication, your convenience is our priority.
Community Commitment
We aren’t just a shop; we are your neighbors, invested in keeping our local drivers safe and satisfied.
Flexible Financing
for Unexpected Repairs
Unexpected transmission issues—especially for high-torque diesel trucks and performance builds—don’t have to stall your life. At Harmon Performance Transmission & Diesel Repair, we offer flexible financing options to help you get back on the road, or the track, without the upfront stress. Whether you are facing a heavy-duty diesel overhaul or a custom performance build, our financing solutions ensure your vehicle receives the elite care it deserves today.
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What Our Customers Say
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