Diesel Repair in Clayton

When your diesel vehicles experience issues, it can feel like your entire operation is at a standstill. Whether you're managing a fleet of light-duty pickups or massive over-the-road semis, having a reliable diesel repair service is crucial to keeping your business on the move. Nestled in the heart of Clayton, Ryan’s Diesel Service is here to support local businesses with expert repairs and thorough Department of Transportation (DOT) inspections. Our mobile service truck means that we can often come to you, providing convenience without sacrificing quality. With a commitment to trust and excellence, you can count on us to have your vehicles back on the road where they belong, so you can focus on what really matters—growing your business and serving your customers.

High End Diesel Products Is Our Specialty

Ryan’s Diesel Service is no stranger when it comes to the manufacturing of high-end diesel products.

Learn more about us HERE

Warranties on Our Turbos

Outlined on product pages and HERE

All Turbos Are Manufactured in House

We believe all products should be manufactured in-house to maintain high levels of quality control.

Our Customers Love Us

Over 100 Reviews on google with a 5 star rating. View HERE

High End Machining

We currently have a HAAS VF4 5-axis machining center which runs a fair majority of our products. We also have a HAAS TL-1 lathe.

Turbo balancing is all done in-house on either our West Coast Balancer WCB30 or CWT industries balancer.

Diesel Repair Services – Your Trusted Diesel Repair Shop in Wisconsin

At Ryan’s Diesel Service, we specialize in comprehensive diesel repair and maintenance for light and medium-duty diesel trucks and vehicles. With over 15 years of experience serving Southeastern Wisconsin, our ASE-level technicians deliver honest diagnostics, dependable repairs, and performance-driven service you can count on.

Whether you’re dealing with a hard-to-diagnose engine issue or need routine diesel system maintenance, our team has the expertise and equipment to keep your diesel running strong.

What We Repair

We provide a full suite of diesel repair services, including:

  • Engine and Drivetrain Repair
  • Diesel engine diagnostics and repair
  • Fuel system service, tuning, and injector replacement
  • Turbocharger replacement, rebuilds, and upgrades
  • Engine swaps and rebuilds

Diesel Performance & Upgrades

  • Performance enhancements and tuning
  • Drop-in turbos and custom builds
  • Power delivery optimization

Suspension, Transmission & More

  • Transmission diagnostics and repair
  • Suspension and drivetrain upgrades
  • Electrical system troubleshooting

Advanced Diagnostics

Our shop uses state-of-the-art tools to pinpoint performance issues fast- saving you time and money on unnecessary repairs.

Why Choose Ryan’s Diesel Service?

Choosing Ryan's Diesel Service means partnering with a locally-owned business deeply rooted in Claytons' vibrant community. Our team brings years of specialized experience, ensuring that each vehicle, from light-duty pickups to heavy-duty semis, receives top-notch service backed by industry expertise. Whether you're managing a small fleet of five or a robust operation with fifty vehicles, we guarantee comprehensive solutions tailored to your unique needs, including thorough Department of Transportation (DOT) inspections.

Our mobile service truck allows us to come to your location, offering convenience and swift repairs to minimize downtime. When you choose Ryan's Diesel, you can expect exceptional service with a commitment to quality; we provide warranties on all our work, ensuring peace of mind with every repair. Your fleet's performance is our priority, and we're dedicated to keeping you on the road, operating at peak efficiency.

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