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Ryan's Diesel Service
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        • 94-02 5.9L
        • 03-07 5.9L
        • 07.5-18 6.7L
        • 19-24 6.7L
      • Ford Powerstroke
        • 99.5-03 7.3L
        • 03-07 6.0L
        • 11-14 6.7L
        • 15-19 6.7L
        • 20-22 6.7L
        • 23-25 6.7L
      • Chevy/GMC Duramax
        • 01-04 LB7
        • 04.5-05 LLY
        • 06-07 LBZ
        • 07.5-10 LMM
        • 11-16 LML
        • 17-23 L5P
    • Air Intake
    • Exhaust Components
    • Lift Pump
    • Transmission
    • S400 Turbocharger
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      • 01-04 LB7
      • 04.5-05 LLY
      • 06-07 LBZ
      • 07.5-10 LMM
      • 11-16 LML
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Diesel Repair in Milwaukee

For Milwaukee's busy residents and local businesses, ensuring your diesel vehicles are in optimal condition is essential. When the engines that drive your fleet encounter issues, it can disrupt operations and lead to costly downtime. Ryan’s Diesel Service stands ready to support you, whether your needs include light-duty pickups or heavy-duty semis. Our skilled team provides comprehensive repair services and DOT inspections tailored to your requirements. With our mobile service truck, we bring the expertise right to your location, ensuring minimal disruption to your day. Count on Ryan’s Diesel for reliable service that prioritizes quality and builds lasting trust within the Milwaukee community.

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.

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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 means opting for a locally owned service provider that truly understands the unique needs of Milwaukee’s fleet operators. With over a decade of hands-on experience, our skilled technicians are adept at servicing everything from light-duty pickups to heavy-duty semis, ensuring excellence and reliability in every repair. Whether your fleet consists of five vehicles or fifty, we offer tailored solutions, including comprehensive DOT inspections to keep you compliant and on the road. Our mobile service truck adds a layer of convenience, allowing us to handle straightforward repairs right at your location, minimizing downtime. At Ryan's Diesel, we prioritize our customers by offering a 12-month warranty on parts and labor, giving you peace of mind with every service. Our commitment is to provide not just repairs but also proactive maintenance that extends the life and performance of your fleet, driving your business forward.

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Ready to set up an appointment?

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Dodge Turbocharger

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Ford Turbocharger

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GM Turbocharger

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Cab & Chassis Turbocharger

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Shop By Category

  • Shop All
  • Drop in Turbos
    • Cab & Chassis Turbocharger
    • Dodge Cummins
      • 94-02 5.9L
      • 03-07 5.9L
      • 07.5-18 6.7L
      • 19-24 6.7L
    • Ford Powerstroke
      • 99.5-03 7.3L
      • 03-07 6.0L
      • 11-14 6.7L
      • 15-19 6.7L
      • 20-22 6.7L
      • 23-25 6.7L
    • Chevy/GMC Duramax
      • 01-04 LB7
      • 04.5-05 LLY
      • 06-07 LBZ
      • 07.5-10 LMM
      • 11-16 LML
      • 17-23 L5P
  • Air Intake
  • Exhaust Components
  • Lift Pump
  • Transmission
  • S400 Turbocharger
  • Fuel Systems
    • 01-04 LB7
    • 04.5-05 LLY
    • 06-07 LBZ
    • 07.5-10 LMM
    • 11-16 LML
Ryan's Diesel Service

W356S8950 Godfrey Lane
Eagle, WI 53119

Call us at 262-844-9990

sales@ryansdieselservice.com

“Rates from 0–36% APR. Payment options through Affirm are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. CA residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Finance Lenders Law license. For licenses and disclosures, see affirm.com/licenses. For example, a $800 purchase could be split into 12 monthly payments of $72.21 at 15% APR or 4 interest free payments of $200 every 2 weeks.”

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  • Shop All
  • Drop in Turbos
  • Dodge Cummins
  • Ford Powerstroke
  • Chevy/GMC Duramax
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  • Exhaust Components
  • Lift Pump
  • Transmission
  • S400 Turbocharger
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