About Ryan’s Diesel Service 

Since 2009, Ryan’s Diesel Service has been providing customers with A+ customer service on performance diesel repairs and maintenance in Southeastern Wisconsin. Ryan’s Diesel Service has over a 9000 sqft facility to perform diesel repair and service; stocking many diesel performance products on hand. In addition to online sales, Ryan’s Diesel Service also has an 8-bay service center, with the expertise to handle any service or repair needed on your truck.

Diesel Performance Shop & Truck Repair

The light-duty truck repair: we work on anything from daily drivers to competition vehicles; we can handle any of your truck’s needs. Many repairs include head gaskets, injectors, turbochargers, emissions issues, transmissions, drivetrain, electrical and more.

Our medium and heavy-duty repair: we can service; engine repair/ major overhaul, clutches/transmissions, brakes/hubs, emissions/DEF issues, forced regens, DOTs. While some trucks aren’t driveable we do have a mobile service truck to come onsite to insure your truck will safely make it to our shop for repair.

Engines/transmissions we service include Duramax Diesel, Powerstroke Diesel, Cummins Diesel, PACCAR, Allison Transmission, Eaton/Fuller.

Dealer-level software we have includes GM SPS/TIS2Web, Cummins Insite/Quickserve, JPRO, Allison DOC, Meritor WABCO and more.

When you are searching for the best diesel performance shops near me, look no further than the experts at Ryan’s Diesel.

Custom Diesel Machine and Manufacturing 

Ryan’s Diesel Service is no stranger when it comes to the manufacturing of high-end diesel products. Ryan believes all products should be manufactured in-house to maintain high levels of quality control.

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.

In addition to diesel turbos being manufactured in-house, we also offer cylinder head machining for diesel and gas engines. In the summer of 2021, Ryan purchased the remaining machines from a closed local machine shop to bring these services in-house. This means all head gasket jobs done by Ryan’s Diesel Service are completed in-house with zero outsourcing. From being washed in our 220f parts washer, to pressure tested and milled they never leave our building. If you are a local customer you can also bring your cylinder heads into the shop for machining and cleaning.