Scheduled maintenance, Air Intake, Exhaust, Gauges, Head studs, Fuel Injectors – Stock to Wild, Fuel Systems and upgrades, Turbo / Wheels, HPOP Upgrades, EGR Upgrade or Delete, Oil Cooler Replacement or Upgrade with or without Remote Mount Oil Filtration, Coolant Filtration System, Custom tuning on: TS-6 Position Chip, PHP Hydro, SCT, H&S, Smarty, EFI Live, Upgraded FICM, CCV, Crank Case Vent Mod, 6.0 Trans Cooler, Transmission Upgrades, Drivetrain, Lift Kits, Tires / Wheels, Radiator, Intercooler, exc.

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Whether you need your diesel truck fixed, serviced, or modified, you have come to the right place. J&S Transit, LLC & Diesel Performance is your one-stop diesel resource, specializing in custom performance modifications, diesel truck repair, step-deck trucking, and much more. We’re equipped to handle any project, big or small, simple or complex.

We provide precise, cost-effective diesel truck repair services on all makes of models of diesel motors, from class 2 through class 8. Looking to boost your truck’s performance? Give us a call, we’ll help you optimize your vehicle’s performance level, while adding miles to its lifespan at the same time. Our highly skilled mechanics use only top-quality parts and we guarantee reliable service, so you can trust we will get the job done right the first time, every time. We also provide affordable step-deck trucking, powerstroke repair, and powerstroke performance services, in addition to much more.

Located in Cashton, WI, J&S Transit, LLC & Diesel Performance offers convenient hours and excellent service, Monday through Friday. Saturday appointments are also available upon request. We proudly offer reliable diesel truck repair, performance, and maintenance services to both residential and and commercial clients. Call us today at 608-604-0371 to learn more and schedule your appointment.