Here at J&S Transit, LLC & Diesel Performance, we specialize in a variety of different services to cater to your Diesel Truck Repair, Performance and Stepdeck Trucking needs. J&S Transit, LLC & Diesel Performance provides professional and quality Diesel Service & Repair. We have an excellent reputation as a diesel truck repair and service shop. Our professionals install quality parts to get the most performance out of your diesel truck. Specializing in custom diesel modifications for fuel economy and/or performance; we guarantee reliable services and upgrades. No job is too complicated. Contact us today to speak to a local professional to schedule an appointment! We do general diesel repair on all makes and models of diesel motors class 2 through class 8 Trucks. Ford PowerStroke, Dodge Cummins, Chevy Duramax, Also Detroit, Cummins, and Caterpillar! We specialize in Ford 7.3, 6.0, 6.4, and 6.7 PowerStroke Repair and Performance. Offering: Tuning, EGR upgrade or delete, Air Intake, Exhaust systems and a variety of other services! Serving the La Crosse, Tomah, Viroqua, Sparta, and Wesby, WI Area. Give us a call with your needs or to schedule an appointment today!! Are you looking to ship something that can’t be handled by a standard flatbed? No problem — we've built our company on tough jobs like these. We haul Stepdeck freight across the lower 48 except CA to get your freight where you need, when you need it!