Kenworth Truck Repair in Austin, TX
T680s running freight and W900s that have earned their keep — we keep Kenworths on the road and out of the breakdown lane.
Kenworth service at an independent Austin shop
Kenworth shares PACCAR power with Peterbilt, so the engine and aftertreatment work is familiar ground. What differs is how these trucks are used: highway miles pile on the air system, steer tires, and emissions hardware, and that is where we spend our diagnostic time.
Kenworth models and drivetrains we service
- T680 — Highway trucks with PACCAR MX-13 power and full aftertreatment systems.
- W900 — The long-nose classic — steering, front axle, and engine work on high-mileage trucks.
- T880 & vocational — Dump, mixer, and heavy vocational trucks that live off pavement.
- PACCAR MX & Cummins — Diagnostics and repair on MX-11, MX-13, and Cummins ISX/X15 power.
What we see fail on Kenworth
- DEF and SCR faults — Dosing failures and quality sensors that derate a loaded truck without much warning.
- Air leaks and slow build — Dryers, valves, and lines — the things that fail a DOT inspection.
- Steer tire wear — Almost always alignment or front-end wear, and cheaper to fix than to keep buying tires.
- Turbo and EGR problems — Lost boost and soot-loading that shows up as poor fuel mileage first.
- Charging and electrical faults — Batteries, alternators, and intermittent circuits that strand a truck overnight.
Kenworth work we handle
- PACCAR MX and Cummins engine diagnostics and repair
- Aftertreatment service — DPF, DEF, and SCR faults
- Air brake systems, dryers, and full brake jobs
- Heavy-duty alignment and front-end rebuilds
- Annual DOT/FMCSA inspections
- Preventive maintenance on a fleet schedule
Modern Diesel is an independent, Christian, veteran-owned shop — we service Kenworth trucks but are not a dealer or affiliated with the manufacturer. Warranty coverage on our work is set with your service advisor at the time of service.
Related services
Other makes we service
Peterbilt · Freightliner · Volvo · Mack · International · Isuzu · Hino
Bring it to the shop
We work on Kenworth at our shop at 2900 N FM 973, Austin, TX 78725, serving the Greater Austin Area (Travis, Bastrop, Williamson, Hays) — Austin, Del Valle, Manor, Elgin, Pflugerville, Round Rock, and the surrounding counties. Call 512-717-2777 and tell us what it's doing, or send us the details and we'll get back to you.
Common questions
Do you service PACCAR MX-13 engines?
Yes — MX-11 and MX-13 diagnostics, aftertreatment faults, and engine repair. We work from live data and fault history rather than swapping parts, because on these engines the code is often a symptom of something upstream.
My T680 is eating steer tires. What is wrong?
Usually alignment or front-end wear — kingpins, tie rod ends, or a bent component from a curb strike. We measure the alignment on our heavy-duty equipment and show you the numbers, so you are not replacing tires every few months.
Do you work on fleets of Kenworths?
Yes. Fleet accounts get priority scheduling, fleet pricing, and on-site service at your yard, and you can track every unit through the FleetGood portal. See our fleet maintenance and management services for how it works.
Ready when you are.
Drop by the shop at 2900 N FM 973, Austin, TX 78725 or call and we’ll get you scheduled.