O&S Diesel Performance
Proudly serving Parker County and surrounding areas, our veteran-owned shop handles everything from complete engine overhauls and transmission rebuilds to heavy equipment maintenance and 24/7 roadside assistance. Whether you drive a pickup or manage an entire fleet, we keep your diesel engines running at peak performance.
Explore Our Services
Engine Overhauls & Tuning
Experience a boost in power and longevity. We handle all phases of engine repair—from cylinder head work to full rebuilds—ensuring your diesel runs at peak performance.
Transmission Repairs
From slipping gears to complete overhauls, our transmission services keep your rig shifting smoothly. Ask about our performance upgrades for towing and heavy hauling.
Heavy Equipment Service
We provide on-site maintenance and repairs to minimize downtime on your project sites. Keep dozers, excavators, and more running strong with our expert team.
24/7 Roadside Support
Stuck on the side of the road? Our mobile team is here day or night to diagnose and fix issues on the spot, ensuring minimal delays and quick turnarounds.
What Our Customers Say
Dylan B.
“O&S came out to my house to help me diagnose my issue. They advised me on all my options in an honest manner. Ended up doing a motor swap and it's running great! Would use again.”
Sarah K.
“They rebuilt my equipment’s engine in record time—no downtime on our job site!”
Justin T.
“Had a breakdown at 2AM, they arrived within 30 minutes. Lifesavers!”