Keeping Your Fleet Running. Reliable Heavy Diesel Repair You Can Trust
From roadside breakdowns to full-service maintenance, our certified diesel mechanics get you back on the road fast — minimizing downtime and maximizing performance.
Servicing Dallas/Fort worth
817-936-8472
Need to schedule a repair or service?
Keeping Your Fleet Running. Reliable Heavy Diesel Repair You Can Trust
What Our Clients Say About Us
★★★★★
Average Rating: 4.6 out of 5 based on 62 reviews
Customer Satisfaction Guaranteed
Straight 6 has been working on my trucks for several years and they always have me in and out in no time. Very helpful knowledgeable. I highly recommend them
★★★★★
Adrian Escalante
Outstanding Diesel Mechanics
Had some electrical issues and these guys found the problem and got me back on the road
★★★★★
Shon Rios
Exceptional Service and Support
Had straight6 do an out of frame overhaul on my engine. I’ve had them work on my truck ever since (a/c, steering gear box, driveline, tires). Great shop and very reliable, highly recommend!
★★★★★
Rey Palmores
Reliable and Trustworthy Repairs
Honorable mechanics. Carlos was straight forward with me about my semi. Didn’t try and nickle and dime me. Got me in and out. Honest diesel mechanics are hard to find these days. I highly recommend.
★★★★★
Murasaki Freight LLC
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What We Do
At Strait 6, diesel repair isn’t just our job—it’s our passion. With years of experience in the heavy trucking and equipment industry, we know how costly downtime can be. That’s why we provide fast, dependable, and cost-effective repair solutions for owner-operators, fleet managers, and heavy equipment owners in Dallas-Fort Worth.
Our certified mechanics are trained to handle everything from engine rebuilds to routine services—and we stand behind our work with quality you can trust.
Why Choose Us?
Certified Diesel Technicians
Quick Turnaround Times
Honest and Reliable
Competitive Pricing
Customer-Focused Approach
State-of-the-Art Equipment
Expert Diesel Repair Services
When issues arise, our team specializes in Fort Worth, Texas heavy-duty diesel truck repair. We use advanced diagnostics and quality parts to get your vehicles back on the road quickly. Whether it’s engine repair, transmission service, or electrical troubleshooting, we’ve got you covered.
Why Choose Us for Fleet Maintenance?
- Reduce downtime with fast turnaround times
- Lower costs through preventative service plans
- Experienced diesel mechanics who understand commercial fleets
- Local Dallas-Fort Worth, Texas truck and trailer repair
Servicing: CAT, Detroit, Volvo, and Paccar Engines
Reliable Fleet Maintenance
Tailored solutions for your fleet’s needs.
Keeping your fleet running smoothly is essential to your business. At Strait 6, we provide reliable fleet maintenance services designed to minimize downtime, lower repair costs, and keep your trucks on the road longer. From preventative maintenance to diesel fleet repair, our certified mechanics deliver fast, dependable solutions you can trust.
Preventative Fleet Maintenance
Stay ahead of costly breakdowns with a customized fleet maintenance program. We handle:
Electrical system diagnostics
Oil & filter changes
Brake inspections & replacements
DOT inspections
Tire rotations & replacements
Cooling system checks
Routine Services: Oil and filter changes, Fuel system Maintenance, Cooling System Maintenance, Air Intake System, Exhaust System, Battery and Charging System, Belts/Hoses, Brake System, Tire Maintenance, Fluid Levels: Power Steering Fluid/Coolant, Engine Cleaning
Advanced Engine Diagnostics
Precision diagnostics for optimal performance.
Utilizing state-of-the-art technology, we diagnose engine issues accurately, providing effective solutions to enhance your vehicle’s performance.
CAT | Detroit | Volvo | Paccar
What to expect from us:
Competitive Pricing without compromising on safety or quality
Experienced Technicians with years of trailer repair expertise
Quick Turnaround Times to minimize downtime
High-Quality Parts & Service for lasting performance
Commercial & Fleet Services tailored to your business needs
Get Your Trucks and Trailers Running Smoothly with Our Expert Diesel Repair Services Today!
Services we offer
Tires & Brakes
Brake Adjustments
Valve lash Adjustments
Routine Services
Welding &
Fabrication
Clutch Adjustments
Truck Services
Our Heavy Diesel Repair Services Include:
Emergency Roadside Assistance – 24/7 breakdown service to get you back on the road.
Engine Diagnostics & Repair – Advanced diagnostic tools to quickly find and fix issues.
Transmission & Drivetrain – Repairs, rebuilds, and maintenance for smooth operation.
Brake Systems – Complete service for air brakes, hydraulics, and safety checks.
Suspension & Steering – Alignments, repairs, and replacements for heavy-duty handling.
Electrical Systems – Wiring, alternators, batteries, and troubleshooting.
Cooling Systems – Radiator, water pump, and cooling repair to prevent overheating.
Preventive Maintenance – Oil changes, filters, and full-service inspections.
DOT Inspections – Certified inspections to keep your fleet road-legal.
case.
Trailer Repair Services Include
Brake System Repairs & Replacements – Complete inspection, repair, and adjustment of trailer brakes.
Axle & Suspension Services – Keep your load stable and extend tire life with proper suspension maintenance.
Lighting & Electrical Repairs – From wiring issues to LED light installations, we’ll keep your trailer safe and compliant.
Wheel Bearings & Hubs – Prevent costly breakdowns with regular bearing service and replacements.
Frame & Welding Repairs – Professional welding to restore structural strength and safety.
Tire Repair & Replacement – Fast, reliable tire services to get you back on the road.
Preventive Maintenance – Routine inspections to catch small issues before they become expensive problems.
Keep Your Trailers Road-Ready
Don’t let breakdowns slow you down. Bring your trailer to Strait 6 for dependable repair and maintenance services. We’ll make sure your trailer is safe, compliant, and ready for the long haul.
Frequently Asked Questions FAQ
How often should I be changing my oil?
Regular oil changes, often every 7,500-15,000 miles or 500 hours, are crucial for engine health and performance. Changing oil filters at the same time ensures optimal oil flow.
What should I include on my Diesel Engine Maintenance Checklist?
Use this checklist to keep your diesel trucks in top shape:
Use high-quality oil and fuel additives when needed.
Change oil and filters on schedule.
Inspect and clean fuel injectors.
Check the alternator, radiator, and condenser for wear or damage.
Maintain the cooling system to prevent overheating.
Monitor for fuel contamination or oil oxidation.
Empty the water separator regularly.
What should be inspected often?
Regularly inspect and adjust components like valve lash, engine mounts, and the turbocharger for signs of wear or damage.
Annual Maintenance?
We recommend annual maintenance checks, including coolant flushes, valve lash adjustments, and turbocharger inspections.
How to prevent engine damage?
We recommends checking oil and coolant levels, and looking for leaks or damage before each start.