Hear from Our Customers
Your truck sitting broken means you’re not making money. Every day of downtime costs between $448 and $760 in lost revenue, plus towing fees and rental costs that add up fast.
We bring the repair shop to you. No waiting for tow trucks. No sitting in some shop for days wondering when you’ll get back on the road. Our mobile service gets you fixed and earning again, usually the same day.
When we’re done, you drive away knowing the job was done right the first time. That’s what 40 years of experience in Detroit gets you.
J&J Truck & Trailer Repair has been keeping Detroit’s trucks moving since the 1980s. We’re the family-owned shop that actually understands what you’re dealing with when your rig breaks down.
Dr. Phillip Marin leads our team with three Ph.D. degrees in Diesel Engineering, Drivetrains, and Metal Alloys. That’s not just impressive credentials—it’s the kind of deep knowledge that solves problems other shops can’t figure out.
We serve the entire Detroit metro, from I-75 to Telegraph Road, because we know these routes and the trucks that run them. When you call us, you’re getting people who’ve seen it all and fixed it all.
You call us when your truck won’t move. We dispatch a fully equipped service truck to your exact location, whether you’re on I-75, stuck at a loading dock, or broken down on Telegraph Road.
Our technician arrives with diagnostic equipment and common parts. We identify the problem fast—no guessing, no unnecessary delays. Most repairs happen on the spot.
If we need special parts, we get them. If the job requires shop work, we handle the towing and keep you updated every step. You get back to hauling freight as soon as possible, with paperwork that keeps your records straight.
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We handle everything from engine codes to air brake failures. Diesel diagnostics, transmission problems, reefer repairs, electrical issues—if it’s on your truck or trailer, we fix it.
Detroit’s trucking industry runs on tight schedules. You can’t afford to wait three days for parts or deal with shops that don’t understand commercial vehicles. We stock critical components and maintain relationships with suppliers who know urgency matters.
Our mobile welding equipment handles frame repairs on-site. We change tires, fix air leaks, and jump dead batteries. For Melvindale fleets, we offer maintenance contracts that prevent breakdowns before they happen.
We typically arrive within 60-90 minutes of your call, depending on your location and current service volume. Our dispatch system prioritizes emergency breakdowns that have drivers stranded on major routes like I-75 or Telegraph Road.
We operate 24/7 because truck problems don’t follow business hours. Whether it’s 2 AM on Sunday or during rush hour traffic, we’re equipped to reach you safely and start repairs immediately.
Our response time beats most competitors because we maintain service vehicles positioned throughout the Detroit metro area. When you’re losing money every hour your truck sits still, those minutes matter.
Most common breakdowns get fixed right where you are. Engine diagnostics, brake adjustments, air system repairs, electrical problems, tire changes, and battery replacements all happen on-site with our fully equipped service trucks.
We carry diagnostic computers, welding equipment, air compressors, and an inventory of frequently needed parts. About 75% of the calls we respond to result in the truck driving away the same day.
Major engine rebuilds, transmission overhauls, or extensive frame damage require shop work. In those cases, we arrange towing and provide detailed estimates before starting any work. We’ll also help you coordinate rental trucks if needed to keep your operation moving.
Yes, our technicians are trained on all major truck manufacturers including Freightliner, Peterbilt, Kenworth, Volvo, Mack, and International. We also service all trailer types—dry vans, reefers, flatbeds, and specialized equipment.
Dr. Marin’s advanced education in diesel systems and drivetrains means we understand the engineering behind these machines, not just the repair procedures. This helps us diagnose complex problems that might stump other shops.
Our diagnostic equipment works with both older mechanical systems and newer electronic controls. Whether you’re running a 1995 Peterbilt or a 2024 Freightliner with all the latest emissions equipment, we have the tools and knowledge to get it fixed right.
Our service call fee covers the first hour of diagnostic time and travel to your location. Additional labor is charged in 15-minute increments, and parts are billed at cost plus a reasonable markup.
Emergency calls after hours or on weekends carry a premium, but we believe in transparent pricing. You’ll know what you’re paying before we start any major work, and we don’t hit you with surprise charges.
For fleet customers, we offer maintenance contracts and volume discounts that can significantly reduce your overall repair costs. Many of our commercial clients save 20-30% compared to paying individual service rates.
Absolutely. We perform DOT inspections and can handle most violations on the spot. If you’ve been placed out of service, we’ll identify exactly what needs to be fixed and get you back in compliance as quickly as possible.
Our technicians understand current DOT regulations and can spot potential problems during routine repairs. This helps prevent roadside inspections from turning into expensive delays later.
We also maintain detailed service records that satisfy DOT requirements for commercial vehicles. This documentation can be crucial during inspections or if you need to prove maintenance history for insurance or resale purposes.
Yes, we provide comprehensive preventive maintenance programs designed specifically for commercial fleets operating in the Detroit area. Regular maintenance reduces breakdowns by up to 20% and extends vehicle life significantly.
Our fleet services include scheduled oil changes, brake inspections, tire rotations, and system checks performed at your facility or ours. We work around your operating schedule to minimize disruption to your business.
Fleet customers receive priority scheduling, volume discounts, and detailed maintenance tracking. We’ll also provide recommendations for replacement schedules and help you budget for major repairs before they become emergencies.
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