Comprehensive Truck & Trailer Repairs in South Glengarry
Certified MTO inspections, emissions testing, and heavy-duty repairs—minimizing downtime for drivers and fleets along the Cornwall and Highway 401 corridor.
OUR SERVICES
Certified Heavy-Duty Repair & Compliance Services
At RJ Truck & Trailer Repair Inc., we keep your fleet moving and your business compliant. With 30 years of real-world trucking experience, we offer owner-operators and transport companies a full range of certified mechanical solutions—from MTO inspections and emissions testing to advanced engine diagnostics, DPF/DEF troubleshooting, and custom fabrication. Every service is delivered with urgency, fairness, and technical confidence. Whether you need regular fleet maintenance, emergency roadside support, or specialized repairs for Volvo and Freightliner trucks, our Boundary Road shop in South Glengarry is your supply chain’s critical mechanical node.
Mobile Truck Repair Cornwall
Our Cornwall mobile repair service arrives equipped to handle diagnostics, minor repairs, and emergencies, reducing delays and towing expenses significantly.
Heavy Duty Mechanical Repairs
We diagnose and repair heavy duty trucks, restoring performance, safety, and reliability while minimizing costly downtime for operators and fleets.
DPF/DEF Troubleshooting
We identify clogged filters, sensor problems, and DEF system faults, restoring efficiency, compliance, and engine performance without guesswork or replacements.
MTO Inspections & Emissions
Our licensed technicians perform thorough MTO inspections, helping you stay compliant, avoid penalties, and operate confidently on every route daily.








