MEDIUM-DUTY & HEAVY-duty Diesel Repair Services
Servicing East Tennessee, Western North Carolina, and Surrounding Areas
From advanced engine diagnostics and injector repairs to transmission work, axle repairs, brake service, and DPF cleaning, our team delivers dependable repairs designed to maximize uptime and extend the life of your equipment.
Complete Heavy-Duty Diesel Repair Services
Servicing East Tennessee, Western North Carolina, and Surrounding Areas
Engine Diagnostics & Repair
Modern diesel engines require specialized diagnostic equipment and expertise. We accurately identify performance issues, fault codes, and mechanical failures to provide effective repairs.
Services Include:
- Check engine light diagnostics
- Engine performance troubleshooting
- Low power and derate diagnosis
- Turbocharger repairs
- EGR system repairs
- Cooling system repairs
- Oil leak repairs
- Engine component replacement
Diesel Fuel System & Injector Service
Fuel system problems can lead to hard starts, poor fuel economy, excessive smoke, and reduced performance.
Services Include:
- Fuel injector testing and replacement
- High-pressure fuel system repairs
- Fuel pump replacement
- Fuel contamination repairs
- Fuel line repairs
- Fuel filter service
- Fuel pressure diagnostics
DPF, SCR & Emissions System Repair
Emissions system issues are one of the most common causes of derates and downtime for modern diesel trucks.
Services Include:
- DPF cleaning and replacement
- Forced regenerations
- SCR system diagnostics
- DEF system repairs
- NOx sensor replacement
- EGR valve service
- Emissions fault diagnostics
- Aftertreatment system repairs
Transmission & Drivetrain Repair
Your transmission and driveline are critical to vehicle performance and reliability. We diagnose and repair issues before they become major failures.
Services Include:
- Manual transmission repairs
- Clutch replacement
- Driveline inspections
- Driveshaft repairs
- U-joint replacement
- Differential repairs
- PTO system repairs
- Transmission diagnostics
Axle & Suspension Repairs
Proper suspension and axle performance help maintain safe handling, tire life, and overall vehicle stability.
Services Include:
- Front and rear axle repairs
- Wheel bearing replacement
- King pin replacement
- Suspension component repairs
- Spring and shackle repairs
- Air ride suspension service
- Alignment-related repairs
- Steering system repairs
Heavy-Duty Brake Service
Reliable braking performance is essential for safety, compliance, and operational efficiency.
Services Include:
- EBrake inspections
- Air brake diagnostics
- Brake chamber replacement
- Slack adjuster repairs
- Brake shoe replacement
- Rotor and drum replacement
- ABS diagnostics
- Air system repairs
WHY CHOOSE Biscuit's Maintenance in Motion?
We understand the challenges truck operators face. That’s why we go beyond repairs to provide long-term solutions and preventive maintenance programs that keep your vehicles and equipment running reliably.
- Mobile & In-Shop Repair Services
- From vans to semi-trucks, nothing is too big or too small.
- 1 truck or 100, no fleet is too large or small.
- Brakes, tires, diagnostics, regens, engine replacements, clutch replacements, PMs, pre-purchase inspections, & many more services available.
- Gas generators, propane forklifts, all the way to heavy-duty diesel engines – if it services your company, we service it.
- Tires & alignments for all vehicle sizes.
- Kingpins & springbushings.
- Preventive Maintenance Programs
- Fully licensed and insured.
- Locally owned and operated.
NEED DIESEL REPAIR?
Servicing East Tennessee, Western North Carolina, and Surrounding Areas
Who We Serve
We deliver reliable in-shop and mobile diesel repair services. Servicing East Tennessee, Western North Carolina, and Surrounding Areas
MOBILE REPAIR SERVICES AVAILABLE
Our mobile service team visits your location to perform on-site repairs and minimize downtime.