Diesel Engine & Transmission Repairs and Replacements Done Right
When it comes to the heart of your diesel truck—its engine and transmission—you need a team that knows how to handle high-torque systems built for heavy hauling and long-term endurance. At RG Diesel, LLC, we specialize in diagnosing, repairing, and replacing diesel engines and transmissions with precision and care.
From minor repairs to full overhauls or replacements, we help Ford Powerstroke, Dodge Cummins, and Chevy Duramax truck owners across East Tennessee stay on the road with power and reliability.
- Excessive smoke or engine noise
- Loss of power or torque under load
- Hard starting or engine misfires
- Slipping gears or hesitation when shifting
- Fluid leaks or low fluid levels
- Check engine light or transmission codes
Addressing these symptoms early can save you thousands in future repair costs. Our certified technicians use advanced diagnostic tools to identify the root cause and recommend only the services your truck truly needs.
Your diesel engine and transmission are engineered for durability—but even they need expert care. RG Diesel, LLC understands the demands of diesel truck ownership and provides transparent, trustworthy repair options. Whether you’re maintaining a workhorse or reviving a high-mileage vehicle, we’ve got the tools, training, and commitment to get the job done right.
Is it better to repair or replace a failing diesel engine?
That depends on the damage, mileage, and cost. We’ll help you weigh the pros and cons of each option.
How long does an engine overhaul take?
Typically 1–2 weeks depending on parts availability and the extent of repairs.
What’s included in a transmission replacement?
We replace the entire transmission assembly and related parts, including fluid, filters, and mounts.
Can you install a used or remanufactured engine I provide?
We evaluate all units for compatibility and quality before installation—just ask us for details.
Do you offer warranty coverage?
Yes, warranty options vary based on the type of repair or replacement performed. Ask us for specifics.
- 4×4 Services
- AC Repair
- Brakes
- Diesel Vehicle Care
- Domestic Diesel Trucks
- Electrical Services
- Electronic Services
- Engine Maintenance
- Fleet Brakes
- Fleet Drive Train
- Fleet Electrical
- Fleet Electronics
- Fleet Engine Work
- Fleet General Services
- Fleet Suspension Work
- General Services
- High Performance Brakes
- High Performance Cooling
- High Performance Engine Repair
- High Performance Exhaust
- High Performance Transmission Repair
- High-Performance Suspension
- Miscellaneous Services
- Quick Lube Services
- Transmission Services
- Undercar Services
