High Performance Transmission Repair

High Performance Transmission Repair
High Performance Transmission Repair

Advanced Transmission Services for High‑Output Diesel Trucks

Your diesel truck’s transmission works hand‑in‑hand with the engine to deliver power, torque, and control under load. At RG Diesel, LLC in Greeneville, TN, we provide high performance transmission repair and upgrade services tailored for heavy‑duty diesel platforms including Ford Powerstroke, Dodge Cummins, and Chevy Duramax. If your truck is used for towing, hauling, or performance driving, our expert technicians can diagnose issues and repair or upgrade your transmission for improved reliability and performance.

Call 423‑823‑9987 or stop by 3460 W Andrew Johnson Hwy to schedule transmission service for your diesel truck.

When Your Diesel Transmission Needs Attention

Transmission issues can show up in different ways depending on use and load. Bring your truck in for inspection if you notice:

  • Slipping gears or delayed engagement
  • Harsh or erratic shifting
  • Unusual noises during acceleration or shifting
  • Delayed movement when shifting into drive or reverse
  • Burning smell or overheating
  • Transmission fluid leakage

Early attention helps extend the lifespan of your transmission and prevents costly failures down the line.

High Performance Transmission Services We Provide

Transmission Diagnostics

We begin with a comprehensive evaluation of your transmission using advanced scan tools and fluid analysis to pinpoint the exact cause of performance issues. This ensures repairs focus on the underlying problem, not just symptoms.

Transmission Fluid Service & Flush

Old or contaminated fluid cannot protect internal parts effectively. We perform fluid exchanges or flushes that remove heat‑damaging particles and restore smooth hydraulic operation.

Component Repairs

From worn bands and clutches to solenoids and valve bodies, we repair internal parts that are critical for smooth shifting and responsive performance under demanding use.

Torque Converter Repair & Replacement

The torque converter transmits engine power into the transmission. Issues here can lead to slipping, shuddering, or loss of drive. We diagnose and replace defective converters with diesel‑rated units.

High‑Performance Transmission Upgrades

For towing‑focused or performance builds, we offer upgrades such as reinforced clutches, high‑capacity torque converters, and enhanced valve body tuning to improve durability and shift quality.

Complete Transmission Replacement

When repairs are not enough, we provide full transmission replacements with high‑quality remanufactured or new units built for diesel loads and performance demands.
Why Premium Transmission Service Matters for Diesel Trucks

Diesel trucks generate significant torque and often face heavy duty cycles on the road, under load, or at job sites. Stock transmission components may wear faster under these conditions, and performance demands can push systems past their original specifications. With proper diagnostics, optimized fluid management, and targeted repairs or upgrades, you can:

  • Improve shift responsiveness
  • Extend transmission life
  • Enhance towing and load handling
  • Reduce heat‑related wear
  • Avoid unexpected breakdowns

At RG Diesel, LLC, we bring diesel‑specific skills to every transmission service, ensuring solutions that match your truck’s power and purpose.

High Performance Transmission Repair FAQs

Will a transmission fluid change improve shifting?

Yes. Fresh fluid with proper additives helps hydraulic circuits operate smoothly, reducing hesitation and shift shock.

Can transmission issues affect fuel economy?

Yes. Inefficient shifting and slip can reduce overall drivetrain efficiency and lead to higher fuel consumption.

How long does a transmission rebuild take?

Rebuild times vary, but most services take from one to several days depending on internal damage and parts availability.

Are performance upgrades worth it for everyday driving?

Absolutely. Many upgrades improve longevity and shift quality even in normal driving scenarios.

Can customization affect warranty coverage?

Some upgrades may impact manufacturer warranties. We can review options and help you understand implications before work begins.

At RG Diesel, we fix it right the first time with expert service, dependable workmanship, and honest communication you can count on.

Contact Us

Hours Mon - Fri: 8:00 am - 5:00 pm
Service Area East Tennessee, Northeast TN, Southern VA, Tri-Cities area
Stay Connected

Cart(0 items)

No products in the cart.