Your truck’s transmission and drivetrain are the backbone of performance, fuel efficiency, and safe hauling. At McCallon’s Diesel Services, we provide expert transmission and drivetrain diagnostics, repairs, and maintenance for diesel trucks and fleets across the St. Louis Metro, St. Charles County, Lincoln County, and Warren County. Whether you’re experiencing shifting issues, unusual noises, or complete failure, our certified technicians will get you back on the road quickly and safely.
Transmission Services
Heavy-duty transmissions require skilled care. Our team is trained to handle everything from fluid service to full rebuilds.
- Transmission diagnostics
- Fluid changes & filter replacement
- Clutch adjustment, repair & replacement
- Gearbox service & repair
- Torque converter service
- Preventative maintenance programs
Drivetrain Services
Your drivetrain transfers power from the engine to the wheels—and even a small problem can take your truck off the road. We specialize in drivetrain inspection and repair to restore reliability and performance.
- Driveshaft & U-joint replacement
- Differential repair & rebuild
- Axle service & replacement
- Transfer case service
- Bearing & seal replacement
- Vibration & noise troubleshooting
Why Choose McCallon’s Diesel?
✔ Certified technicians experienced in heavy-duty transmission & drivetrain systems
✔ Honest diagnostics with no guesswork or unnecessary repairs
✔ Service for single trucks and entire fleets
✔ Fast turnaround to minimize costly downtime
✔ 24/7 emergency roadside support available
Schedule Transmission & Drivetrain Service Today
Don’t let shifting problems or drivetrain failures put you behind schedule. Contact McCallon’s Diesel Services today for dependable transmission and drivetrain service across the St. Louis Metro.