Powertrain Problems Solved by Certified Diesel Techs
If your transmission is grinding, slipping, or refusing to go into gear, you're risking major downtime and expensive breakdowns. At Road 1 Inc, we provide expert diagnostics, repairs, and replacements for heavy-duty diesel transmissions and clutches — from 10-speed manuals to automated and full auto gearboxes.
We service Class 6–8 trucks, fleet vehicles, and construction diesel platforms with in-shop and mobile drivetrain solutions.
We Work With Your Fleet Maintenance Company
- We know the process from approvals to payment.
- We handle the paperwork so you don't have to.
- We keep your trucks moving with fast repair when and where you need them.
24/7 Emergency Diesel Repair Experts
Trusted by Columbia’s fleet managers and owner-operators for on-site service anytime, anywhere.
Certified Diesel Technicians
Our team combines over 20 years of hands-on experience in diesel engine diagnostics.
Fleet Contracts with DOT Compliance Support
Partnered with local logistics, construction, and agricultural businesses to keep fleets road-ready and regulation-compliant.
Backed by Real Reviews & Repeat Clients
Hundreds of trucks serviced with consistent 5-star testimonials praising our speed, honesty, and technical precision.
Quality Repairs & Service Guaranteed
Transmission & Clutch Services We Offer
-
Manual and automatic transmission diagnostics
-
Transmission fluid flushes and filter replacement
-
Clutch adjustment, repair, and replacement
-
Pressure plate, throwout bearing, and flywheel service
-
Input/output shaft and seal repair
-
Synchronizer and gear replacement
-
PTO installation and maintenance
-
Driveshaft inspection and U-joint service
Warning Signs of Transmission or Clutch Trouble
-
Grinding or popping out of gear
-
Slipping between gears under load
-
Burning smell or overheating during operation
-
Fluid leaks under the transmission housing
-
Hard starts or gear engagement issues
-
Rattling or vibration from the bellhousing area
Common Brands We Service
-
Eaton Fuller
-
Allison Automatic
-
Meritor
-
ZF
-
Mack
-
Spicer
-
Volvo I-Shift and Detroit DT12 systems
Why Road 1 for Transmission & Clutch Service?
-
Certified diesel drivetrain technicians
-
In-house diagnostics and fluid testing
-
OEM-grade tools and torque specs
-
Fast clutch replacements and rebuilds
-
Fair pricing and no unnecessary upsells
-
Mobile repairs available for fleet clients
Testimonial
"Our transmission locked up 100 miles out. Road 1 towed us in, diagnosed it that afternoon, and had a new clutch in the next day. They kept us rolling." – Fleet Supervisor, Midlands SC
Transmission Service FAQ
Do you rebuild transmissions in-house?
We perform component-level repairs and clutch replacements on-site. Major rebuilds can be arranged through our partner rebuild facility.
How do I know if my clutch or transmission is failing?
Shifting problems, slipping under load, or noise when engaging gears are early signs. If caught early, repairs can often avoid full replacement.
Do you offer mobile clutch repair?
Yes. Many clutch adjustments, slave cylinder replacements, and linkage repairs can be handled on-site.
Can you handle transmission service for mixed fleets?
Absolutely. We service manual, automated manual, and automatic systems across most heavy-duty platforms.
Schedule Powertrain Service Today
Call (803) 794‑5155 or [Request a Transmission Inspection]
Get back in gear with Columbia’s heavy-duty repair experts.