Semi-Truck Transmission Repair, Rebuild & Replacement USA & Canada | 24/7 Roadside Assistance
In the heavy-duty world, the transmission is the brain that translates the raw power of your diesel engine into the torque needed to move 80,000 pounds. When it fails, you are not just dealing with a mechanical hitch; you are dealing with a total operational standstill.
Whether it is an Eaton Fuller 18-speed manual that will not find a gear or a Detroit DT12 automated manual that has gone into a fault state and locked you in neutral, a transmission failure is a high-stakes crisis.
At MTS Truck Repair, we specialize in semi-truck transmission repair, rebuild, and replacement across the United States and Canada. Our mobile diesel technicians bring diagnostics, specialized tools, and driveline expertise directly to your location.
Is your transmission grinding, slipping, or stuck in gear? Call MTS Truck Repair now at 1-844-888-7587.
24/7 Emergency Transmission & Clutch Service
Transmission problems often happen under heavy load, in stop-and-go traffic, or while climbing steep grades. A failed clutch brake can leave you unable to get into gear at a stoplight. A failed range selector can leave you stuck in low gear on a highway.
MTS Truck Repair operates 24/7 across the USA and Canada because logistics never stops. When you call, we work to understand whether the issue is mechanical, air-related, electrical, clutch-related, or AMT software-related.
Stuck in neutral? Cannot find a gear? Call 1-844-888-7587 for transmission support.
What We Fix: Transmission & Driveline Solutions
A semi-truck transmission contains high-pressure air systems, electronics, gears, shafts, clutches, sensors, and hydraulic components. MTS Truck Repair supports all major Class 8 transmission systems.
1. Manual Transmission Repair
- Eaton Fuller Support: 10-speed, 13-speed, and 18-speed troubleshooting.
- Grinding or Popping Out of Gear: Diagnosis of synchronizer, sliding clutch, and internal wear concerns.
- Input & Output Shaft Issues: Support for failed seals, vibration, and related driveline concerns.
- Range Selector & Splitter Problems: Air-powered valve, cylinder, and shift-related troubleshooting.
2. Automated Manual Transmission Diagnostics
Modern trucks rely on AMTs like Detroit DT12, Volvo I-Shift, Mack mDRIVE, and other automated systems. Many problems are caused by air, electrical, sensor, or actuator failures.
- Transmission control diagnostics
- Solenoid valve troubleshooting
- Clutch actuator issues
- Shift calibration support
3. Transmission Rebuilds & Replacements
If the internal damage is too severe for a roadside repair, we help coordinate the correct next step.
- Transmission replacement support
- Remanufactured transmission coordination
- Clutch replacement support
- Clutch brake service
4. Transmission Cooling & Fluid Systems
- Transmission cooler and line repair
- Fluid leak inspection
- Contamination checks
- Seal and line support
5. Allison Automatic Transmission Service
For vocational trucks, dump trucks, buses, and specialty units, we support Allison automatic transmission issues.
- Shift selector problems
- External sensor issues
- Wiring harness concerns
- Transmission fault diagnostics
Is your transmission temperature rising? Call 1-844-888-7587 for support.
Why Choose MTS Truck Repair?
Save Thousands by Avoiding the Tow
A heavy-duty tow for a truck with a locked transmission can be expensive and complicated. The driveshaft may need to be removed before transport. When roadside diagnosis or repair is possible, we help reduce cost and downtime.
Diagnostic Accuracy
Transmission faults are not always internal transmission failures. Sometimes the problem is a small air valve, chafed wire, clutch actuator, or control issue. We focus on diagnosis before replacement.
USA & Canada Support
Whether you are hauling from Toronto to Laredo or Seattle to Vancouver, MTS Truck Repair gives you one number for North American transmission support.
Full Driveline Understanding
We do not look only at the gearbox. We also consider U-joints, carrier bearings, yokes, clutches, and driveline vibration that may be causing or worsening the problem.
Fast Response & Mobile Shop Capabilities
Our mobile service vehicles are designed for serious heavy-duty repair support.
- High-capacity hydraulic jacks
- Transmission support equipment
- Diagnostic laptops and scanners
- On-board air and power
- Common air lines, valves, linkage parts, and fittings
- Roadside safety lighting
Need a technician with the right tools? Call 1-844-888-7587.
Areas We Serve: USA & Canada
MTS Truck Repair provides transmission and clutch service support across the United States and Canada.
- Major U.S. interstates including I-95, I-80, I-10, I-75, I-40, and I-5
- The Trans-Canada Highway and major Canadian freight routes
- Truck stops including Love’s, Pilot Flying J, TA/Petro, and Irving Big Stop
- Distribution centers and shipping hubs
- Border crossings including Detroit, Buffalo, Laredo, and Blaine
Call Now for Immediate Transmission Service
If your transmission is acting up, do not push through it. Continuing to drive with grinding gears, a slipping clutch, a shifting fault, or a transmission overheat warning can turn a manageable repair into a major failure.
MTS Truck Repair is standing by with the tools, experience, and urgency to help protect your truck and your schedule.
Immediate Transmission Dispatch: 1-844-888-7587
24/7 Mobile Service | USA & Canada
Eaton Fuller - Allison - AMT - Clutches
MTS Truck Repair — Transmission Excellence. Roadside Speed. North American Reach.