Diesel Engine Repair
Hard starts, derates, loss of power, overheating, oil leaks, turbo issues, and drivability concerns on all major diesel platforms.
(801) 388-7233
Dispatch@MightyFleetServices.com
Semi Truck and Trailer Repair in Utah
Mighty Fleet Services provides semi-truck and trailer repair throughout Salt Lake County, north through Davis and Weber County, extending toward Logan and Evanston.
Semi Truck Repair
When a semi truck or trailer goes down, the impact is immediate. Loads are delayed, drivers are stranded, and costs climb by the hour. Mighty Fleet Services provides semi-truck repair in Utah. Our truck mechanics diagnose and repair issues affecting engines, brakes, suspension, cooling systems, electrical components, drivetrains, and other systems that directly impact semi-truck performance and safety.
Whether a truck is overheating, losing braking efficiency, throwing fault codes, or experiencing handling problems under load, our experienced diesel-engine semi-truck mechanics work to restore safe operation. Choose our mobile roadside service for emergency semi truck repairs, or visit us for repairs at our Bountiful repair facility.
Call us 24/7 for semi-truck repairs in Utah.
Semi Truck Brands We Service
Our technicians service all Class 6–8 tractors on the road today, from long-haul sleepers to vocational day cabs.
Trailer Brands We Service
GREAT DANE
WABASH
UTILITY
HYUNDAI TRANSLEAD
STOUGHTON
FONTAINE
REITNOUER
EAST
Semi Truck Repair
Full-service diagnostics and repair for day cabs, sleepers, and over-the-road tractors serving Salt Lake County and the greater Wasatch Front.
Air Brake Service
Air leaks, low pressure, valves, chambers, slack adjusters, compressors, and full air system repair for tractors.
Electrical & Charging
Batteries, starters, alternators, wiring, sensors, ECM communication, and no-start diagnostics.
DPF, DEF & Aftertreatment
DPF cleaning, forced regens, SCR/DEF faults, EGR issues, and derate troubleshooting to keep trucks earning.
Cooling System Repair
Radiators, water pumps, hoses, thermostats, fans, and coolant leak repair for heavy-duty diesel.
Fuel System Repair
Injectors, fuel pumps, filters, contamination, and low-power fuel delivery issues.
Turbocharger Service
Boost loss, exhaust smoke, and turbo-related performance issues diagnosed and repaired.
Transmission & Clutch Support
Shifting concerns, clutch replacement support, driveline vibration, and U-joint service.
Steering & Suspension
Airbags, leaf springs, shocks, kingpins, tie rods, and ride-quality complaints on Class 8 tractors.
Fifth Wheel Service
Fifth wheel lubrication, inspection, kingpin wear, and coupling system repair.
Preventative Maintenance
Full PMs with oil, filters, fluids, brake checks, tire inspection, and DOT-ready reporting.
DOT Inspections
Annual and pre-trip inspections to keep tractors in compliance and out of the CVSA out-of-service pile.
Semi Trailer Repair
Dry vans, flatbeds, reefers, tankers, and specialty trailers — brakes, lights, wiring, suspension, doors, and structural repair.
Trailer Brake Repair
Air brake service, ABS diagnostics, brake chambers, shoes, drums, and slack adjusters on all trailer types.
Trailer Lights & Wiring
Marker lights, brake/turn signals, wiring harnesses, plugs, sockets, and 7-way connector repair.
Suspension & Airbag Repair
Air ride bags, leaf springs, hangers, shocks, height control valves, and trailer alignment concerns.
Landing Gear Repair
Bent legs, broken crank handles, worn gearboxes, and full landing gear replacement.
Wheel End & Hub Service
Hubs, bearings, seals, wheel end leaks, and hot hub / dragging brake diagnosis.
Trailer Door Repair
Roll-up doors, swing doors, hinges, latches, tracks, cables, and header damage.
Liftgate Repair
Hydraulic and electric liftgate diagnostics, motors, pumps, switches, and wiring.
Reefer Trailer Support
Electrical, structural, and mechanical support for refrigerated trailers. Ask about reefer unit scope.
Kingpin & Coupling Inspection
Kingpin wear, upper coupler plate, and pintle hook inspection to keep trailers legal and safe.
Trailer Wiring Harness Repair
Full harness replacement, connector rebuilds, and hard-to-find intermittent electrical faults.
Trailer DOT Inspections
Annual inspections and pre-trip help for dry vans, flatbeds, tankers, and specialty trailers.
Roadside Trailer Repair
Blown tires, dragging brakes, light-outs, and air leaks handled on the shoulder or at your yard.
Mobile & Emergency Service
Downtime hurts. We come to you across Salt Lake County — jobsites, yards, truck stops, and the I-15 / I-80 corridor.
Emergency Roadside Assistance
Emergency mobile response for breakdowns, no-starts, air leaks, jump starts, and stuck trucks.
On-Site Fleet Service
Scheduled and unscheduled repair at your yard so trucks stay on your property, not in a shop bay.
Jump Starts & Battery Swaps
Fast battery diagnostics and replacement on cold mornings when a truck won't crank.
Air System Emergency Repair
Blown air lines, failed valves, and dropped-pressure issues that put a rig out of service.
DPF Regen Assistance
Forced regens and DPF-related derate help when a truck is stranded and won't clear codes.
Fluid & Leak Emergency Repair
Coolant, oil, fuel, and hydraulic leaks stopped fast so you can get moving again.
SERVICE AREA
Semi-Truck & Trailer Repair Service Area
Mighty Fleet Services supports semi truck and trailer repair across Northern Utah. Our service area is designed to support major freight corridors, regional routes, and local fleet operations.
We regularly service trucks operating throughout Salt Lake County, Davis County, and Weber County, with coverage extending north toward Logan and east toward Evanston. This allows us to support trucking operations moving freight through Utah as well as vehicles staged at yards, terminals, job sites, and distribution points.
Whether a semi truck needs roadside assistance or scheduled repair, our fleet repair service allows us to respond efficiently and keep freight moving.
Semi-Truck Trailer Repair
Problems with a semi-truck trailer can stop a load just as fast as issues with the truck. Our semi-trailer repair services cover a wide range of mechanical and operational issues, including brake systems, wheels and hubs, suspension components, lighting and wiring, and coupling systems.
We also repair trailer lift gates, landing gear, and trailer components that fail under repeated loading and unloading. For refrigerated trailers, we address electrical and mechanical issues that affect temperature control, power delivery, and safe operation.
By servicing trailers alongside semi-trucks as needed, we help reduce delays and keep freight moving without unnecessary transfers or downtime.
Semi Truck Tire Repair
Tire problems are one of the most common reasons semi trucks end up on the shoulder. Mighty Fleet Services provides semi-truck tire repair and tire replacement in Utah.
At our Bountiful, Utah semi truck tire shop, we repair and replace semi truck tires when wear, damage, or air loss makes it unsafe to stay on the road. We work with tires for semi trucks that are designed for commercial loads and long-haul use, helping drivers and fleet managers get back on schedule without unnecessary delays.
When a truck cannot safely make it to our shop, our mobile semi truck repair service can respond roadside to repair or replace tires and get the vehicle moving again.
Semi Truck and Trailer Repair FAQ
Can a semi truck driver perform a tire repair on a semi truck?
A semi truck driver may perform minor, temporary tire repairs such as plugging or patching small tread punctures if properly trained and equipped. However, sidewall damage, blowouts, or tire removal should be handled by professional technicians due to safety risks and DOT regulations.
Is it legal to drive a semi truck after a temporary tire repair?
Temporary tire repairs are intended only to move a truck to a safe location or repair facility. Continuing operation without proper repair or replacement can lead to violations, safety risks, and further tire damage.
What trailer issues commonly cause DOT violations?
Roadside repairs are often used to restore safe mobility and prevent extended delays. Some issues can be fully resolved roadside, while others may require follow-up service at a repair shop depending on severity and safety considerations.
Are roadside semi truck repairs meant to finish the job or get the truck moving?
Response time depends on location, vehicle condition, and service demand. For urgent fleet repairs, our mobile fleet mechanics prioritize vehicles that are actively impacting operations and work to respond as quickly as possible across Northern Utah.