Glendive, Montana
Semi Truck Repair in Glendive, MT
Mondak repairs Class 5 through 8 commercial trucks from the Glendive shop, just off I-94. That covers highway tractors, day cabs, dump trucks, service trucks and vocational units. Work includes engines, air brakes and air systems, electrical, aftertreatment, cooling, driveline, wheel ends, cab HVAC, PTO and wet kits, and routine PM. Our technicians work on common powertrains from Cummins, Detroit, Caterpillar and PACCAR, in chassis from Freightliner, Peterbilt, Kenworth, International, Mack and Volvo. Whether the truck is down for a derate or due for maintenance, the goal is to diagnose correctly and get it back on the road.
Service at a glance
- Equipment
- Class 5–8 tractors, straight trucks, vocational trucks and day cabs from Freightliner, Kenworth, Peterbilt, International, Mack, Volvo and others
- Common problems
- Derates, air-brake and ABS warnings, charging faults, aftertreatment codes, driveline vibration, fuel leaks, no A/C
- Systems
- Diesel engines, air brakes, wheel ends, electrical and J1939 networks, DPF/EGR/SCR, clutch and transmission, PTO/wet kits
- Service
- Glendive shop bays for major repair; roadside and yard diagnosis where the truck can be worked on safely
WHAT WE SERVICE
Work tied to the actual fault.
- Engine diagnostics, repair and performance complaints
- Air brakes, air dryers, valves and air leaks
- Electrical, lighting, starting and charging
- DPF, EGR, SCR and DEF aftertreatment repair
- Driveline, U-joints and wheel-end work
- Cab HVAC and A/C repair
- PTO, wet kit and preventive maintenance
COMMON NEEDS
- Derate or loss of power on the highway
- Air pressure dropping or slow build-up
- Overheating on a grade or under load
- Vibration from the driveline at speed
- No A/C or no heat in the cab
- Wet kit not engaging or low hydraulic output
THE MONDAK APPROACH
Diagnose first. Repair with purpose.
We start with what the driver saw and heard, then pull codes and live data. Engine and aftertreatment problems often overlap, so we test before replacing parts. Estimates come before work, and we call if anything changes.
Roadside calls along I-94 cover hoses, air leaks, electrical and no-starts where practical; in the Dickinson area a resident Mondak field technician handles those calls locally. Engine, transmission and heavy aftertreatment work happen in the Glendive shop.
RELEVANT EQUIPMENT & BRANDS
Brand references indicate service familiarity, not authorized dealer or factory status.
COMMON QUESTIONS
Questions about semi truck repair
RELATED FIELD NOTES
From real jobs.
GLENDIVE, MONTANA
Tell us what’s down.
Share the unit, location and symptoms. We’ll help determine the practical next step.