Maintenance & repair · Etna, Wyoming

We keep specialty 4x4s working.

You do not need a full restoration or custom build to bring us your vehicle. We provide practical maintenance, troubleshooting, and repair for HMMWVs, FJ40s, Defenders, military platforms, and other specialty 4x4s.

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ServiceMaintain · Diagnose · Repair
PlatformsHMMWV · FJ40 · Defender · 4x4
LocationEtna, Wyoming

Not every truck needs a rebuild

Service it. Fix it. Keep driving it.

Specialty vehicles still need ordinary care. We handle the maintenance and repair work that keeps them safe, dependable, and ready for the next trip.

Dietrick & Wilson Overland works on these vehicles at every stage of ownership—not only during major restorations and custom conversions.

Whether you recently bought a HMMWV that needs a complete inspection, have an FJ40 with a drivability problem, or need routine service on a Defender or overland vehicle, we can evaluate the issue and establish sensible priorities. We focus first on safe operation, reliability, and serviceability.

We can also help owners understand what needs attention now, what can be monitored, and what belongs in a future improvement plan. That makes regular maintenance useful on its own while giving larger projects a better foundation if the vehicle eventually grows into one.

  • Routine inspections, fluid checks, filter changes, and lubrication
  • Brake, steering, suspension, wheel-end, and driveline concerns
  • Cooling system, belts, hoses, leaks, and overheating diagnosis
  • Starting, charging, battery, lighting, and basic electrical repair
  • Fuel delivery, drivability, unusual noise, and general troubleshooting

Basic service backed by platform knowledge.

We look at routine work in the context of an older, specialized, or heavily modified vehicle.

01 / PREVENT

Routine maintenance

Fluid and filter service, lubrication, condition checks, and scheduled attention that helps catch wear before it becomes a larger repair.

02 / FIND

Diagnostics

Track down starting, charging, cooling, braking, steering, drivability, noise, leak, and basic electrical concerns.

03 / REPAIR

Mechanical work

Repair or replace worn and failed components, then review the related systems that may have contributed to the problem.

Straightforward service

Start with the concern in front of you.

Bring us the symptom, maintenance need, or list of known issues. We will begin there and help separate immediate repairs from optional future work.

  1. 01

    Tell us what is happening

    Share the platform, symptoms, recent work, known history, and how the vehicle is normally used.

  2. 02

    Inspect and diagnose

    Check the affected system and the surrounding components needed to understand the problem.

  3. 03

    Set priorities

    Separate safety and reliability needs from maintenance items and longer-term improvements.

  4. 04

    Complete the agreed work

    Perform the authorized service or repair and review the result as part of the complete vehicle.

When the project grows

From routine service to a complete build.

PlatformHMMWV & Humvee builds → RestoreMilitary vehicle restoration → TravelCustom overland builds →

Need service or have a problem to diagnose?

Tell us what you drive, what it is doing, and what maintenance or repair it needs.

Request service307-249-6511