United States Army careers
Wheeled Vehicle Mechanic hero
91B
engineering
CMF 91 - Mechanical MaintenanceCombat Service SupportUnited States Army

Wheeled Vehicle Mechanic

Maintain and repair the Army's wheeled vehicle fleet from HMMWVs to HEMTTs.

Difficulty · moderateFitness · high Requirements being verifiedActive DutyReserveNational Guard

Job Overview

91B Wheeled Vehicle Mechanics keep the Army moving. They diagnose, repair, and maintain trucks, generators, and tactical vehicles across every environment.

You gain deep hands-on diesel and gasoline mechanic experience, plus electrical and hydraulic systems training that transfers directly to civilian trucking and heavy equipment shops.

History & Deep Dive

AI-assisted

Writing a detailed history and deep dive… first visit takes ~5 seconds, then it's cached forever.

Daily Responsibilities

  • Diagnose engine, transmission, and electrical faults
  • Perform scheduled and unscheduled maintenance
  • Repair braking, steering, and suspension systems
  • Recover disabled vehicles
  • Maintain the unit's maintenance records in GCSS-Army
Work schedule
Standard shop hours in garrison; long field rotations during exercises.
Environment
Motor pool bays, field maintenance sites, and forward maintenance points.
Supports
Every unit — infantry, armor, artillery, aviation — depends on 91Bs.

Training Pipeline

  1. 1
    Basic Combat Training
    Fort Jackson / Fort Leonard Wood · 10 weeks
  2. 2
    AIT — 91B
    Fort Lee (Fort Gregg-Adams), VA · 14 weeks

    Diesel and gasoline engines, drivetrains, electrical systems, hydraulics, and Army maintenance procedures.

Official Qualification Requirements

Army line score

Requirements being verified against the official service publication. We do not display unofficial or estimated scores — contact a recruiter for the current minimum.

Security clearance

No clearance listed

Requirements are subject to change by the Department of Defense and each service. Always confirm the current standard with an official recruiter before making a decision.

U.S. citizenship
Green card holders eligible

Not required. GoArmy.com states you must "be a U.S. citizen or permanent resident with a valid Green Card" to enlist, so green card holders qualify for this job (also 10 U.S.C. 504). Source: goarmy.com/how-to-join/requirements. Citizens of the Freely Associated States (Micronesia, Marshall Islands, Palau) may also enlist under 10 U.S.C. 504. Verified August 2026 against the official branch site, 10 U.S.C. 504, and AR 601-210 (20 March 2026).

Physical requirements
Moderate to high — lifting engine components, wrestling truck tires, and long days on your feet.
Required skills
Diesel/gasoline engine repairElectrical diagnosticsHydraulicsPreventive maintenanceGCSS-Army records
AI Concept Gallery
AI-generated concept illustrations · not official photos
Portrait · AI illustration
Training · AI illustration
Workplace · AI illustration
Equipment · AI illustration
Operational · AI illustration

Video Library

Career Progression

PVT
PV2
PFC
SPC
SGT
SSG
SFC
MSG/1SG

Progress to shop foreman, motor sergeant, and warrant officer (915A) paths.

Assignments & Special Schools

Duty stations
  • Fort Gregg-Adams, VA
  • Fort Cavazos, TX
  • Fort Bragg, NC
  • Fort Bliss, TX
  • Overseas: Germany, Korea
Special schools
Warrant OfficerRecovery specialistMaster DriverInstructor

Deployment: Deploys with brigade support battalions; often forward-deployed with maneuver units.

Bonuses & Special Pay

enlistment bonus
Frequently available for 91B contracts
reenlistment bonus
Consistently offered

Bonus availability changes frequently — confirm current amounts with a recruiter.

Lifestyle & Work-Life Balance

Very steady garrison lifestyle with predictable hours; hands-on trade work every day.

Physical Fitness

Level · high

Aim for 440+; grip and back strength matter most.

Suggested preparation
  • Deadlifts and rows
  • Farmer carries
  • Overhead press
  • Forearm and grip training

Advantages

  • Deep, transferable trade skill
  • Steady work in garrison
  • Great foundation for civilian ASE certifications
  • Real ownership of the fleet

Disadvantages

  • Hard physical work
  • Exposure to fluids, heat, and cold
  • Long field maintenance days
  • Repetitive maintenance cycles

Who Should Choose This MOS?

People who love working with their hands, engines, and building lifelong trade skills.

Civilian Career Equivalents

Diesel Mechanic

Direct transfer; ASE-track career after service.

Fleet Maintenance Technician

Trucking companies actively recruit 91B veterans.

Automotive Service Manager

Leadership experience opens shop-management roles.

Career Match Scores
Physical Demand70
Mental Demand70
Leadership60
Technical Level85
Travel55
Deployment Potential70
Civilian Transferability93
AI Career Advisor
Context: 91B Wheeled Vehicle Mechanic