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Diagnostics & Technology

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BlogDiagnostics & Technology

Heavy Truck ABS Diagnostics: Complete Fleet Guide [2025]

Master heavy truck ABS diagnostics with proven techniques for wheel speed sensors, trouble codes, and systematic testing. Essential guide for fleet technicians.
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BlogDiagnostics & Technology

Diesel Diagnostic Certification: Complete Guide [2025]

Learn how to earn diesel diagnostic certification in 2025. Explore ASE credentials, training programs, costs, and career opportunities for diesel technicians.

Preventative Maintenance

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Transmission Fluid Analysis: Predictive Maintenance for Fleets

Transmission fluid analysis for fleets: what wear metals reveal, how to interpret results, and how to build a program that prevents costly transmission failures.

Heavy Duty Cooling System Maintenance: Complete Fleet Guide

Learn heavy duty cooling system maintenance best practices. Prevent the 25% of engine failures caused by cooling problems with this comprehensive fleet guide.
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The HDJ Diesel Mechanic Tools Guide

96 professional tools across 9 categories — curated from 15+ years in the trade.

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AI & Fleet Technology

Fleet Safety & Compliance

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Shop Operations & Workflow

HDJ Buyer's Guide
Heavy-Duty Products & Solutions Worth Exploring

Explore tools, equipment, software and industry solutions selected for fleet managers, shop owners and heavy-duty professionals.

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Owner Operator

BlogOwner Operator

Diesel Mechanics Near Me: 2025 Guide to Finding Certified Pros

Find qualified diesel mechanics near you with our 2025 guide. Learn certification verification, pricing, red flags, and how to evaluate ASE-certified technicians.

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Tools & Equipment Reviews

BlogTools & Equipment Reviews

Heavy Duty Impact Wrench Guide: Cordless vs Air 2025

Discover the best heavy duty impact wrenches for professional mechanics and DIY enthusiasts. Compare top cordless and pneumatic models with detailed specs and real-world testing results

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Expert Insights for Fleet Success

Actionable strategies from industry professionals trusted by fleet managers, shop owners and heavy-duty professionals.

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Fleet Telematics ROI: The Complete Executive Pitch Guide.

How to build a fleet telematics ROI pitch that gets $50K+ approved — baseline data over vendor claims, objection handling, and the angle CFOs respond ...
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Customer Service & Marketing

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BlogCustomer Service & Marketing

Backlinks for Truck Repair Shops: A Proven, Complete Guide

By Michael Nielsen, Publisher | 15+ Years in Diesel Repair Last Updated: September 2026 ⏱ ...
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BlogCustomer Service & Marketing

Get Your Truck Repair Shop Featured in Trade Press

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Fuel Systems & Injection Technology

BlogFuel Systems & Injection Technology

Diesel Fuel Filter Maintenance: Complete Guide [2025]

Learn diesel fuel filter replacement intervals, warning signs, and step-by-step procedures. Protect your engine's injection system with proper maintenance.
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Diesel Mechanic Tools Guide

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Buyer’s Guides

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Buyer's Guides

Best DPF Cleaning Equipment for Diesel Shops: Complete Comparison Guide

FSX, Redline Emissions Products, EcoClean, and Enviromotive compared on cleaning method, throughput, and total cost of ownership — plus the questions to ask before any ...
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Service manager using digital shop management software on a tablet while diesel technicians perform repairs on a Class 8 semi truck inside a modern heavy-duty repair facility.
Buyer's Guides

ShopView: Shop Management Software Built for Heavy Duty Repair Shops

Compare ShopView, Fullbay, AutoLeap, and Shopmonkey for heavy duty repair. Honest evaluation of labor capture, workflow speed, AI tools, and what contracts actually say.
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Compliance & Safety Management

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Ask the Experts Q&A

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Ask the Experts Q&A

Diesel Low Fuel Pressure: Complete Diagnostic Guide

Learn to diagnose and repair diesel low fuel pressure problems. Complete guide covers symptoms, causes, testing procedures, and preventive maintenance for fleets.
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Heavy-Duty Diesel Knowledge Hub: Free Expert Resources for Technicians, Fleet Managers & Owner-Operators

Discover how diesel technicians, fleet managers, and shop owners share field-tested expertise through Heavy Duty Journal's contributor-driven publication model.
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Diesel mechanic tools guide featuring diagnostic equipment, socket sets, power tools, and essential heavy-duty shop equipment.
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The Working Tech's Tool Guide

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🔧 Shop & Bay 🔍 Diagnostic ⚙️ Engine 🔩 Drivetrain 💨 Air & Brake 🚛 Service Truck 🏗️ Heavy Equipment 🦺 PPE & Safety 🛞 Tire Repair
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