About Heavy Duty Transaxle

Since 1995, Heavy Duty Transaxle has proudly served the off-road transportation industry, offering expert solutions to keep your vehicles and equipment performing at their best. 

Who we are

Heavy Duty Transaxle offers self-paced online training built for the off-highway and industrial drivetrain industry. From OEMs and mines to service shops and individual techs, our courses focus on practical maintenance, troubleshooting, and application engineering—giving teams the skills they need on the job.
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Our purpose

Our team is our greatest asset—experienced technicians and instructors focused on reliability, safety, and performance. We’re committed to serving OEMs, fleets, service centers, and the wider community through practical training and support. Our emphasis is on people, skills, and continuous learning.
Have a question about our courses, pricing, or bundle programs? Feel free to contact us.

Trusted around the globe

Clients

Projects

5-star ratings

Why choose us

We help off‑highway and industrial drivetrain teams hit their goals: more uptime, lower costs, and safer work. From spec reviews to troubleshooting and parts planning, our instructors bring real field experience with axles, differentials, brakes, and transmissions—so you’re paired with the right expert for your operation.

Comprehensive, Equipment-Focused Training

In-depth instruction on planetary axles, transmissions, brake systems, safety, tooling, and equipment-specific procedures for Kenworth, Western Star, Taylor forklifts, and more.

Affordable and flexible

Get high-impact training that fits your budget and your schedule.

Real World Education, Real World Credibility

Built for the field, recognized by the pros, and designed to advance your career.

Marty Smith - Instructor

Marty Smith is a seasoned expert in the repair, rebuilding, and training of heavy-duty axles, with extensive hands-on experience in both civilian and military environments. A former heavy-wheeled mechanic in the US Army, Marty honed his skills working on Meritor, AxleTech, Kessler, and other leading axle brands. His background includes cross-training in powertrains, planetary systems, and high-precision assemblies, giving him unparalleled expertise in axle systems and related components.
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Get in touch

  • 16849 146th St. SE, Monroe, WA 98272
  • training@hdtransaxle.com
  • +1 888 383-3301

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