Powertrain & Gearbox Testing - Clark Testing

Powertrain & Gearbox Testing


Clark Testing’s Powertrain & Gearbox Testing has been in the testing business for over 50 years. Over that time we have performed testing on products ranging from small components like starters and air motors to transmissions and axles in excess of 1000 horsepower. Our well-equipped facility is capable of testing vehicles, sub-assemblies, and individual components for a wide variety of tests on everything from heavy off-highway equipment to performance competition vehicles.

Our Powertrain & gearbox testing laboratory has years of experience in testing axles, brakes, bearings, clutches, gearboxes, torque converters, transaxles, transfer cases, transmissions, and driveshafts. We can also test electric motors with driving and overhauling loads up to 1300 horsepower. Note that we do not supply drive systems for test motors. Our bus bar system at Clark can supply up to 600 amps at 480 volts to power your motor drive, with 2300 volt supply options as well.

Full vehicle testing options include cooling system performance, driveline studies, and durability testing.

Testing Services



Test Equipment


  • Dynamometers (22)
    • Up to 1300 hp. motoring
    • Absorbing capabilities to 2400 hp.
    • Torques to 200,000 lb.-ft, speeds up to 12,000 RPM
  • Two Heavy Duty Chassis Dynamometers
    • Drawbar to 25,000 lbf @ 25 mph
    • Single axle span to 15 feet
    • Motoring and absorbing capability
    • One high speed chassis dynamometer (Speeds to 120 mph, Absorption only)
  • Inertia Simulation
    • Variable Inertia Flywheels
  • Engine Driven Tests

Component Testing


  • Durability, performance, development, & efficiency studies
    • Axles
    • Bearings
    • Brake System Simulations
    • Clutches
    • Electric Motors
    • Gearboxes
    • Torque Converters
    • Transaxles
    • Transfer Cases
    • Transmissions
    • Universal Joints

Full Vehicle Testing


  • Cooling System Performance
  • Driveline Studies
  • Durability
  • Full Vehicle

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Clark Testing has been providing product qualification testing and design verification for manufactures for over 20 years. We provide our clients with independent testing.

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View Our Accreditations

Clark Testing continuously operates under stringent quality assurance guidelines ensure all policies, practices and procedures meet or exceed industry standards. Clark’s QA/QC programs follow the accreditation guidelines of ISO 17025-2017, 10CFR50 Appendix B, NQA-1 and AIHA.

Quality & Accreditations

Powertrain & Gearbox Equipment

Clark Testing listing of available equipment in support of our Powertrain & Gearbox testing services.

Powertrain & Gearbox Test Equipment


Have a question or would like to request a quote? Call 888.325.8517 or Request a Quote