Credentials · License family
ASE T-Series (Medium/Heavy Truck)
ASE's truck technician certifications, T2 through T8. Recertification every five years keeps them current.
Read the full guide: ASE T-Series: The Advancement Currency →
Variants
- ASE T1 Gasoline Engines
Medium-heavy truck gasoline engines test. Not required for Master Medium-Heavy Truck status.
- ASE T2 Diesel Engines
Medium-heavy truck diesel engines test, the core certificate of the series.
- ASE T3 Drive Train
Clutches, transmissions and drive axles for medium-heavy trucks.
- ASE T4 Brakes
Air and hydraulic brake systems for medium-heavy trucks.
- ASE T5 Suspension and Steering
Suspension, steering and alignment for medium-heavy trucks.
- ASE T6 Electrical/Electronic Systems
Truck electrical and electronic systems test.
- ASE T7 Heating, Ventilation and Air Conditioning
Truck HVAC test; pairs in practice with EPA Section 609 certification for refrigerant work.
- ASE T8 Preventive Maintenance Inspection
Preventive maintenance inspection test, the natural study partner for DOT annual inspection work.
- ASE Master Medium-Heavy Truck Technician
Status recognised when a technician holds current certification in T2 through T8. T1 is not required. Not a separate test.
Verified requirements
| Where | Expires | Renewal | Continuing education |
|---|---|---|---|
| United States (federal) | Yes | 5 years | — |
Verified against the issuing authority. Always confirm current rules before acting.