ASE T5 Suspension & Steering practice test
The T5 test covers truck steering and suspension: integral power steering gears, kingpins, leaf and air spring suspensions, ride height valves, wheel-end service, and total vehicle alignment on tandem axles. Required for Master Truck status.
On a tandem air-ride tractor, worn torque rod bushings would MOST likely show up as:
How the T5 test works
50 scored questions
+ ~10 unscored research questions
75 minutes
computer-based, at a test center
$62 per test
plus one $34 registration fee per order
Valid 5 years
then a shorter recertification test
ASE does not publish a fixed passing percentage — scores are scaled. Around 65–70% correct is the commonly cited range; aim above 80% in practice so you walk in with margin. The certificate is issued once ASE verifies your required work experience.
What the T5 test covers
The official task list for T5 Suspension & Steering (Medium-Heavy Truck) breaks down into these content areas — the practice bank above draws from all of them:
- Steering column, gear, and linkage — integral power gears, drag link, kingpins
- Suspension systems — leaf springs, air springs, ride height control valves
- Wheel bearings — adjustment and TMC-style procedures
- Wheels and tires — duals, matching, and wear diagnosis
- Total vehicle alignment — steer axle, tandem thrust and scrub angles, frame
Frequently asked
- How many questions are on the ASE T5 test?
- The T5 test has 50 scored questions plus about 10 unscored research questions, with a 75-minute time limit.
- How does truck alignment differ from car alignment?
- The same angles apply at the steer axle, but trucks add rear-axle thrust and tandem scrub angles, frame squareness, and axle positioning — misaligned tandems drag tires and burn fuel.
- What is a kingpin?
- The steel pin that the steer-axle knuckle pivots on in a solid I-beam axle. Kingpin and bushing wear is measured with a dial indicator while the wheel is levered — a core T5 task.
Other ASE practice tests
Driving trucks, not just wrenching on them?
HaulSchool has free CDL practice tests — general knowledge, air brakes, and every endorsement — plus plain-English DOT physical guides.
Free CDL practice tests at HaulSchool →