ASE A3
Manual Drive Train & Axles (A3)
The ASE A3 Manual Drive Train & Axles test covers clutches, manual transmissions and transaxles, drive and half shafts, drive axles and differentials, and four-wheel/all-wheel drive systems. It is taken by technicians who service driveline components and counts toward ASE Master Automobile Technician status.
- Questions you sit
- 50
- Scored
- 40
- Time allowed
- 60 min
- GearheadPass questions
- 168
From ASE's 2026 study guide. The test includes 10 unscored research questions you can't tell apart from the scored ones.
Content areas and weights
| Content area | Questions on the test | Share | Free practice |
|---|---|---|---|
| Clutch | 6 | 15% | 5 questions → |
| Transmission | 7 | 18% | 5 questions → |
| Transaxle | 7 | 18% | 5 questions → |
| Drive/Half Shaft & U/CV Joints | 5 | 13% | 5 questions → |
| Drive Axle | 7 | 18% | 5 questions → |
| Four-Wheel/All-Wheel Drive | 8 | 20% | 5 questions → |
Study each area
A3 · 6 questions on the test
Clutch
Diagnosing and repairing clutch systems: pedal and hydraulic release components, release bearing, disc and pressure plate, pilot bearing, flywheel and powertrain mounts.
A3 · 7 questions on the test
Transmission
Rear-wheel-drive manual transmission work: shifting and noise diagnosis, external linkage, overhaul of shafts, gears and synchronizers, preload and endplay, and electronic parts.
A3 · 7 questions on the test
Transaxle
Front-wheel-drive manual transaxle work: shifting and noise diagnosis, removal and mounts, internal gears and synchros, the built-in differential, preload, lubrication and electronics.
A3 · 5 questions on the test
Drive/Half Shaft & U/CV Joints
Servicing drive shafts and half shafts on front- and rear-drive vehicles: noise and vibration diagnosis, U-joints and CV joints, balance, runout, working angles and wheel bearings.
A3 · 7 questions on the test
Drive Axle
Rear drive axle service: ring and pinion setup, differential case work, limited slip and locking units, and axle shafts, bearings and housings.
A3 · 8 questions on the test
Four-Wheel/All-Wheel Drive
Diagnosing and servicing 4WD and AWD systems: transfer case removal and overhaul, shafts and front axles, engagement and actuation controls, and tire size matching.
Take a full-length A3 mock in the app
50 questions in 60 minutes, weighted like the real test, scored by content area, with English or Spanish on every question.
