Five free practice questions on drivetrain and transmissions: block E of the Red Seal 310T Truck and Coach Technician exam, about 17 of its 135 questions. They are in the exam's format: four options, one correct answer. Answer each one before opening the explanation. No account, no email.
01The questions
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A tractor with an automated transmission sets a code for clutch engagement out of range and shifts harshly on take-off. The clutch was replaced recently and the code appeared right after. What was most likely missed?
- Low transmission oil level.
- The clutch calibration.
- The wrong tire size parameter.
- A faulty ABS control module.
Show the answer
B. Correct. An AMT module controls the clutch by position and must learn the new clutch's touch point and travel through the manufacturer's calibration routine; without it the module engages the clutch based on the old clutch's worn dimensions, producing harsh engagement and an out-of-range code. The RSOS requires the technician to describe procedures to perform software updates and calibrations for automated transmissions and lists hard shifting among symptoms; the calibration is run with the service tool and the result verified on a road test.
Why not the others
A. Low oil causes noise and wear, not a clutch engagement position code right after a clutch replacement.
C. Tire size does not affect clutch engagement position.
D. ABS is unrelated to clutch engagement.
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A tractor's transmission jumps out of a particular gear under load or on deceleration, but stays in the others. What is the most likely cause?
- Low engine idle speed.
- Low clutch fluid.
- A worn detent or shift rail.
- A worn drive-axle pinion bearing.
Show the answer
C. Correct. Jumping out of one gear is that gear's engagement not being held: a worn detent ball and spring or shift rail notch letting the rail walk, worn sliding-clutch or gear-clutching teeth that have lost their locking taper, or a bent shift fork. The RSOS lists jumping out of gear among manual transmission symptoms and detent, shift rails, gears and synchronizers among components and faults; the technician checks the shift linkage and detents first, then the internal parts.
Why not the others
A. Idle speed has no effect on gear retention under load.
B. Clutch hydraulics affect release, not whether an engaged gear stays engaged.
D. Axle bearings cause noise and gear damage, not the transmission jumping out of gear.
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A driver reports the inter-axle differential lock on a tandem tractor no longer engages; the dash indicator does not light when the switch is operated. Where should the technician start?
- The transmission's range shift valve.
- The lock's switch, supply, actuator.
- The tire pressures on the drive axles.
- The crown and pinion adjustment.
Show the answer
B. Correct. The inter-axle lock is engaged by an air cylinder or electric actuator moving a shift fork; the RSOS lists inter-axle differential lock not working among drive axle symptoms, fork among components, and air and electric among activating methods. With no indicator light, the technician confirms the switch and its supply, checks air at the shift cylinder or voltage at the solenoid when commanded, then tests the cylinder or actuator; a broken or bent shift fork is the mechanical cause if the actuator works. The lock is tested stopped or rolling straight, never with wheels spinning.
Why not the others
A. The range valve shifts the transmission; it has no connection to the axle lock.
C. Tire pressure is unrelated to the lock's operation.
D. Gear adjustment affects noise and wear, not whether the lock engages.
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A straight truck's automatic transmission engages normally when cold but, once hot, delays engagement into drive and slips on take-off. Fluid level is correct and clean. What is the most likely cause?
- Worn seals or a weak pump, hot.
- A faulty low-air warning switch.
- The wrong tire size.
- Low engine coolant.
Show the answer
A. Correct. A transmission that works cold and slips hot is losing hydraulic pressure as the fluid thins with temperature: worn clutch piston seals or sealing rings leak more when hot, and a worn pump cannot maintain line pressure. The RSOS lists delayed shift and no gear selection among symptoms and pressure readings among tests; a main line pressure test at operating temperature against the manufacturer's specification confirms the loss, and the pump, seals or clutch packs are addressed in the rebuild. Fault codes for pressure or slip are retrieved alongside.
Why not the others
B. Air system warnings are unrelated to transmission engagement.
C. Tire size affects speed calculations, not hot engagement delay.
D. Low coolant would overheat the engine, but the complaint is transmission pressure loss with normal fluid.
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A tractor's transmission grinds when the driver tries to select first or reverse from a standstill, but shifts normally once rolling. The clutch does not slip. What should the technician check first?
- Clutch brake and free play.
- Worn drive-axle gears.
- Transmission oil level.
- The range shift air pressure.
Show the answer
A. Correct. Selecting a gear at a standstill on a non-synchronized transmission requires the input shaft to stop, which is the clutch brake's job when the pedal is pushed to the floor; if the clutch is out of adjustment so the pedal cannot reach the clutch brake, or the clutch brake is worn or broken, the input shaft keeps spinning and the gears grind. The RSOS lists difficult initial gear engagement and hard shifting among clutch symptoms and clutch brakes among the items inspected and adjusted. Free play and release travel are measured against the manufacturer's values first.
Why not the others
B. Axle gears are downstream and have nothing to do with initial engagement grinding.
C. Oil level does not affect whether the input shaft stops for initial engagement.
D. Range shifting affects high/low range selection while driving, not first-gear engagement at rest.
02Answer key
| Question | Answer | Sub-task |
|---|---|---|
| Q1 | B | Diagnoses automated transmissions |
| Q2 | C | Diagnoses manual transmissions and transfer cases |
| Q3 | B | Diagnoses drive axle assemblies |
| Q4 | A | Diagnoses automatic transmissions |
| Q5 | A | Diagnoses clutches |
03What block E covers
This block covers the drivetrain from the flywheel to the wheels. It includes clutches and clutch brakes, twin-countershaft manual transmissions with air range shifting, automatic transmissions and automated manual transmissions (AMT), PTOs, driveshafts, u-joints and centre bearings, tandem drive axles, inter-axle differential locks, crown and pinion setup, and hydraulic and electric driveline retarders.
The Red Seal Occupational Standard names this block “Services, diagnoses and repairs drive trains”. It carries 12.6% of the exam, about 17 of the 135 questions, split across seven tasks. The share column is each task's weight within the block, as the standard publishes it.
| Task and its sub-tasks | Share of block |
|---|---|
| Services, diagnoses and repairs clutches Services clutches; Diagnoses clutches; Repairs clutches | 13% |
| Services, diagnoses and repairs manual transmissions and transfer cases Services manual transmissions and transfer cases; Diagnoses manual transmissions and transfer cases; Repairs manual transmissions and transfer cases | 17% |
| Services, diagnoses and repairs automatic transmissions Services automatic transmissions; Diagnoses automatic transmissions; Repairs automatic transmissions | 15% |
| Services, diagnoses and repairs automated transmissions Services automated transmissions; Diagnoses automated transmissions; Repairs automated transmissions | 20% |
| Services, diagnoses and repairs driveline systems Services driveline systems; Diagnoses driveline systems; Repairs driveline systems | 12% |
| Services, diagnoses and repairs drive axle assemblies Services drive axle assemblies; Diagnoses drive axle assemblies; Repairs drive axle assemblies | 16% |
| Services, diagnoses and repairs drive train retarders Services drive train retarders; Diagnoses drive train retarders; Repairs drive train retarders | 7% |
04What the questions turn on
Grinding at a standstill
Selecting first or reverse at a standstill on a non-synchronized transmission relies on the clutch brake to stop the input shaft. If the release-bearing-to-clutch-brake clearance is out and the pedal cannot reach the clutch brake, the gears grind.
Calibrate the AMT clutch
An automated transmission controls its clutch by position and must learn a new clutch's touch point through the manufacturer's calibration routine. Skip it after a clutch replacement and expect harsh take-offs and a clutch engagement out-of-range code.
Driveline angles and phasing
Ride height sets the u-joint working angles, so a vibration that appears after suspension work points to angles out of range. A vibration after a two-piece shaft is reassembled can be a slip yoke installed a spline off, putting the joints out of phase.
Breathers protect the seals
A plugged breather traps pressure as the case heats and pushes oil past the seals, and on a cooling axle housing it can draw water in. Clean the breather before replacing seals, and treat milky gear oil as ruined.
05The other blocks
The 310T exam has 11 blocks. Each has its own page of free questions:
The 310T Truck and Coach Technician practice exam page describes the full question bank. How these questions are written and checked: how our questions are made. Found a mistake? Tell us and we will fix it.