A heavy-duty truck with a pull-type clutch will not fully disengage, causing hard shifting. Which adjustment is most likely required?
Clutch
Question · Medium
What is the primary function of a clutch brake on a non-synchronized heavy-truck transmission?
Question · Easy
Introduction & Drive Train Fundamentals
1.1 ASE T3 Exam Format, Scoring, and Technician A/B Question Strategy
Study guide
Technician A says a clutch brake should be used only when shifting into a starting gear from a complete stop. Technician B says the clutch brake should be applied at every upshift to speed the shift. Who is correct?
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A self-adjusting heavy-truck clutch maintains correct release-bearing clearance by:
A clutch shudders (chatters) when engaging from a stop. Which of these is the LEAST likely cause?
On a typical heavy-truck clutch, clutch-brake squeeze should begin when the pedal is:
1.2 Medium/Heavy Truck Drive Train Architecture and Shop Safety
On a pull-type clutch, what does the term 'free pedal' (free travel) measure?
A driver reports the clutch slips under heavy load but engages normally at light load. The most likely cause is:
What is the purpose of the intermediate (center) plate in a two-plate (twin-disc) heavy-truck clutch?
A clutch will not release fully even with correct linkage adjustment, and the discs show heavy heat checking. Which internal cause is most likely?
Question · Hard
Clutch Construction & Actuation Systems
2.1 Push-Type vs. Pull-Type Clutches and Two-Plate Construction
Excessive flywheel face runout on a heavy-truck clutch will most likely cause:
When measuring flywheel housing bore (pilot) runout and face runout before installing a clutch, the technician should use:
With a removed transmission in neutral, the input shaft feels rough when rotated and has excessive radial play. Which component is most likely worn?
A clutch noise begins as soon as the pedal lightly loads the release mechanism, before the clutch disc disengages. Which component is most likely worn?
2.2 Clutch Release Linkages, Hydraulic Systems, and Free Pedal Adjustment
Which lubricant practice is correct for a typical heavy-truck release (throw-out) bearing and cross-shaft?
Technician A says oil contamination on clutch facings can come from a leaking rear main seal. Technician B says it can come from a leaking transmission input-shaft seal. Who is correct?
A hydraulic clutch pedal sinks to the floor and does not return, and the reservoir level is low. What is the most likely cause?
What is the function of the angle-spring (or coil-spring) pressure plate cover in a heavy-truck clutch?
2.3 Clutch Brake Operation, Types, Clearance, and Squeeze Adjustment
An automated clutch was replaced and adjusted, but the truck now launches harshly with no active fault code. What should be done next?
Why should a technician support a heavy-truck transmission while removing it for clutch service?
Why is a clutch alignment tool (arbor) used during clutch installation?
A heavy-truck clutch disc is found installed backward (raised hub toward the flywheel) during teardown. The most likely symptom this caused was:
2.4 Release Bearings, Cross-Shafts, Clutch Safety Switches, Input Shaft Wear, and Clutch Torque Ratings
On a manually adjusted heavy-truck clutch, rotating the internal adjusting ring is done primarily to:
Which condition would most likely cause a heavy-truck clutch to grab (engage too abruptly)?
A two-pedal automated manual transmission (AMT) with an automated clutch reports a fault that the clutch is overheating during repeated low-speed maneuvers. The best technician explanation is:
What is the correct way to handle a clutch driven disc with friction facings during installation?
Clutch Adjustment, Maintenance & Troubleshooting
3.1 Manual vs. Self-Adjusting Clutches and Internal Adjustment Procedures
A heavy-truck clutch linkage uses an over-center (assist) spring. If this spring is broken, the most likely complaint is:
During clutch replacement, the flywheel friction surface shows deep heat-check cracks and hard spots. The correct action is:
Air reaches the range-shift cylinder of a heavy-truck transmission, but the piston does not complete the shift into high range. Which fault is most likely?
Transmission
In a Roadranger-style twin-countershaft transmission, the main shaft 'floats' so that:
3.2 Flywheel Inspection, Resurfacing, Pilot Bearings, and Housing Alignment
What is the function of the splitter section in a heavy-truck range-splitter transmission?
A driver complains a non-synchronized twin-countershaft transmission grinds going into gear from a stop. Both countershafts and gears appear good. The most likely cause is:
Technician A says low air pressure can prevent a range shift from completing on an air-shift heavy-truck transmission. Technician B says a plugged transmission air filter/regulator can cause slow or incomplete range shifts. Who is correct?
A transmission temperature gauge reads hot immediately after a cold start, but an infrared check shows the housing is near ambient temperature. What should the technician do next?
3.3 Diagnosing Slip, Chatter, Drag, and AMT Clutch Actuators & Calibration
A heavy-truck transmission is overfilled with gear oil. The most likely result is:
A gear-driven transfer case develops a sharp knock under load in every selected range. One gear has a chipped tooth. Which repair is required?
A transmission whines in every gear except direct drive. The most likely cause is:
On an automated manual transmission (AMT), gear selection and clutch actuation are controlled by:
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