ASE H3 Drive Train (Transit Bus) study plan
ASE H3 Drive Train (Transit Bus) · Give each week a clear focus.
8 weeks · About 6 hours per week
Drive Train Diagnosis and Repair
Identify the major components of a transit bus drive train and describe power flow from engine to wheels
Explain the function of the transmission, driveshaft, differential, and axle in a transit bus
List common drive train complaints and relate each to possible causes
Demonstrate safe shop practices for drive train diagnosis (lifting, blocking, PPE)
Your checkpoint
Create a labeled diagram of the drive train power flow and a list of 10 common complaints with at least two possible causes each.
Drive Train Diagnosis and Repair
Perform visual inspections of drive train components and document findings
Use a systematic diagnostic approach to isolate drive train noises and vibrations
Interpret diagnostic trouble codes (DTCs) related to transmission and driveline
Select and use appropriate measuring tools (dial indicator, torque wrench, micrometers) for drive train diagnosis
Your checkpoint
Complete a diagnostic worksheet for three hypothetical drive train noise/vibration scenarios, listing step-by-step isolation procedures and likely causes.
Drive Train Diagnosis and Repair
Diagnose common transmission malfunctions (slipping, harsh shifting, no engagement) using pressure and stall tests
Test and interpret electronic transmission control system inputs and outputs
Diagnose driveline vibration causes (driveshaft balance, U-joint wear, pinion angle)
Explain the procedure for checking and adjusting a differential assembly
Your checkpoint
Write a troubleshooting guide for three transmission and three driveline faults, including test procedures and decision points.
Drive Train Diagnosis and Repair & Transmission and Driveline Service
Outline the steps to remove and reinstall a transit bus transmission
Describe the procedure to inspect and replace a driveshaft and U-joints
Explain the process to diagnose and repair a differential and axle assembly
Identify special tools and equipment required for drive train repair
Your checkpoint
Produce a removal and installation checklist for a transmission and a driveshaft, including torque specifications and safety precautions.
Transmission and Driveline Service
Describe scheduled maintenance procedures for transmission and driveline components
Explain fluid types, capacities, and service intervals for transmissions and differentials
Perform fluid level checks and fluid/filter changes according to manufacturer procedures
Identify wear patterns and failure analysis for gears, bearings, and seals
Your checkpoint
Create a maintenance schedule table for transmission and driveline service, including fluid specifications and inspection points.
Transmission and Driveline Service
Diagnose and repair transmission shifting problems (manual and automatic)
Adjust and repair clutch linkages and retarders (if applicable)
Service and repair driveline components: U-joints, center bearings, slip yokes
Explain proper procedures for seal and gasket replacement to prevent leaks
Your checkpoint
Write a step-by-step repair procedure for a U-joint replacement and a transmission seal replacement, including safety and quality checks.
Drive Train Diagnosis and Repair & Transmission and Driveline Service
Apply a structured diagnostic strategy to a simulated drive train complaint from start to finish
Demonstrate proper use of service information and diagnostic tools
Verify repairs by performing road tests and interpreting results
Document a complete repair order including diagnosis, repair, and verification
Your checkpoint
Complete a mock repair order for a complex drive train fault, including diagnosis, repair steps, and post-repair verification.
Drive Train Diagnosis and Repair & Transmission and Driveline Service
Review all drive train diagnosis and repair objectives, focusing on weak areas
Practice answering ASE-style questions under timed conditions
Reinforce safety and environmental regulations related to drive train service
Develop a personal exam-day strategy and checklist
Your checkpoint
Score at least 80% on a 50-question practice test covering both domains, and list three areas for further review.
Milestones
Week 2: Can explain power flow and list common complaints with causes without references.
Week 4: Can outline removal and installation procedures for transmission and driveshaft, including safety steps.
Week 6: Can describe maintenance schedules and perform basic service procedures for transmission and driveline.
Week 8: Achieve 80% or higher on comprehensive practice test and have a review plan for missed topics.