This course covers the operation, diagnosis, and repair of manual transmissions/transaxles, clutches, drive shafts, axles, and final drives. Topics include theory of torque, power flow, and manual drive train service and repair using appropriate service information, tools, and equipment. Upon completion, students should be able to explain operational theory and diagnose and repair manual drive trains.

Prerequisites: TRN 110, TRN 120, DRE 097 or appropriate placement test score.

Corequisites: AUT 231A

Class Hours: 2        Lab Hours: 3        Clinical/Work Exp.: 0        Credit Hours: 3


General Drive Train Diagnosis

  • Identify and interpret drive train concerns; determine needed action.

  • Research vehicle service information including fluid type, vehicle service history, service precautions, and technical service bulletins.

  • Check fluid condition; check for leaks; determine needed action.

  • Drain and refill manual transmission/transaxle and final drive unit; use proper fluid type per manufacturer specification.

Clutch Diagnosis and Repair

  • Diagnose clutch noise, binding, slippage, pulsation, and chatter; determine needed action.

  • Inspect clutch pedal linkage, cables, automatic adjuster mechanisms, brackets, bushings, pivots, and springs; perform needed action.

  • Inspect and/or replace clutch pressure plate assembly, clutch disc, release (throw-out) bearing, linkage, and pilot bearing/bushing (as applicable).

  • Bleed clutch hydraulic system.

  • Check and adjust clutch master cylinder fluid level; check for leaks; use proper fluid type per manufacturer specification.

  • Inspect flywheel and ring gear for wear, cracks, and discoloration; determine needed action.

  • Measure flywheel runout and crankshaft end play; determine needed action.

  • Describe the operation and service of a system that uses a dual mass flywheel.

Transmission/Transaxle Diagnosis and Repair

  • Inspect, adjust, lubricate, and/or replace shift linkages, brackets, bushings, cables, pivots, and levers.

  • Describe the operational characteristics of an electronically-controlled manual transmission/transaxle.

  • Diagnose noise concerns through the application of transmission/transaxle powerflow principles.

  • Diagnose hard shifting and jumping out of gear concerns; determine needed action.

  • Diagnose transaxle final drive assembly noise and vibration concerns; determine needed action.

  • Disassemble, inspect clean, and reassemble internal transmission/transaxle components.

Drive Shaft and Half Shaft, Universal and Constant-Velocity (CV)
Joint Diagnosis and Repair

  • Diagnose constant-velocity (CV) joint noise and vibration concerns; determine needed action.

  • Diagnose universal joint noise and vibration concerns; perform needed action.

  • Inspect, remove, and/or replace bearings, hubs, and seals.

  • Inspect, service, and/or replace shafts, yokes, boots, and universal/CV joints.

  • Check shaft balance and phasing; measure shaft runout; measure and adjust driveline angles.

Drive Axle Diagnosis and Repair

Ring and Pinion Gears and Differential Case Assembly

  • Clean and inspect differential case; check for leaks; inspect housing vent.

  • Check and adjust differential case fluid level; use proper fluid type per manufacturer specification.

  • Drain and refill differential case; use proper fluid type per manufacturer specification.

  • Diagnose noise and vibration concerns; determine needed action.

  • Inspect and replace companion flange and/or pinion seal; measure companion flange runout.

  • Inspect ring gear and measure runout; determine needed action.

  • Remove, inspect, reinstall and/or drive pinion and ring gear, spacers, sleeves, and bearings.

  • Measure and adjust drive pinion depth.

  • Measure and adjust drive pinion bearing preload.

  • Measure and adjust side bearing preload and ring and pinion gear total backlash and backlash variation on a differential carrier assembly (threaded cup or shim types).

  • Check ring and pinion tooth contact patterns; perform needed action.

  • Disassemble, inspect, measure, adjust, and/or replace differential pinion gears (spiders), shaft, side gears, side bearings, thrust washers, and case.

  • Reassemble and reinstall differential case assembly; measure runout; determine needed action.

Limited Slip Differential

  • Diagnose noise, slippage, and chatter concerns; determine needed action.

  • Measure rotating torque; determine needed action.

Drive Axle Shaft

  • Inspect and replace drive axle wheel studs.

  • Remove and replace drive axle shafts.

  • Inspect and replace drive axle shaft seals, bearings, and retainers.

  • Measure drive axle flange runout and shaft end play; determine needed action.

  • Diagnose drive axle shafts, bearings, and seals for noise, vibration, and fluid leakage concerns; determine needed action.

Four-wheel Drive/All-wheel Drive Component Diagnosis and Repair

  • Inspect, adjust, and repair shifting controls (mechanical, electrical, and vacuum), bushings, mounts, levers, and brackets.

  • Inspect locking hubs; determine needed action.

  • Check for leaks at drive assembly and transfer case seals; check vents; check fluid level; use proper fluid type per manufacturer specification.

  • Identify concerns related to variations in tire circumference and/or final drive ratios.

  • Diagnose noise, vibration, and unusual steering concerns; determine needed action.

  • Diagnose, test, adjust, and/or replace electrical/electronic components of four-wheel drive/all-wheel drive systems.

  • Disassemble, service, and reassemble transfer case and components.


A Excellent 4 Grade Points Numerical grade of 90 - 100
B Above Average 3 Grade Points Numerical grade of 80 - 89
C Average 2 Grade Points Numerical grade of 70 - 79
D Below Average 1 Grade Point Numerical grade of 60 - 69
F Failed 0 Grade Point Numerical below 60
WP Withdraw Passing 0 Grade Point Issued if the course is dropped after the
census date and on or before the 60% point
of the course unless the instructor issues
a WF based on extenuating circumstances
WF Withdraw Failing 0 Grade Point Issued if the course is dropped after the
60% point of the course or the instructor
chooses based on extenuating circumstances


Regular, prompt attendance is essential for academic success. Students should strive for perfect attendance. It is recognized, however, that students may be absent from class occasionally. Students should reference the instructor's syllabus to determine the attendance requirement for this course. The instructor is responsible for enforcing the attendance requirement. It is the student's responsibility to withdraw from the course. Students may complete the withdrawal process in the Advising Center. Students may receive a grade of WP if they withdraw from a course by the 60% point/date of the course. Any student withdrawals that occur after the 60% point will result in a grade of WF. Exceptions to the "WF" grade may exist if the student has a mitigating circumstance. Students are encouraged to discuss withdrawal options with the faculty member and complete the withdrawal process in the Advising Center. Students who come in after the scheduled starting time or students who leave before the scheduled ending time will be counted as tardy. Students should reference the instructor's syllabus to determine the tardy requirement for this course. The instructor is responsible for enforcing the tardy requirement.


To preserve the best learning environment for all students, all cell phones and other electronic devices must be turned off and stored with other personal property in book bags while class is in session. Ear buds must be removed. If a student uses these devices during class, the instructor will require the student to leave because text messaging and other activities disturb the class and prevent others from concentrating on class work. If a student uses electronic devices during a test or quiz, a zero will be recorded for that assignment, and the instructor may withdraw the student from the course. The use of a phone in any way during a test or the discussion of a graded test is strictly prohibited and considered cheating.


If you have a documented disability and wish to discuss academic accommodations, please contact Frank Pait, Counselor for Students with Disabilities, at extension 4222, in the Learning Assistance Center (LAC) located on the first floor of the Cuyler A. Dunbar Building (CAD).

If you are a student with a mobility impairment and have a class in a multi-story building, please discuss evacuation plans with your instructor.


Students shall be permitted excused absences from all classes two days per academic year for religious observances required by their faith. The absences requested in accordance with this policy are "one of" and not "in addition to" any absences otherwise permitted by the faculty for a class. The excused absence request must be submitted by the second class meeting and a minimum of two (2) weeks in advance of the absence. Please contact your instructor for the required forms.


Students at CVCC are expected to be honest in all academic pursuits, whether class, lab, shop, or clinical. Acts of academic dishonesty are considered unethical and subject to behavior sanctions. Examples of academic dishonesty include, but are not limited to the following:

1. Sharing information about the content of quizzes, exams, classroom/lab/shop/clinical assignments (scheduled or make-up) without approval of the instructor including but not limited to unauthorized copying, collaboration, or use of notes, books, or other materials when preparing for or completing examinations or other academic assignments (scheduled or make-up).

2. Buying, selling, or otherwise obtaining a copy of a quiz, exams, project, term paper, or like document, without approval of the instructor.

3. Plagiarism, which is defined as the intentional representation of another person's work, words, thoughts, or ideas (from any source) as one's own.

4. Failing to follow approved test taking procedures by performing such acts as:
  • Looking on another student's test
  • Use of unauthorized notes; written, electronic, or otherwise
  • Changing answers after exam is scored
  • Verbal, non-verbal, or electronic communication with another student during an exam

Instructors have the authority to impose either a warning, probation, or dismissal from the class for acts of academic dishonesty relative to classes under their supervision.

Students have an obligation to report any acts of academic dishonesty to the instructor or appropriate campus authority when reasonable grounds exist for such a report. Students also have a responsibility to cooperate in the investigation of any alleged acts of academic dishonesty. Failure to report acts of academic dishonesty could result in a behavior sanction as outlined in the Student Conduct Policy, Policy 3.18


To Report a Serious Emergency Dial 911 from any campus phone or 911 from mobile phones; then dial 711 (Campus Safety & Security) from a campus phone.

For specific CVCC emergencies guidelines, please refer to the CVCC Emergency Guidebook


Quickly get all persons behind a locked door, close blinds, lock all windows/doors, and turn off lights. Sit against an interior wall away from windows and doors (hide). Keep cell phones ON in silent mode or vibrate. Do not leave the locked area until notified by a known CVCC administrator or by law enforcement that the emergency is over.

Seek Shelter (tornados, hurricanes, etc.)
Move to hallways and/or other inner rooms. Stay away from windows and doors. Sit on floor facing the inner wall and shield head with hands. Remain in shelter until notified by CVCC administration or by emergency personnel that the danger is over.

Building Evacuation
Leave the building immediately and proceed to a parking lot location at least 300 feet from the building. Do not delay to retrieve books or other personal items. Do not use elevators. Do not touch suspicious objects. Stay clear of the building once outside. Faculty should take class rosters if possible and account for all students at evacuation locations. Report any special assistance needed to CVCC faculty/staff or to emergency personnel. If you are aware or suspect someone is trapped in a threatened building, notify CVCC faculty/staff or emergency personnel. Remain at your building evacuation location until further instructions are provided by CVCC administration or by emergency personnel. In case of bomb threat, avoid using cell phones and wireless devices; this may detonate the bomb.

Smoke, Fire or Hazardous Materials
Activate the nearest fire alarm. Before attempting to fight a fire, notify someone nearby. Never attempt to fight a fire larger than wastebasket size. Close doors and windows to isolate the problem if the situation permits. If trapped in a building during a fire, use wet towels or cloths to protect you from flames and smoke. Stop/drop/roll if your clothes catch on fire. Do not open doors that feel hot. Always stay between the fire and an exit. Stay low to the floor as you try to exit.

Personal Emergencies
Unless you feel threatened, stay with the victim until emergency personnel arrive. Avoid contact with bodily fluids. Stay calm and try to minimize panic. If the person is conscious, ask if he/she is a High School student (if so, include this information in your 911 call).

Emergency Procedures Revised: April 4, 2012

Cell phone backup to 711 Campus Safety & Security:

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