AUT233 Automatic Transmission II

Course Number=	AUT233	Credi= t Hours	3
Instructor	Darrell Hanan
E-mai= l	dhanan@e= icc.edu	Phone	563-441-= 4228
Offic= e Hours	3:00pm-4= :00pm	Office	3116BB
Room	3119	Website	http://faculty.eicc.edu/dhanan

Click here to go links to= Lesson Notes

Text

Automatic Transmissions= and Transaxles, – Birch and Rockwood

Automatic Transmisions II Student Activity Manual, Hanan

Course Description

This= course is designed to provide advanced knowledge in the diagnosis and repair of automatic transmissions and transaxles. The student will develop skills in reading transmission hydraulic control circuit schematics. The student will develop the skills necessary to perform diagnosis of electronically control= led automatic transmissions and transaxles. The student will dis-assemble and re-assemble an automatic overdrive transaxle. The use of pressure gauges, s= can tools and other test equipment will be practiced.

Major Topics Covered

Knowledge of transmission hydraulic circuits

Knowledge of sensor inputs

Knowledge of control outputs

Knowledge of TCM functions

Use of ser= vice information and troubleshooting procedures

Prerequisites

AT131

Attendance/Participation

See Below

Evaluation

Final grade will be based on six areas:

Final Test......................................10%

Quiz scores..................................25%

Case Studies………………………̷= 0;….………10%

Lab work........................................30%

Employee Characteristics…………….15%

Lab Log...........................................10%

Final Grading Scale:

A > 90 - 100%

B > 80 - 89%

C > 70 - 79%

D > 60 - 69%

F > 59% or below

No unit tests will be given in this course.

QUIZZES: A quiz may be given every other day. A missed quiz cannot be made up. Each student may be required to write 5 quiz questions as part of their quiz sco= re. These are due before the quiz and will not be accepted late. The lowest quiz score will be dropped.

LAB WORK: = Work performance will be evaluated based on lab worksheets. Worksheets will be collected weekly as the work is completed. All worksheets must be turned in= as required. Worksheets MUST be initialed by the instructor as they are completed or they will not be accepted!

CASE STUDIES: Small groups will be assigned transmission diagnostic case studies. The group will be required to work together to answer questions concerning = the case study. The group will earn a grade for the case study assignment. The grade earned will be based on the thoroughness of the group’s answers= to the questions. The grade each individual receives for the case study will be based on that individualR= 17;s participation in the process and the grade earned by the group for the case= study.

The individual grade will be earned based on a peer assessment. Each member of = the group will rate the other members as to the level of effort in participatio= n on a scale of 1 to 10. The instructor will average the rating for each student. The average will be divided by 10 to determine the Participation Factor. (T= he instructor reserves the right to adjust the average the rating as he deems fit.) The group case study grade will then be multiplied by the Participati= on Factor to determine the individual’s case study grade.

Examples: Group grade » 85 out of 100

&= nbsp; Indi= vidual Rating Average » 8.2 ÷ 10 =3D .82 Participation Factor

&= nbsp; 85 X .82 = =3D 69.7 Case Study grade

Group grade &raq= uo; 95 out of 100

&= nbsp; Individual Rating Average » 9.5 ÷ 10 =3D .95 Participation Factor

&= nbsp; 95 X .95 =3D 90.2 Case= Study grade

LAB LOGS: A weekly lab log will be kept by each student. The student will record his/her lab activity for each day. The weekly lab grade will be determined = from the student’s log. Any lab sheets will be turned in with the log. The= log must be turned in every Monday. A log not turned in will resu= lt in a zero for the weekly lab grade.

The log entry must include the following: Name, Day & Date, Description of the lab acti= vity (minimum of five sentences), Five things learned that Week, Difficulties experienced that = week and Description of the best part of the week.<= /p>

EMPLOYEE CHARACTERISTICS: Students will receive= a weekly grade based on their demonstration of basic employee characteristics expected by employers. These include Dependability, Punctuality, Productivi= ty, Teamwork, Communication, Safety, and Cleanup. The instructor will rate each characteristic weekly on the following scale:

0 – Unacceptable, does not meet minimum requirements

= 2 - Consistently meets minimum requirements

= 3 - Occasionally exceeds minimum requirements

= 4 - Consistently exceeds minimum requirements

FINAL TEST: All students are expected to take the final test. Failing to do so wi= ll adversely affect your final grade.

Exam Make-up policy
See Above

Late Assignment Policy

See Above

Assessment

See Above

Cell phone policy

See Below

The following are non-negotiable expectations of classroom and lab conduct.

Class members will attend class = on time. The instructor reserves the right to refuse admittance to anyone= who arrives late for class! (Ten minutes grace for students and instructor= on rare occasions.)
Class members will refrain from negative comments about others in the class.
Class members will refrain from disrupting the learning of others by theirs words and behavior.
Class members will adhere to all safety policies.
Cell phones will not ring or be = used for conversation during classroom or lab sessions.
Class members will refrain from = using tobacco products during classroom or lab sessions.
Class members will refrain from sleeping in class. Sleep at home, be alert in class!=
Class members will endeavor to c= onduct themselves in a professional manner.

POLICIES ON ACADEMIC DISHONESTY CAN BE FOUND IN THE EICCD STUDENT CO= DE OF CONDUCT PUBLISHED IN THE STUDENT HANDBOOK.

Benefits of taking this class

Students w= ho successfully complete this course will have increased their understanding of how automatic transmissions and their computer control systems function. Th= ey will also learn how to test the components of the electronic system.

= ;

Study Tips

To be succ= essful students must complete the assignments given them. Working in small groups = of two will increase the learning in the lab.

= ;

Academic Accommodation

Anyone who= feels they may need an academic accommodation based on the impact of a documented disability should contact Jan Weis at the Belmont campus 441-4027 to arrange an appointment as soon as possible. At the appointment, course format, individual needs, and potential accommodations = will be discussed. This service is FREE and confidential

= ;

Class Cancellation

Students m= ay go to the web site at http://www.eicc.ed= u/students to check if class has been cancell= ed. Once there, click on academics and again on class cancellations. You may al= so call the college at 563-441-4001.

= ;

Course Schedule

Automatic Transmission II

Approximate Lesson Sequence

Reading Assignment Topics

= &nb= sp; Topic &n= bsp; = ; &n= bsp; = ; &n= bsp; Chapter

1 Intro and Review &= nbsp; &nbs= p; &= nbsp; &nbs= p; 3, 4, 5, 6, 7 & 9

2 Inspection and Overhaul Procedures &= nbsp; &nbs= p; 16, 17 & 18

3 Electronic Co= ntrol Devices &= nbsp; &nbs= p; &= nbsp; &= nbsp; 8 & 13

4 Sensor and Actuator Testing &= nbsp; &nbs= p; 13

5 Hydraulic Circuits &= nbsp; &nbs= p; &= nbsp; &nbs= p; GM 4T65-E Handouts

6 Torque Converter Testing and &= nbsp; &nbs= p; 12.6, 12.7, 12.9 & 13.6.2

Transmission Pressure Testing

7 Case Studies

8 Case Studies

Back to Top=

Course Competencies/Outcomes for Automatic Transmission II=

Upon the completion of this course, the students wil= l be able to:

1. Identify and interpret transmission/transaxle concern; assure prop= er engine operation; determine

necessary action. &nbs= p; P-1

2. Diagnose fluid loss and condition concerns; check fluid level on transmissions with and without dip-

stick; determine necessary action. P-1

3. Perform pressure tests; determine necessary action. &= nbsp; P-1

4. Perform stall test; determine necessary action. P-3

5. Perform lock-up converter system tests; determine necessary action= . = P-3

6. Diagnose mechanical and vacuum control system concerns; determine necessary action. P-2

7. Diagnose noise and vibration concerns; determine necessary action.= = P-2

8. Diagnose electrical/electronical conce= rns using principles of electricity (Ohm’s Law). P-2

9. Diagnose electronic transmission control systems using a scan tool; determine necessary action. &nb= sp; P-1

10. Measure torque converter endplay and check for interference; check stator clutch. &nbs= p; P-2

11. Inspect transaxle drive, link chains, sprockets, gears, bearings,= and bushings; perform necessary

action. &n= bsp; P-2

12. Inspect, measure, repair, adjust or replace transaxle final drive components. &= nbsp; P-2

Note: P-1, P-2, & P-3 indi= cate the NATEF task priority level.

= &nb= sp; = &nb= sp;

AUTOMATIC TRANSMISSIONS II

Lesson 1

Transmission Component Inspection

- Before teardown

-Input shaft end-play

-indicates need for thrust washer or shim change

- During Teardown

- Oil pump & Torque Converter

- bushing for = torque converter

- stator suppo= rt

- pumping components slide clearance=

- scoring

- Governor

- drive gear

- “apple coring”

- springs

- valve

- Drive Chain and Sprockets

- deflection or stretch

- wear

- bearings and bushings

- Drums and bands

- clutch pistons

- return sprin= gs

- check balls

- scoring

- deglaze with = 600 grit crocus cloth,

smooth on a lathe

- friction mat= erial

- sealing ring areas

- struts and a= nchors

- Thrust washers, bushings and bearings

- wear and scoring

- thickness

- Planetary members

- Pinion gear wear

- Pinion end-pl= ay

- replaceable thrust washers

- Pinion gear bearing smoothness

- Spline fit<= o:p>

- Ring and sun gear wear

- bushings and thrust washers

- Shafts

- splines=

- bearing surfaces

- sealing ring lands, 0.003" clearan= ce

- end bushings

- Servos and Accumulators

- piston<= /o:p>

- pin

&nb= sp; = - length of servo pin, if selective fit=

- springs<= /o:p>

- Case

- Accumulator and servo bores<= /span>

- Bushings

- Warpage across valve body surface, 0.002" max.

Bolt in center support if applicable=

- thread condition

- splines

Valve body

- sticking or scored valves, <= /span>

- broken sprin= gs

- warpage=

- separator pl= ate damage

- Over-running Clutches=

- rollers or <= span class=3DSpellE>sprags

- races

- springs

- rotation dir= ection

During Reassembly

- Clutch pack clearance: min. 0.010" per friction disc=

- Air check clutches

- Servo pin length

- Band adjustment

- End-play of input shaft

Back to Lesson Topics=

Automatic Transmissions II

Lesson 2

Electronic Transmission Control Devices

What automatic transmission functions maybe controll= ed electronically?

Shift timing, shift quality, line pressur= e, TCC

TCM/PCM Input= s

The TCM uses a variety of inputs to deter= mine the actions necessary to maintain proper transmission operation.=

· = Torque load –

o Throttle position or manifold vacu= um input

§ Throttle position sensor

§ Manifold absolute pressure sensor

o Replaces throttle valve or modulat= or

· = Vehicle speed –

o Vehicle speed sensor

o Output shaft speed sensor

o Replaces governor

· = Manual valve position –

o Transmission range sensor

o May be a potentiometer or a set of pressure switches on the valve body

· = Transmission temperature –

o Transmission fluid temp. sensor

· = Input shaft speed –

o Input shaft or turbine speed sensor – ISS or TSS sensor

· = Impeller speed –

o Crankshaft position sensor

The TCM uses the TSS and CKP to determine= the torque converter slip ratio.

The TCM uses the TSS and OSS to determine the current gear ratio= and if the transmission is slipping.

· = Brake application –

o Brake light switch input

· = Engine temperature –

o Engine coolant temperature sensor<= o:p>

The TCM uses the TPS, VSS, brake light sw= itch input and ECT to determine when to lock and unlock the torque converter.

TCM/PCM outpu= ts

The TCM uses a few electromagnetic actuat= ors to affect hydraulic pressures in the transmission and provide optimum transmission function.

Transmission Solenoid Control<= /span>

Two methods are used to control transmiss= ion solenoids:

· = Saturation- the TCM driver is ON or OFF. The solenoid resistance limits the current. (Solenoid resistance > 10 ohms)=

· = Pulse Width Modulated- The TCM controls the current level by pulsing the solenoid= ON and OFF rapidly. The ON time varies to vary the current. (Solenoid resistance < 10 ohms)=

Solenoid Functions

· = Shift solenoid –

o Controls fluid flow to an apply de= vice directly

§ This type may be pulsed initially to control the quality of the shift=

OR
o   Controls fluid pressure on a shift valve

§ This type is usually “On” or “Off”, not pulsed

·      = TCC solenoid –

o   Controls fluid pressure at one end= of the TCC apply valve which locks and unlocks the torque converter=

·      = TCC modulation solenoid –

o   A pulsed solenoid that is used to gradually “ramp up” the TCC apply pressure

o   Controls the converter clutch regulator valve

o   Sometimes referred to as the PWM solenoid

·      = Electronic Pressure Control (EPC) Solenoid or Force Motor

o   The EPC is used to control the main line pressure

§ The EPC creates and varies a torque signal pressure based on the torque load

§ The torque signal pressure acts on the main pressure regulator valve to control= the line pressure (similar to T.V. or modulator pressure)

o   The average current through the EP= C is varied by the TCM using pulse width modulation

§ A low average current results in a higher torque signal pressure and higher l= ine pressure

§ A high average current results in a lower torque signal pressure and lower li= ne pressure

o   Some EPC are pulsed fully every 10 seconds to prevent contamination by small metal particles

·      = Governor Pressure

o   The TCM uses vehicle speed input to control the governor pressure solenoid and create governor pressure. The TCM controls shift points using the governor pressure solenoid.

o   The TCM will lock up the TCC to co= ol the transmission if it is overheating

TCM Strategie= s

· = Reduced engine torque during shifts

o The PCM retards spark timing and/or reduces fuel delivery during the shift

o Shift quality is improved and transmission wear is decreased

· = Regulate transmission temperature with torque converter clutch

o The PCM will wait longer to lock up the TCC when the unit is cold to lessen the time required to reach operating temperature

· = Limp-In

o Occurs when power is lost to the T= CM or transmission and when a major electrical or mechanical problem has been detected

o All solenoids are de-energized

o No up shifts or down shifts

o The transmission is stuck in 2nd or 3^rd gear

o Reverse is still available

· = Adaptive Learn

o The TCM learns that a particular s= hift is slipping or a slip is occurring after a shift

· = GM – Shift and Steady State Adapts

· = Chrysler FWD – Clutch Volume Index (CVI)

o It attempts to correct the problem= by increasing line pressure during the shift

· = Most electronically shifted transmissions must have their adaptive learn reset a= fter a major repair. Reset or relearn procedures vary depending on the transmiss= ion model. Always refer to the proper service information.

Some TCM’s lear= n and adapt to a driver’s style (fuzzy logic).