Deck 74: Automatic Transmission Diagnosis and Service

Question 1

A typical automatic transmission repair business employs a remove and replace (R&R) specialist and a rebuilder.

Answer 1

True

Question 2

The fluid pressure in the transmission cooler lines usually ranges from 65 to 85 psi.

Answer 2

False

Question 3

____ usually means that coolant has mixed with the fluid because of a leak in the radiator transmission cooler.

A)Varnish
B)Milky fluid
C)ATF fluid
D)Burned fluid

Answer 3

B

Question 4

During a(n) ____________________, the engine rpm will increase in speed briefly until the clutch pack or servo piston finally seals and pressure builds, fully applying the clutch.

Question 5

On an unmodified engine, intake manifold vacuum above 15" can indicate a mechanical problem.

Question 6

While having a discussion, Technician A says that when the vehicle will not move in forward or reverse ranges, the cause could be no hydraulic pressure. Technician B says that it could be a mechanical problem. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 7

A(n) ____________________ will tell if the transmission is experiencing internal leakage, has a problem with a vacuum modulator, or requires adjustment to linkages.

Question 8

A(n) ____________________ occurs when the transmission makes a gear change too quickly.

Question 9

The test MOST-Likely used to check the operation of various clutch packs and servos before disassembling a transmission fully is:

A)flow test
B)pressure test
C)stall test
D)air test

Question 10

Most transmission service is preventive maintenance, rather than correction of a problem.

Question 11

The condition that will MOST-Likely cause hydraulic binding when foreign oil enters the wrong circuit is:

A)cross leak
B)defective pump
C)flexplate failure
D)transmission noise

Question 12

All of the following statements are true EXCEPT:

A)the torque converter contains about 7 to 9 quarts of fluid.
B)cold fluid will expand by about 1 pint when heated to operating temperature.
C)if air gets into the torque converter, it will not be mixed with the fluid but will gather around the input shaft.
D)overtightening a gasket will take it past its elastic limit and cause it to lose its sealing ability.

Question 13

A(n) ____________________ is used to determine if a transmission is slipping or a torque converter is defective.

Question 14

Transmissions are designed to go into a(n) "____________________" mode if the computer detects a failure.

Question 15

Anything that causes heat is severe service.

Question 16

Which of the following statements is LEAST-Likely true?

A)Computers in North American vehicles use power side switching with current limiting devices.
B)Today's transmissions ground their switches through the computer in response to various inputs.
C)Transmission failures are sometimes caused by someone adding trailer brakes.
D)Speed sensors can be Hall-effect sensors or permanent magnet sensors, that can be tested with a digital multimeter using its alternating current (AC) voltage scale.

Question 17

While having a discussion, Technician A says that you should use moly assembly lube on a one-way clutch. Technician B says that it should not be used on a one-way clutch because it will cause morning sickness. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 18

Which of the following is LEAST-Likely a cause of slippage?

A)A problem with the valve body
B)High fluid level
C)Leakage in a clutch pack or servo
D)A plugged pump inlet screen or filter

Question 19

Until the recent past, ____ fluid was the most popular generic fluid for electronic transmissions.

A)Hotchkiss
B)ATF
C)Dex/Merc
D)SAE 10

Question 20

All of the following statements are true EXCEPT:

A)shifts can be either too late, with the engine rpm too high, or too early, with the engine lugging.
B)a transmission that shifts at the wrong time could be the result of a pressure problem or a sticking valve in the valve body.
C)pressure problems can be caused by a leaking modulator, a misadjusted throttle valve cable, or a sticking governor.
D)clutch chatter can be caused by a leaking modulator, a misadjusted throttle valve cable, or a sticking governor.

Question 21

How would you check a neutral safety switch to see if it is bad?

Question 22

How would you replace a front transmission seal while the engine and transmission are separated?

Question 23

How would you check for aeration from the torque converter?

Question 24

How would you remove excess fluid from the transmission?

Question 25

How would you perform a stall test?