190303b

Question 1

Identify the two major functions of a torque converter

Answer 1

A) torque multiplication

B) Fluid Coupling (engagement device)

Question 2

Identify 2 torque converter features that help protect the driveline and or Transmission

Answer 2

A) shock absorption during engagement reduces powertrain stresses

B) gradual start up for load reduces stresses on The driveline and or Transmission

Question 3

Identify the two types of oil flow And the conditions under which each occurs

Answer 3

A) vortex flow occurs when difference in the impeller and turbine speed is greatest

B) Rotary flow occurs When the difference in impeller and turbine speed is slight (direct Drive)

Question 4

Vortex flow is the greatest when:

Answer 4

Torque output is the greatest

Question 5

Rotary flow in a hydrodynamic drive is

Answer 5

Greatest when torque output is the lowest

Question 6

Identify the 3 main torque converter elements

Answer 6

A) impeller or Pump (Drive unit)

B) stator

C) turbine ( driven unit )

Question 7

The purpose of the stator is to:

Answer 7

Change direction of oil flow

Question 8

The part is connected to the transmission input shaft is the ?

Answer 8

Turbine

Question 9

Is a lockup clutch engaged at low engine RPM to prevent torque converter slippage during those periods when high torque output is required? T/F

Answer 9

False

Question 10

The purpose of a torque converter lockup clutch is

Answer 10

To increase efficiency

Question 11

The clutch disc of a torque converter lockup clutch is connected to

Answer 11

The impeller and turbine

Question 12

The term phase refers to

Answer 12

3 phases of a torque converter
converter
coupling
lockup

Question 13

Maximum torque converter output torque occurs when

Answer 13

The turbine is stopped and the impeller is turning at maximum possible rpm

Question 14

The stator is a

Answer 14

Stationary reactor

Question 15

Converter temperature sending units are usually located in

Answer 15

The converter oil output

Question 16

The highest torque output is produced in the variable vane stator when the vanes are in what position?

Answer 16

The open position

Question 17

When the torque demand is low what position are the vanes of a variable vane stator in?

Answer 17

Vanes are in the “closed” position

Question 18

List the features of the transmission reservoir

Answer 18

Stores oil
Cools oil
Settles out contamination
De-aerates

Question 19

Outlet torque converter oil always goes where?

Answer 19

To the cooler

Question 20

The hottest oil in the powertrain circuit is where?

Answer 20

Torque converter outlet

Question 21

What does the torque converter pressure regulating valve do?

Answer 21

Ensures torque is full of oil
Maintains working pressure within the torque converter
Prevents cavitation and aeration

Question 22

What did early torque converters use as a fluid?

Answer 22

Diesel fuel

Question 23

Powertrain oils lubricating properties are affected at which temperature?

Answer 23

121C 250F

Breakdown temp

Question 24

If a PTO or any type of drive gears are used what type of housing will you have?

Answer 24

Wet housing

Question 25

Which type of housing is usually used on industrial applications when PTO gears are mounted in the converter housing?

Answer 25

Wet housing

Question 26

What are five things you can check the torque converter for when it’s removed

Answer 26

Missing balance weights, cracks, broken welds, broken drive lugs, score marks and a pressure test

Question 27

When pressurizing a torque converter to check for leaks what’s the rule of thumb regarding pressure to test with

Answer 27

Apply 50% more then operating pressure. Example. 50 PSI is operating +50% equals 75 PSI

Question 28

When cleaning components of a torque converter what is a major precaution

Answer 28

That aluminum components will not be damaged by the cleaning solution

Question 29

What is a critical step when assembling a torque converter for install

Answer 29

Pre-lubrication during assembly stage is critical to ease proper assembly and provide adequate lubrication at start up

Question 30

If shift linkages have been removed, what must be done after install?

Answer 30

Ensure proper adjustment if required so the detents at the transmission shift control are in the proper detent when the shift control is in neutral or any selected position

Question 31

When is a gravity drain used?

Answer 31

When the torque converter housing is located above the transmission

Question 32

What are the three functions of a torque divider?

Answer 32

Provides automatic clutching, multiplies torque and absorbs power train shock loads

Question 33

Which planetary gear set component is the impeller splined to in a torque divider?

Answer 33

The sun gear

Question 34

Which component is the internal gear splined to in a torque divider?

Answer 34

The turbine

Question 35

Which component is the output shaft splined to in a torque divider?

Answer 35

The carrier/planetary

Question 36

In a torque divider, oil flow for torque converter operation and component lubrication comes from where?

Answer 36

An engine driven charging pump

Question 37

What type of converter housing does a torque divider have?

Answer 37

Wet type with scavenge

Question 38

Torque converters may be installed in the power train in what two locations?

Answer 38

• Engine mounted, sometimes called integral design

- Remote mounted

Question 39

What is a critical concern in a remote mounted torque converter application?

Answer 39

Proper driveline alignment

Question 40

A torque divider must be pressure lubed.. why

Answer 40

It is above its oil level. it does not sit in oil. scavenge oil out