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CAF 407.04 VEH TECH DP1 > Automatic Transmissions C27, C4 VehTech > Flashcards

Automatic Transmissions C27, C4 VehTech Flashcards

Full Study guide 2019

1
Q

What is a flex plate used for?

A

To mount the torque converter to the crank shaft. Positioned between the engine crankshaft and the torque converter (Helps the distribution of heat)

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2
Q

Identify the three main parts of a torque converter.

A

Impeller/Pump, Turbine, and Stator

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3
Q

Which part of the torque converter rotates directly with the engine?

A

Impeller

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4
Q

What is the turbine directly connected to?

A

Coupled (Splined) to the transmission turbine shaft and forms the front half of the torque converter.

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5
Q

How does the fluid flow through the turbine?

A

Fluid from the impeller and the turbine vanes and flows around the split guide.

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6
Q

Where is the stator located?

A

Between the Impeller and the turbine, which is splinded to the outer race of a one way roller clutch mounted on the stator support.

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7
Q

List the lockup clutch components.

A

Backing plate, a lockup clutch plate, lockup clutch piston, splined to the converter.

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8
Q

Identify two types of lockup torque converters.

A

Centrifugal and piston

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9
Q

What does and overrunning clutch do?

A

Keeps the stator assembly from rotating when driven in one direction and permits overrunning (Rotation).

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10
Q

Which type of vehicle do piston type lock up clutches tend to be used?

A

Heavy Duty Truck Applications

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11
Q

What is the difference Between bushing and thrust washers?

A

Bushings are cylindrical shaped usually held in by press fit. (Radial Loads)
Thrust washers control free (axial movement), Inserted between various spots

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12
Q

What do bushings have to do with transmission fluid?

A

They are used to control fluid flow, some restrict flow, while others direct flow.

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13
Q

What do Thrust washers Control?

A

Used to help control heat expansion, used for proper end play.

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14
Q

What are Torrington bearings?

A

Thrust washers fitted with roller bearings, to limit end play and reduce friction between two moving parts.

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15
Q

What is the purpose of an overrunning clutch?

A

Used to hold and drive planetary gear sets

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16
Q

What are two types of overrunning clutches?

A

Roller type and One way Spring

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17
Q

In reference to multi-disc clutches list the components contained in the Drum?

A

Cylinder, Hub, Piston, Piston return springs, Seals, Pressure plate, Steel plate, Friction plate, and snap ring.

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18
Q

What does ATF do in the automatic transmission?

A

Extremely Important, Improves durability is used as a lubricant for the transmission to remove heat.

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19
Q

What does the pressure of ATF change?

A

Changes with Engine Speed, and Load

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20
Q

What are three types of oil pumps commonly used in automatic transmissions?

A

Gear, Vane, and Rotor Types

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21
Q

Pressure regulator valves are generally what type of valve?

A

Typically Spool valves, which toggle back and fourth

22
Q

What does a kickdown circuit do?

A

Provides a downstep when the driver requires additional power. (Quick downshift)

23
Q

Name the parts in a Planetary Gear Set?

A

Sun gear (Center Gear), Planetary Pinion gears, Placed inside a ring gear having internal teeth, and a Carrier

24
Q

What are the laws of simple planetary gear operation?

A

Used to Increase or decrease torque and/or obtain neutral, low, Intermediate, high, or reverse.

25
Q

What are the two types of oil flow in a torque converter?

A

Vortex and Rotary

26
Q

Input, Output, Held =

A

Maximum Reduction

27
Q

Held, Output, Input =

A

Minimum Reduction

28
Q

Output, Input, Held =

A

Maximum Increase

29
Q

Held, Input, Output =

A

Minimum Increase

30
Q

Input, Held, Output =

A

Slow Reverse

31
Q

Output, Held, Input =

A

Fast Reverse

32
Q

When any two members are held together speed/direct the same?

A

Direct Drive

33
Q

When no member is Held, results in?

A

Neutral

34
Q

What is the purpose of venting in the automatic transmission?

A

Atmospheric pressure that forces fluid into a pump when the pump creates a low pressure in the inlet port.

35
Q

List the parts of the Valve Body?

A

Valve Body, Separator plate, Transfer plate

36
Q

How does a PRV work?

A

There is a valve and spring inside a PRV that you can set the pressure.

37
Q

In a hydraulically Controlled Transmission what is the purpose of the governor?

A

The purpose is to either determine if the gear shifts up or down depending on the road speed.

38
Q

What is the leading cause of Shift Delay?

A

For operating when there is a heavy load on the transmission the requires more torque then speed.

39
Q

What is the purpose of a kick down?

A

Forces a quick down shift to allow for more power

40
Q

List 7 components that provide input information to the TCM

A

MAP, TP, MAF, IAT, BARO, ECT, CKP

41
Q

Most common planetary gear set?

A

Simpson

42
Q

Identify all input circuit components

A

Shift selector, Throttle position sensor, Engine speed sensor, Turbine speed sensor, Output speed sensor, C3 pressure sensor, Sump Temperature sensor, Coolant sensor

43
Q

What is the purpose of the VIM?

A

Housing that provides the necessary relays, fuses, and connection points.

44
Q

How many types of solenoids are there in a WT Transmission and what are the called?

A

Two:

  1. Normally Open
  2. Normally Close
45
Q

What are primary components of a hydraulic system?

A

Transmission fluid, Charging pump, Three integral filters, electro control modules, Breather, C3 Pressure switch.

46
Q

How is a rotating clutch driven?

A

Splined to the turbine shaft, therefore rotates with turbine

47
Q

What is the purpose of the balance piston?

A

A balance piston is used to enhance control of, off-going and On- coming rotating clutches.

48
Q

How many gear options are available in the WT Transmissions?

A

Six total different options:

1,2,3,D,N,R

49
Q

Which Clutches are engaged in first?

A

C1, C5

50
Q

Which Clutches are engaged in Third?

A

C1, C3

51
Q

Which Clutches are engaged in Fourth?

A

C1, C2

52
Q

Which Clutches are engaged in Reverse?

A

C3, C5

CAF 407.04 VEH TECH DP1 (2 decks)

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