Deck 26: Zf 9hp Chrysler 948te Transmission

Question 1

The 4.7:1 gear ratio in the first gear allows the transmission to be used effectively in vehicles that have:

A) small displacement engines.
B) highly robust engines.
C) large engines.
D) biodiesel hybrid engines.

Answer 1

A

Question 2

Which gear is the transmission's 1:1 ratio?

A) Fourth
B) Fifth
C) Sixth
D) Seventh

Answer 2

B

Question 3

All of the following statements with respect to dog clutches are true except:

A) They allow the overall length of the transmission to be shorter.
B) They also reduce parasitic losses.
C) They are a friction clutch like a traditional transmission clutch.
D) They are hydraulically applied and hydraulically released.

Answer 3

C

Question 4

Choose the correct statement with respect to dog clutches.

A) They can only be engaged or disengaged when the transmission is in neutral.
B) They do not result in a delay when the transmission shifts gears.
C) The transmission can directly downshift from fifth gear to fourth gear.
D) They necessitate the start/stop function to involve an auxiliary fluid pump.

Question 5

To reduce the overall length of the transmission, the four sets of planetary gears:

A) are nested.
B) are placed one below the other.
C) overlap each other.
D) are placed on smaller carriers.

Question 6

In fail-safe mode, the transmission will default to operation is which gear only?

A) Sixth
B) Third
C) Fifth
D) Fourth

Question 7

Tech A states that in the 948TE transmission, dog clutches are used to engage all gears inside the transmission. Tech B states that dog clutches are used to save space inside the transmission. Who is correct?

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

Question 8

Tech A states that during a downshift the transmission must skip certain gears. Tech B says that the transmission will downshift two gears each time it downshifts. Who is correct?

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

Question 9

Tech A states that on the 948TE transmission a pressure transducer monitors the input clutch for proper operation. Tech B states that the pressure transducer is used to monitor the dog clutches. Who is correct?

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

Question 10

Tech A says that the 948TE transmission is start/stop capable with no additional parts. Tech B states that the transmission needs an additional electric pump to be start stop capable. Who is correct?

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

Question 11

Tech A states that the 948TE transmission will default to 5th gear in the event of a failure. Tech B states that the transmission does not have a fail-safe gear. Who is correct?

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

Question 12

Tech A states that the 948TE transmission can be shifted by cable or wire depending on the vehicle. Tech B states that shift by wire transmissions will require an additional solenoid to operate. Who is correct?

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

Question 13

The D-clutch piston can be removed from the transmission case using a(n):

A) impact gun.
B) slide hammer and hook adapter.
C) impact wrench.
D) compressor.

Question 14

A vehicle with a 9HP transmission comes in to the shop with the customer complaining about the transmission slipping. You test drive the vehicle and confirm the transmission is slipping and also has codes for 2nd, 6th, and 8th gear. Tech A states that the dog clutches could have failed. Tech B states that the c-clutch could have failed. Who is correct?

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

Question 15

A vehicle with a 9HP transmission is towed to the shop. The vehicle will not move. Tech A states that the limp home solenoid may have failed. Tech B states that the pump may have failed and locked up. Who is correct?

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

Question 16

Tech A states that the dog clutches can only be applied when power is flowing through the transmission. Tech B states that the dog clutch components must match the speed of each other before engaging. Who is correct?

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

Question 17

A vehicle with a 9HP transmission comes in to the shop. The customer complains that the vehicle drives fine around town, but when they attempt to go on the highway the vehicle will not shift and turns on the MIL. You confirm the problem and find slip codes for 4th and 5th gear. Tech A states that clutch "E" could have failed. Tech B states that clutch "B" could have failed. Who is correct?

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

Question 18

When rebuilding the input shaft, how much force should be applied to the clutch piston when measuring clutch pack clearance?

A) 75 lbs (34 kg)
B) 100 lbs (45 kg)
C) 125 lbs (57 kg)
D) 150 lbs (68 kg)

Question 19

Using a feeler gauge, check the C-clutch pack. If the clearance is not correct:

A) the clutch pack needs to be reinstalled.
B) the pressure plate will need to be changed to a different thickness.
C) reinstall the C-clutch wave washer followed by a friction. Alternate installing frictions and steels.
D) install the C-clutch pressure plate flat side up.

Question 20

When rebuilding the E-clutch assembly, clutch pack clearance is measured using a(n):

A) dial indicator.
B) feeler gauge.
C) air gun.
D) digital caliper.

Question 21

Tech A states that taking multiple pictures during disassembly of a transmission will help ease the reassembly. Tech B states that taking pictures during disassembly only delays the service. Who is correct?

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

Question 22

A 948TE transmission is to be disassembled. Tech A states that the transmission pan bolts and pan can be removed easily by pulling on them. Tech B states that the metal clip that holds the transmission pass-through connector into the transmission pan should be removed first before removing the pan bolts and the pan. Who is correct?

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

Question 23

During the disassembly of a 948TE transmission, a(n) ________ can be used to remove the transfer gear bearing from the transmission case.

A) bearing puller
B) air gun
C) impact gun
D) slide hammer

Question 24

A slide hammer along with a ________ should be used to help remove the D-clutch piston from the transmission case of a 948TE transmission.

A) hook adapter
B) Bellville spring
C) gear puller
D) pick

Question 25

Technician A says that the two halves of the 948TE transmission can be separated after removing all the bolts from the bellhousing. Technician B says that the first component removed after separating the case halves (after removing the metal gasket) is the differential. Who is correct?

A) Technician A
B) Technician B
C) Both Technicians A and B
D) Neither Technician A nor B

Question 26

Special tools are required to remove all the following components of the 948TE transmission EXCEPT which one?

A) D-clutch snap ring
B) Transfer gear bearing from the transmission case
C) C-clutch spring snap ring
D) E-clutch hub

Question 27

Technician A says that the pressure transducer switch can be unplugged at any time by removing the transmission pan. Technician B says that the pressure transducer switch can be unplugged only after removing the valve body. Who is correct?

A) Technician A
B) Technician B
C) Both Technicians A and B
D) Neither Technician A nor B

Question 28

When removing the E-clutch off the hub and shaft, a technician must be careful not to lose the __________ on the clutch.

A) Needle bearing
B) E-clutch O-ring
C) Thrust bearing
D) Snap ring

Question 29

A(n) __________ is used to aid in the removal of the D-clutch piston from the transmission case.

A) Screwdriver
B) Snap ring plier
C) Hydraulic press
D) Slide hammer and hook adapter

Question 30

Technician A says that although transmissions may appear similar, there may be differences between model years and models. Technician B says that regardless of year or model, the correct service manual should always be followed. Who is correct?

A) Technician A
B) Technician B
C) Both Technicians A and B
D) Neither Technician A nor B

Question 31

The 9HP48 transmission is the only current automatic transmission using two dog clutches.

Question 32

The 9HP48 has nine forward gears and one reverse.

Question 33

Technician A says that the 948TE transmission has four overdrive gears. Technician B says that the first gear is very low to allow the transmission to be used with low displacement vehicles. Who is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 34

Technician A says that dog clutches are being used as they take up very little space. Technician B says that dog clutches are being used as they reduce parasitic losses because there are no clutch plates to drag when the clutch is off. Who is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 35

Dog clutches are monitored by the TCM through a:

A) pressure transducer.
B) pressure switch.
C) planetary gear position switch.
D) none of the above.

Question 36

The 9HP48 transmission failsafe only allows third gear.

Question 37

Technician A says that the 948TE uses four sets of nested planetary gears. Technician B says that the 948TE transmission uses two dog clutches and three additional multidisc clutches. Who is correct?
Neither technician

A) Technician A
B) Technician B
C) Both technicians
D) Neither technicians

Question 38

The 9HP48 transmission uses a shift by wire solenoid referred to as the limp-home solenoid.

Question 39

Technician A says that the 948TE transmission uses nine or ten solenoids to operate. Technician B says that the limp-home solenoid (or the tenth solenoid) must be engaged for the transmission to operate. Who is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 40

A dog clutch is teeth cut into mating parts that as they slide together, the teeth will engage to lock the two components together.

Question 41

Tech A states that the 9HP48 transmission is the only current automatic transmission using two dog clutches. Tech B states that the 62TE transmission also uses two dog clutches. Who is correct?

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

Question 42

Identify the gear ratios of a 948TE transmission.

A) Seven forward gear ratios and one reverse gear
B) Five forward gear ratios and one reverse gear
C) Eight forward gear ratios and one reverse gear
D) Nine forward gear ratios and one reverse gear

Question 43

Identify the gear ratio of the first gear of a 948TE transmission.

A) 2.84:1
B) 1.9:1
C) 4.7:1
D) 1:1

Question 44

Identify the gear of a 948TE transmission that uses a gear ratio of 2.84:1.

A) Second gear
B) Fourth gear
C) Third gear
D) First gear

Question 45

Tech A states that the third gear of a 948TE transmission has a gear ratio of 0.8:1. Tech B states that the third gear uses a ratio of 1.9:1. Who is correct?

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

Question 46

Identify an overdrive gear of the 948TE transmission.

A) Fifth
B) Seventh
C) Second
D) Reverse

Question 47

Tech A states that the sixth and eighth gears of a 948TE transmission are overdrive gears. Tech B states that the ninth gear is an overdrive gear as well. Who is correct?

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

Question 48

Which gear of the 948TE transmission has a very high overdrive ratio of 0.47:1?

A) Sixth
B) Seventh
C) Eight
D) Ninth

Question 49

Dog clutches are applied and released ________.

A) pneumatically
B) electronically
C) hydraulically
D) mechanically

Question 50

Identify the component of a 948TE transmission shown in the given figure.

A) Dog clutch
B) Sun gear
C) Planetary gear
D) Snap ring

Question 51

Identify the component of a 948TE transmission shown in the given figure.

A) B clutch hub
B) Sun gear
C) Dog clutch A
D) Planetary gear

Question 52

Identify the component of a 948TE transmission shown in the given figure.

A) Reaction shaft
B) Dog clutch pressure transducer
C) Solenoid
D) E-clutch

Question 53

When rebuilding the input shaft, how much force should be applied to the clutch piston when measuring clutch pack clearance?

A) 75 lbs (34 kg)
B) 100 lbs (45 kg)
C) 125 lbs (57 kg)
D) 150 lbs (68 kg)

Question 54

Using a feeler gauge, check the C-clutch pack. If the clearance is not correct:

A) the clutch pack needs to be reinstalled.
B) the pressure plate will need to be changed to a different thickness.
C) reinstall the C-clutch wave washer followed by a friction. Alternate installing frictions and steels.
D) install the C-clutch pressure plate flat side up.

Question 55

When rebuilding the E-clutch assembly, clutch pack clearance is measured using a(n):

A) dial indicator.
B) feeler gauge.
C) air gun.
D) digital caliper.

Question 56

The D-clutch piston can be removed from the transmission case using a(n):

A) impact gun.
B) slide hammer and hook adapter.
C) impact wrench.
D) compressor.

Question 57

A vehicle with a 9HP transmission comes in to the shop with the customer complaining about the transmission slipping. You test drive the vehicle and confirm the transmission is slipping and also has codes for 2nd, 6th, and 8th gear. Tech A states that the dog clutches could have failed. Tech B states that the c-clutch could have failed. Who is correct?

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

Question 58

A vehicle with a 9HP transmission is towed to the shop. The vehicle will not move. Tech A states that the limp home solenoid may have failed. Tech B states that the pump may have failed and locked up. Who is correct?

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

Question 59

Tech A states that the dog clutches can only be applied when power is flowing through the transmission. Tech B states that the dog clutch components must match the speed of each other before engaging. Who is correct?

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

Question 60

A vehicle with a 9HP transmission comes in to the shop. The customer complains that the vehicle drives fine around town, but when they attempt to go on the highway the vehicle will not shift and turns on the MIL. You confirm the problem and find slip codes for 4th and 5th gear. Tech A states that clutch "E" could have failed. Tech B states that clutch "B" could have failed. Who is correct?

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

Question 61

Technician A says that the 948TE transmission has four overdrive gears. Technician B says that the first gear is very low to allow the transmission to be used with low displacement vehicles. Who is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 62

Technician A says that dog clutches are being used as they take up very little space. Technician B says that dog clutches are being used as they reduce parasitic losses because there are no clutch plates to drag when the clutch is off. Who is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 63

Dog clutches are monitored by the TCM through a:

A) pressure transducer.
B) pressure switch.
C) planetary gear position switch.
D) none of the above.

Question 64

Technician A says that the 948TE transmission uses nine or ten solenoids to operate. Technician B says that the limp-home solenoid (or the tenth solenoid) must be engaged for the transmission to operate. Who is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 65

The 4.7:1 gear ratio in the first gear allows the transmission to be used effectively in vehicles that have:

A) small displacement engines.
B) highly robust engines.
C) large engines.
D) biodiesel hybrid engines.

Question 66

Which gear is the transmission's 1:1 ratio?

A) Fourth
B) Fifth
C) Sixth
D) Seventh

Question 67

All of the following statements with respect to dog clutches are true except:

A) They allow the overall length of the transmission to be shorter.
B) They also reduce parasitic losses.
C) They are a friction clutch like a traditional transmission clutch.
D) They are hydraulically applied and hydraulically released.

Question 68

Choose the correct statement with respect to dog clutches.

A) They can only be engaged or disengaged when the transmission is in neutral.
B) They do not result in a delay when the transmission shifts gears.
C) The transmission can directly downshift from fifth gear to fourth gear.
D) They necessitate the start/stop function to involve an auxiliary fluid pump.

Question 69

To reduce the overall length of the transmission, the four sets of planetary gears:

A) are nested.
B) are placed one below the other.
C) overlap each other.
D) are placed on smaller carriers.

Question 70

In fail-safe mode, the transmission will default to operation is which gear only?

A) Sixth
B) Third
C) Fifth
D) Fourth

Question 71

Tech A states that in the 948TE transmission, dog clutches are used to engage all gears inside the transmission. Tech B states that dog clutches are used to save space inside the transmission. Who is correct?

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

Question 72

Tech A states that taking multiple pictures during disassembly of a transmission will help ease the reassembly. Tech B states that taking pictures during disassembly only delays the service. Who is correct?

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

Question 73

A 948TE transmission is to be disassembled. Tech A states that the transmission pan bolts and pan can be removed easily by pulling on them. Tech B states that the metal clip that holds the transmission pass-through connector into the transmission pan should be removed first before removing the pan bolts and the pan. Who is correct?

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

Question 74

Tech A states that during a downshift the transmission must skip certain gears. Tech B says that the transmission will downshift two gears each time it downshifts. Who is correct?

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

Question 75

Tech A states that on the 948TE transmission a pressure transducer monitors the input clutch for proper operation. Tech B states that the pressure transducer is used to monitor the dog clutches. Who is correct?

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

Question 76

During the disassembly of a 948TE transmission, a(n) ________ can be used to remove the transfer gear bearing from the transmission case.

A) bearing puller
B) air gun
C) impact gun
D) slide hammer

Question 77

A slide hammer along with a ________ should be used to help remove the D-clutch piston from the transmission case of a 948TE transmission.

A) hook adapter
B) Bellville spring
C) gear puller
D) pick

Question 78

Tech A says that the 948TE transmission is start/stop capable with no additional parts. Tech B states that the transmission needs an additional electric pump to be start stop capable. Who is correct?

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

Question 79

Tech A states that the 948TE transmission will default to 5th gear in the event of a failure. Tech B states that the transmission does not have a fail-safe gear. Who is correct?

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

Question 80

Technician A says that the two halves of the 948TE transmission can be separated after removing all the bolts from the bellhousing. Technician B says that the first component removed after separating the case halves (after removing the metal gasket) is the differential. Who is correct?

A) Technician A
B) Technician B
C) Both Technicians A and B
D) Neither Technician A nor B