Question 1

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

Accepted Answer

A 4.7:1 gear ratio in the first gear is typically used to provide more torque, which is beneficial for vehicles with small displacement engines that need assistance in generating sufficient power for acceleration.

Question 2

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

Accepted Answer

B

Question 3

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

Accepted Answer

Dog clutches are not friction clutches like a traditional transmission clutch.

Question 4

Choose the correct statement with respect to dog clutches.

Accepted Answer

They can only be engaged or disengaged when the transmission is in neutral.

Question 5

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

Accepted Answer

Nesting the planetary gears allows them to be compactly arranged, reducing the overall length of the transmission.

Question 6

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

Accepted Answer

In fail-safe mode, the transmission will default to operation in fourth gear only. This is because fourth gear is the most efficient gear for most driving conditions, and it provides the best balance of fuel economy and performance.

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?

Accepted Answer

The answer of Tech A states that in the 948TE...

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?

Accepted Answer

Tech A is correct because during a downshift, the transmission must skip certain gears to avoid over-revving the engine.

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?

Accepted Answer

The answer of Tech A states that on the 948TE...

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?

Accepted Answer

The 948TE transmission is start/stop capable with no additional parts.

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?

Accepted Answer

The answer of Tech A states that the 948TE transmission...

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?

Accepted Answer

Both Tech A and Tech B are correct. The 948TE transmission can be shifted by cable or wire depending on the vehicle, and shift by wire transmissions will require an additional solenoid to operate.

Question 13

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

Accepted Answer

A slide hammer and hook adapter are typically used to remove components like the D-clutch piston from a transmission case by providing the necessary pulling force.

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?

Accepted Answer

The answer of A vehicle with a 9HP transmission comes...

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?

Accepted Answer

Both Tech A and Tech B could be correct. A failed limp home solenoid can prevent the vehicle from moving by not allowing the transmission to engage properly. Similarly, if the pump has failed and locked up, it can also prevent the vehicle from moving by not circulating transmission fluid, which is necessary for the transmission to function.

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?

Accepted Answer

Tech B is correct because dog clutches require the components to be at matching speeds to engage smoothly without causing damage. Tech A is incorrect as dog clutches can be engaged without power flowing through the transmission.

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?

Accepted Answer

Clutch "E" is responsible for engaging higher gears like 4th and 5th in a 9HP transmission, so its failure could cause the slipping issue in those gears.

Question 18

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

Accepted Answer

The answer of When rebuilding the input shaft, how much...

Question 19

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

Accepted Answer

If the clearance is not correct, the pressure plate may need to be changed to a different thickness to achieve the correct clearance.

Question 20

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

Accepted Answer

A dial indicator is used to measure clutch pack clearance because it provides a precise and accurate measurement.

Quiz 26: Zf 9hp Chrysler 948te Transmission