Automatic Transmission Midterm Exam CH 1, 3, 6
An automatic transmission or transaxle receives engine power through what part?
A torque converter
Technician A says by multiplying the number of teeth on one gear by the number of teeth on a second gear, a gear ratio can be determined. Technician B says the mathematical relationship, according to the number of teeth, of one gear to another is expressed in a gear ratio. Who is correct?
B Only
Technician A says that in a RWD vehicle, the transmission and drive axle are located in a single assembly. Technician B says a transaxle is a single assembly containing the transmission and drive axle. Who is correct?
B Only
Technician A says all automatic transmissions use a torque converter to transfer power from the engine to the transmission. Technician B says some automatic transmissions use a torque converter to transfer power from the engine to the transmission. Who is correct?
B only
Technician A says during the operation of the stator, only a portion of the fluid returning from the turbine to the impeller passes through the stator. Technician B says when the stator is in operation, it redirects the fluid leaving the turbine back to the impeller. Who is correct
B only
Technician A says hydraulic problems, not linkage problems, cause delayed or missed shifts. Technician B says any engine movement can change the effective length of the shift and throttle cables can affect the engagement of gears. Who is correct?
B only
Technician A says that a dual-stage positive displacement oil pump, such as the design used by some Chrysler transmissions, allows the pump to deliver the pressure and fluid flow of a large displacement pump at high engine speeds. Technician B says that the dual state pump delivers the pressure and fluid flow of a large displacement pump at lower engine speeds. who is correct?
B only
Technician A says the impeller is driven by the force of the fluid from the turbine and is splinted to the input shaft. Technician B says the torque converter's impeller is driven by the converter cover, and its rear hub drives the transmission's or transaxle's oil pump. Who is correct?
B only
Technician A says the manual shift valve, which is located in the valve body, moves indirectly to the movement of the throttle pedal. Technician B says the manual shift valve in the transmission is moved by the gear selector lever and linkage. Who is correct?
B only
Technician A says the torque converter's stator indirectly drives the oil pump. Technician B says any engine movement can change the effective length of the shift and throttle cables and can affect the engagement of gears. Who is correct?
B only
Technician A says when there is a delay or slip as the transmission shifts into any forward gear, a slipping rear clutch is indicated. Technician B says a slipping front or forward clutch is indicated if the shift for all forward gears is delayed. who is correct?
B only
The stator is which member of the torque converter? a) driving b) reaction c) input d) output
B) reaction
Technician A says a drive chain is used in some transaxles to connect converter output with the transaxle input shaft. Technician B says the torque is mounted in line with the transmission's input shaft. Who is correct?
Both A and B
Technician A says a torque converter clutch plate has a spring-cushioned damper assembly in the center of the disc, and friction material on the outside of the plate. Technician B says the torque converter clutch plate is splined to the turbine shaft, and the plate locks the turbine to the converter when the piston is applied. Who is correct?
Both A and B
Technician A says a vacuum modulator controls the downshift valve in some transmissions. Technician B says the throttle linkage may control both the downshift valve and the throttle valve on some transmissions. Who is correct?
Both A and B
Technician A says delayed shifts using a TV assembly may be the result of poor engine performance. Technician B says low engine vacuum will cause a vacuum modulator to sense a load condition, causing delayed and harsh shifts. Who is correct?
Both A and B
Technician A says electrical switches are used to open and close electrical circuits. Technician B says electrical switches are used to control the operation of other devices. Who is correct?
Both A and B
Technician A says it is necessary to identify any and all non-factory installed electrical accessories when inspecting a vehicle. Technician B says non-factory installed electrical accessories may cause the system to not operate properly. Who is correct?
Both A and B
Technician A says that CVTs offer an infinite number of gear ratios. Technician B says that CVTs allow the engine to always operate at is most efficient rpm. Who is correct?
Both A and B
Technician A says that gears may be used to apply torque to other rotating parts. Technician B says that gears may be used to multiply torque. Who is right?
Both A and B
Technician A says that the late model Chrysler EMCC and the late model GM ECCC are similar in design and have similar operating characteristics. Technician B says that the 4L60-E used in the Chevrolet Silverado and the GMC Sierra Hybrids have a motor/generator placed between the engine and the transmission. Who is correct?
Both A and B
Technician A says that the metal shavings collected on permanent magnet-style speed sensors may indicate in internal transmission problem. Technician B says that if the fluid is clean and only contains a small amount of residue. the transmission problem is mostly likely caused by something external to the transmission. Who is correct?
Both A and B
Technician A says throttle pedal movement or engine vacuum is an indicator of engine load. Technician B says changes in hydraulic pressure inside the transmission or transaxle are a result of engine load changes. Who is correct?
Both A and B
Technician A says when the coupling phase of the torque converter occurs and no torque multiplication takes places, there is little vortex flow and the engine's torque is carried through the converter by rotary flow of fluid. Technician B says when the speed of the turbine nearly equals the speed of the impeller, the fluid flows against the stator vanes in the same direction as the fluid impeller. Who is correct?
Both A and B
Which of the following is true of an impeller a) it allows for torque multiplication b) it is splinted to the input shaft c) it is driven by the converter cover d) it supplies pressures to be used within the valve body
C) it is driven by the converter cover
Which of the following types of pump is not used in transmissions or transaxles. a) Vane-type b) rotor-type c) gear-type d) screw-type
D) screw-type
Which of the following does not sense engine vacuum? a) manifold absolute pressor sensor b) throttle position sensor c) pressure regulator valve d) modulator valve e) B or C
E) B or C
Technician A says a one-way clutch in the stator allows it to remain stationary when it is not needed. Technician B says the flow of fluid from the impeller to the turbine is directed with the aid of the stator. Who is correct?
Neither A nor B
Technician A says identification numbers identify only the manufacturer and assembly date of the transmission of transaxle. Technician B says the shape of the oil pan is the only positive way to identify the exact design of the transmission or transaxle. Who is correct?
Neither A nor B
Technician A says two-element fluid couplings had higher impeller speeds and they are no longer used because they caused the engine to stall while in gear at idle. Technician B says engagement of two-element fluid couplings when sudden and jerky and they are no longer used for this reason. Who is correct?
Neither A nor B
Technician A sayss that the late-model Hondas and Acuras use a four-speed transmission. Technician B says that in late-model Hondas and Acuras partial lock-up of the converter clutch is not allowed. Who is correct?
Neither A nor B
Technician B says installing a thrust washer between the oil pump and the direct or front clutch will correct torque converter end play. Technician B says the torque converter must be installed in the transmission before checking end play. Who is correct?
Neither A nor B
Technician A says the application of hydraulic pressure on the clutch will cause nearly all converter clutches to engage. Technician B says electrical malfunctions always result in torque converter clutch in control problems. Who is correct?
A Only
Technician A says a torque converter transfers engine power to the transmission, operating by a hydraulic force. Technician B says a torque converter divides torque evenly. Who is right?
A only
Technician A says leaking hydraulic circuits or sticking spool valves in the valve body can result in delayed shifts or slippage. Technician B says worn planetary gear set members can cause delayed shifting. Who is correct?
A only
Technician A says planetary gears provide different gear ratios needed to move the vehicle. Technician B says automatic transmissions and transaxles must have at least three planetary gear sets. Who is correct?
A only
Technician A says that any electronic problems, as indicated by fault codes retrieved by a scan tool, should be corrected before continuing with the diagnosis. Technician B says that the electronic problems will be corrected when the transmission repair is complete. Who is correct?
A only
Technician A says that some newer transmission designs incorporate as many as eight forward speeds. Technician B says the main reason for an overdrive gear is to increase vehicle performance. Who is correct?
A only
Technician A says the flexplate must be flexible enough to allow the front of the convert to move forward and backward if it expands or contracts due to heat or pressure. Technician B says the torque converter's rear hub is bolted to the flexplate. Who is correct?
A only
Technician A says the valve body senses and responds to engine and vehicle load. Technician B says valve bodies house many different valves that are moved by the gear selector. Who is correct?
A only
Technician A says two discs and wheels are used in place of the belt and pulleys in a toroidal CVT system. Technician B says one disc connects to the engine and the other disc is the input in the toroidal system. Who is correct?
A only
What device is used to transfer engine torque to an automatic transmission?
Torque Converter
Which of the following is not true of a torque converter? a) it multiplies torque b) it is a fluid coupling c) it allows some slippage d) all are correct
d) all are correct
By applying the engine's torque to one of the gears in a planetary gear set and preventing another member from moving, which of the following changes can take place? a) torque multiplication b) speed increase c) change in direction d) all of the above
d) all of the above
Which of the following is true of the VIN? a) it will be found on a sticker b) it will have barcoded information c) it will include build date, part number, and exact model. d) all of the above e) none of the above
d) all of the above
From a single planetary gear set there are two possible reverse speeds and how many possible forwards speeds? a) Four b) Three c) One d) Five
d) five
Which of the following is the true of an overdrive gear? a) it occurs when speeds decrease to 30 mph b) it is used when climbing hills c) it provides release of the converter lock-up clutch. d) it aids with fuel economy
d) it aids with fuel economy
Which of the following is not true of a lock-up torque converter? a) it eliminates slippage b) it is a mechanical link c) it reduces fluid temperature d) it increases fuel economy
c) it reduced fluid temperature
Which of the following is the fluid coupling that connects the engine's crankshaft to the transmission's input shaft? a) solenoid converter b) sator c) torque converter d) clutch assembly
c) torque converter
Vortex fluid flow provides for which of the following scenarios? a) torque multiplication b) stall speed c) high turbine speed d) High impeller speed
a) torque multiplication
