Technician A says that the Simpson gear train combines multiple simple planetary gear sets so that load can be spread over a greater number of teeth. Technician B says that the Simpson gear train is able to obtain the largest number of gear ratios possible in a compact area. Who is correct?
The _____________ gear acts like a band to hold the entire planetary gear set together.
When an external gear tooth is in mesh with an internal gear, the output rotation for both gears will be the same.
In a planetary gear set, if both the sun and ring gear are held you would have:
Maximum forward reduction is achieved when the ______________ gear(s) is (are) stationary.
The oil pump in an automatic transmission circulates fluid for the purpose of:
Technician A says that grooving of multiple disc clutch discs allows for oil to escape more readily during application. Technician B says the purpose of these grooves is to reduce suction between the discs and plates during release by allowing oil to enter more readily. Who is correct?
In Allison deep ratio models of transmissions, only the lowest gear is driven through the low (deep reduction) planetary gear set.
In an automatic transmission, governor pressure varies with the speed of the output shaft.
A customer requests that you change his automatic transmission oil and filter. Upon removing the oil pan you find a great deal of sludge in the oil pan. The probable source of this contamination would be from:
An automatic transmission with a high oil level may overheat due to:
An automatic transmission operating with a low oil level may result in:
If anti-freeze (ethylene glycol) mixes with the transmission fluid you must:
Transmission fluid in the radiator tank of the vehicle could be an indication of a faulty transmission oil cooler.
An increase in the transmissions input speed will:
An increase in transmission oil temperature will:
When towing a vehicle equipped with an automatic transmission more than 1/2 mile you should disconnect the drive line or raise the drive wheels.
The TV circuit uses a modulator valve actuated by vacuum on gasoline engines, and by mechanical linkage or cables on diesel engines.
When overhauling an automatic transmission you should also:
When the carrier is held and the sun is the drive gear, in a simple planetary gear set, you would have:
When the carrier is held and the ring is the drive gear, in a simple planetary gear set, you would have:
When the ring is held and the sun is the drive gear, in a simple planetary gear set, you would have:
When the ring is held and the carrier is the drive gear, in a simple planetary gear set, you would have:
Technician A says that whenever the engine is running the oil pump in the automatic transmission is running. Technician B says that whenever the engine is running the torque converter is turning. Who is correct?
Technician A says that the inhibitor valve inhibits upshifting when the governor pressure is too high. Technician B says that the inhibitor valve inhibits downshifting when the governor pressure is too high. Who is correct?
An extra planetary gear set to provide for a deep ration model is found in the allison.
Which of the following may cause an unusually high temperature in an automatic transmission?
Stall testing is done with:
When stall testing there is maximum:
When stall testing there is a great deal of heat generated.
When stall testing if engine RPM reading is 400 RPM over specifications, what may be the problem?
When stall testing if engine RPM reading is 400 RPM under specifications, what may be the problem?
When performing a stall test on an automatic transmission and torque converter, the engine RPM is 200 RPM below manufacturer''s specifications, what may be the problem?
An automatic transmission will not go into gear in either forward or reverse at an idle, the transmission oil pressure is normal, what may be the problem?
It is not necessary to test the equipment after overhaul if you did the job right.
Before installing frictional clutches or bands you should:
To prevent contaminants from entering the system during removal you should
The most important aspect of automatic transmission repair is:
The best source for service information is:
In addition to testing fluid pressure in the transmission, you may also have to test for:
Mechanic A says that generally speaking, transmission failures will be either hydraulic or mechanical. Mechanic B says that you should check the fluid and have it analyzed only if you suspect transmission failure. Who is right?
Before condemning a transmission for improper operation and removing for overhaul you should:
You can determine if the fluid you are going to use matches manufacture''s requirements by checking the:
When checking for proper operation of the transmission, you should:
If the origin of a fluid leak is difficult to locate, you can:
When checking a transmission for operation, the first item that you should inspect for is:
The valve which allows travelling speed to be slowed combined with the operation of the brakes is the:
A trimmer valve is used to:
The hydraulic operation of any transmission can be described by using:
One type of powershift control system has a safety valve that:
The timing of shifts in an automatic transmission is controlled by:
Mechanic A says that when the throttle is wide open and engine intake manifold pressure is low, then the hydraulic pressure from the throttle pressure regulator will be high. Mechanic B says that throttle pressure is directly related to output shaft speed. Who is right?
The pressure that relates to the amount of load on the engine is:
The purpose of an accumulator is to prevent damage to the pump if the pressure in the system should fluctuate.
Mechanic A says that transmission ball check valves may direct fluid to flow in one direction or another, but will have no affect on pressure. Mechanic B says that spring pressure on a spool valve can be increased or decreased by using mechanical linkage and a lever. Who is right?
If a basic spool valve has equal pressure applied to both ends and one end has a face that is twice as large as the other end, the valve will move
Pressure relief valves control fluid pressure by using:
If a passage has restriction that is 50% smaller than the normal passage size and input pressure is 350 psi, then the pressure after the restriction when fluid is flowing would be
To prevent damage to the transmission from metal particles, some transmission will use
Automatic transmission pumps are always driven by the torque converter.
As with any hydraulic system, the transmission fluid is retained in a
62) Mechanic A says that different combinations of holding and driving clutches used with different gear sets will provide all of the ranges required by a transmission. Mechanic B says that powershift transmissions usually have a parking pawl to prevent movement of the output shaft when the transmission does not have any clutches or bands applied to provide drive. Who is right?
Multi -disc clutches can only be used for holding, never for driving.
Any time a vehicle equipped with an automatic transmission must be towed any distance, you should always
In order to provide gear reduction, overdrive or reverse, an automatic or powershift transmission uses
If the planet carrier is held and the ring gear is input, the result from the sun gear would be
If the ring gear is held and the planet carrier is input, the result from the sun gear will be
If the sun gear is held and the ring gear is the input, the result from the planet carrier is
If any two members of a gear set are locked together, the result is
The gear that is held in a planetary gearset is the
The planetary gear set has gears that are
Early powershift transmissions are different from automatic transmissions in that they
Powershift transmission will provide deceleration if they are
Before inspecting a machine that has a power shift transmission
When checking fluid from an automatic transmission, a technician should
Technician A says that automatic transmission gaskets must not be replaced by silicon sealants because of possible inhalation into the hydraulic system of the transmission. Technician B says that any place a gasket is used, there is an appropriate silicon sealant that can be substituted. Who is right?
To remove a transmission oil pump, a technician must
The part of the torque converter or fluid coupling that is driven by the engine is the
Fluid motion in the converter is caused by
Fluid couplings are not as efficient as torque converters because
Fluid flow that occurs at an angle to the impeller and is a spiral type of flow is called
Fluid flow that occurs in the same direction as the motion of the impeller is called
Coupling speed occurs when
Stators may be held by
The circular flow of oil between the pump and the turbine is called
The operation of a hydraulic lock-up converter requires the use of control valves.
High transmission fluid levels are better than low fluid levels.
Pressure testing the converter after it is removed is done to determine
Stall testing determine
Please select 2 correct answers
Mechanic A says that interference checks can only be performed on converters that can be disassembled. Mechanics B says that performance tests are not necessary after reassembly. Who is right
In a torque converter when the turbine is turning at almost the same speed as the impeller
Technician A says the basic difference between a fluid coupling and a torque converter is that a fluid flywheel has straight blading whereas a torque converter has curved blades also the torque converter has a stator and a fluid coupling does not. Technician B says that the torque converter has the ability to multiply engine torque, the fluid coupling does not have this ability. Who is correct?
In many cases the torque converter, because of its mass, takes the place of the engine flywheel.
Technician A says the pump (impeller) is the input or drive member of the torque converter. Technician B says the turbine is the output or driven member of the torque converter. Who is correct?
The stator in a torque converter is
The torque convertor pump (impeller) is positioned closest to the engine.
The torque convertor turbine blades have a greater curve than the impeller blades.
Some torque converters are equipped with a lockup clutch, this lockup
Which of the major torque converter parts is responsible for torque multiplication within the unit?
The lockup clutch in a torque converter is the same as the overrunning clutch.
The torque converter has
Torque converter stall is when the impellor is rotating under power and the turbine is stopped.
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