Technician A says that the Simpson gear train can combine 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 allows for oil to escape more readily during application. Technician B says that 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 an automatic transmission, governor pressure varies with the speed of the input shaft.
A customer requests that you change his automatic transmission''s 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 operating with a low oil level may result in:
An increase in transmission oil temperature will:
When towing a vehicle equipped with an automatic transmission more than 1/2 a mile you should disconnect the drive line or raise the drive wheels.
The modular valve is controlled by vacuum on gasoline engines and by mechanical linkage 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?
When checking fluid from an automatic transmission, a technician should:
Technician A says that automatic transmission gaskets cannot 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?
The shifting of gears in an automatic transmission is actuated by the use of:
The planetary gear set has gears that are:
If two members of a gear set are locked together, the result is:
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. Mechanics B says that all large 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?
To prevent damage to the transmission from metal particles, transmissions may use:
Pressure relief valves control fluid pressure by using.
The timing of shifts in an automatic transmission are controlled by:
In Allison deep ratio models of transmissions, only first gear through the low (deep reduction) planetary gear set.
An automatic transmission with a high oil level may overheat due to:
If anti-freeze (ethylene glycol) mixes with the transmission fluid you must:
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 governor pressure is too high. Who is correct?
An extra planetary gear set to provide for a deep ratio model is found in the Allison:
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 specification, what may be the problem?
In a planetary gear set with the sun held and the carrier driven, what do you have?
Warped or damaged clutch packs in an automatic transmission would most likely:
Clutches used in auto, trans. are:
In order to provide reduction, overdrive or reverse, an automatic or powershift transmission uses:
Multi-disc clutches can only be used for holding, never for driving.
As with any hydraulic system, the transmission fluid is retained in a:
If a passage has a 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:
When the system using the restriction described in the previous question has the device applied and the fluid stops flowing, the pressure after the restriction would be:
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:
Mechanic A says that ball valves will allow fluid to flow in more than one direction, but will not control 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?
The pressure that relates to the amount of load on the engine is:
When checking a transmission, the first item that you should inspect for is:
The best source for service information is:
To prevent contaminants from entering the system during removal you should:
The hydraulic operation of any transmission can be visually described by using:
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