Ch 4 Transmissions & Transaxles Flashcards
When discussing the operation of a synchronizer,
Technician A says that the synchronizer inserts force the blocking ring against the conical face of the gear, which matches the speed of the gear and allows for engagement.
Technician B says that by matching the speed of the blocking ring and the gear, the synchronizer sleeve is able to engage with the gear dog teeth.
Who is correct?
Both A and B
When discussing shift mechanisms,
Technician A says that the detent system prevents the engagement of more than one gear at a time.
Technician B says that the interlock system places the shift rail and fork in an exact position.
Who is correct?
Neither A nor B
When discussing current trends in manual transmissions,
Technician A says that six- and seven-speed transmissions reduce fuel economy because of the weight of their extra parts.
Technician B says that some manual transmissions are shifted by internal solenoids and do not require a shift lever.
Who is correct?
B only
While discussing synchronizers,
Technician A says that in automotive transmissions, the commonly used type of synchronizer is the block type.
Technician B says that triple-cone synchronizers are not as effective because they are smaller than single-cone synchronizers.
Who is correct?
A only
When discussing overdrive gears,
Technician A says that the typical ratio is 0.70 to 0.90:1.
Technician B says that the typical ratio is 1.0:1.
Who is correct?
A only
When discussing the power-flow through a five-speed transmission when it is in first gear,
Technician A says that power enters in on the input shaft, which rotates the countershaft that is engaged with first gear.
Technician B says that the first gear synchronizer engages with the clutching teeth of first gear and locks the gear to the main shaft, allowing power to flow from the input gear through the countershaft and to first gear and the main shaft.
Who is correct?
B only
While discussing power-flow through the forward gears of a typical transaxle,
Technician A says the main speed gears freewheel around the output shaft unless they are locked to the shaft by the synchronizers.
Technician B says the main speed gears are in constant mesh with their mating gears on the input shaft and rotate whenever the input shaft rotates.
Who is correct?
Both A and B
While discussing reverse gear,
Technician A says if the transmission has a synchronized reverse gear, the reverse synchronizer sleeve moves to engage with reverse gear. Power comes in through the input shaft, into the counter gear, through the reverse idler gear, and into the reverse gear on the main shaft. The reverse gear rotates the synchronizer sleeve, which rotates the hub and main shaft in a reverse direction.
Technician B says if reverse is a nonsynchronized gear, a reverse-gear shift relay lever slides the reverse idler gear into contact with the countershaft reverse gear and the reverse gear on the output shaft. The reverse idler gear causes the reverse output shaft gear to rotate counterclockwise.
Who is correct?
Both A and B
When calculating the first gear ratio of a five-speed transmission,
Technician A says to divide the number of teeth on the front of the counter gear by the number of teeth on the clutch gear.
Technician B says to divide the number of teeth on the first-speed gear by the number of teeth on the matching counter gear and then multiply the answer from the first set by the second.
Who is correct?
Both A and B
While discussing shift forks,
Technician A says most shift forks have two fingers that ride in the grooves on the outside of the speed gears.
Technician B says each shift rail has three notches, which a spring-loaded ball or plunger rides in to give a detent feel to the shift lever and locates the proper position of the shift fork.
Who is correct?
B only
