Exam 18: Automatic Transmissions

Technician A says that to produce fifth gear in an Allison hydromechanical 5-speed transmission the fourth and forward clutches must be applied.Technician B says that to produce fourth gear in the same transmission,the second and forward clutches must be applied.Who is correct?

In a typical truck Allison transmission,when a low planetary gearset is used,where is it located?

Which of the following can influence upshifts in an Allison hydromechanical transmission?

What is used to avoid shift shock in Allison hydromechanical transmissions?

How are multiple disc clutches used in truck automatic transmissions?

Which of the following statements is true of an Allison hydromechanical transmission?

Technician A says that when the first and fourth clutches are applied in an Allison hydromechanical 4-speed transmission,the output will be reverse.Technician B says that when the first and fourth clutches are applied in an Allison 5-speed transmission,the output will be reverse.Who is correct?

What does the number of clutch plates and friction discs used in a clutch pack depend on?

Technician A says that the multiple components that make up a planetary carrier assembly count as a single gear.Technician B says that if there is to be output from a planetary gearset,the planetary pinions in the planetary carrier MUST be rotating on their own axes.Who is correct?

Technician A says that an Allison hydromechanical transmission can be operated in PTO mode when the engine is running and the transmission is in neutral.Technician B says that an Allison transmission PTO gear is driven by the torque converter turbine.Who is correct?

What is used to regulate main pressure in an Allison hydromechanical transmission?

Which of the following can increase the retarding efficiency of an input retarder on an Allision hydromechanical automatic transmission during braking?

Technician A says that there are six separate clutches in an Allison four-speed transmission.Technician B says that there are six separate clutches in an Allision five-speed transmission.Who is correct?

Which of the following factors determines the transmission governor pressure?

How many planetary gearsets are used in a four-speed,Allison hydromechanical automatic transmission?

When both the ring gear and the sun gear of a simple planetary gearset are driven in the same direction at the same speed,at what speed is the carrier turning?

What drives the oil pump in a typical Allison hydromechanical transmission?

What will be the output result in a planetary gearset whenever the carrier is the input member?

Which of the following types of chassis auxiliary braking devices can be integrated into an Allison automatic transmission?

In which gear selector position on an Allison hydromechanical transmission should main pressure be at its highest?