Exam 21: Continuously Variable Transmissions

Technician A says typically, a variable-diameter pulley (VDP) gear ration is 3:1 through the pulleys from a dead stop. Technician B says as the vehicle gains speed, the input pulley diameter increases, while the output pulley diameter decreases. Who is correct?

Technician A says the longitudinal steel bands in a continuously variable transmission (CVT) are used to hold the belt together and keep the steel plates lined up. Technician B says these bands used in a CVT hold the plates closely together in a very strong and flexible ring. Who is correct?

Technician A says the toroidal continuously variable transmission (CVT) cannot handle as high an amount of torque as a belt-driven CVT. Technician B says toroidal CVTs use special transmission fluid to prevent wear to the rollers. Who is correct?

Technician A says most manufacturers recommend repairing internal components of their continuously variable transmissions (CVTs). Technician B says specialty tools are required to compress the output pulley and reinstall the belt on most CVTs. Who is correct?

Which of these is likely to be used in a modern variable pulley continuously variable transmission (CVT)?

Technician A says the toroidal continuously variable transmission (CVT) can handle larger amounts of torque than a belt-driven CVT. Technician B says toroidal CVTs use special transmission fluid to prevent wear to the rollers. Who is correct?

Technician A says the steel belt used in a continuously variable transmission (CVT) is made up of hundreds of transversely mounted steel plates that are held in place with several steel bands. Technician B says the transverse steel plates slip on the sides of the pulley and in turn are pushed by the pulley. Who is correct?

In a variable-diameter pulley CVT, each of the pulleys has two movable drive faces called ________.

Technician A says that Variable Diameter Pulley (VDP) Continuously Variable Transmissions (CVT) are commonly rebuilt. Technician B says that VDP CVT's require regular fluid changes. Who is correct?

Technician A says the electronic continuously variable transmission is used in Toyota and Ford hybrid vehicles. Technician B says the variable-diameter pulley continuously variable transmission (CVT) is the most common type of CVT being used in vehicles today. Who is correct?

Technician A says some manufacturers have programmed into the Powertrain Control Module (PCM) regular shift points for their continuously variable transmission (CVT), at which the pulley sheaves will move to predetermined positions to create the feel of separate conventional shifts. Technician B says some manufacturers allow the driver to manually shift through these predetermined pulley diameters while driving the vehicle. Who is correct?

All of the following are the advantage of using the CVT in the vehicle except:

Which of the following is improved because a Continuously Variable Transmission (CVT) permits the engine to operate in its most efficient operating rpm range?

Technician A says most manufacturers use a limited number of multi-disc clutch packs and a set of planetary gears to allow the continuously variable transmission (CVT) to operate in reverse. Technician B says some hybrid transmissions use planetary gear sets to create a two-speed CVT. Who is correct?

Which of the following is improved because a Continuously Variable Transmission (CVT) permits the engine to operate in its most efficient operating rpm range?

The variator assembly should be replaced in all of the following conditions except:

Technician A says the electronic continuously variable transmission is used in Toyota and Ford hybrid vehicles. Technician B says the variable-diameter pulley continuously variable transmission (CVT) is the most common type of CVT being used in vehicles today. Who is correct?

Technician A says that a belt can fall apart during installation, requiring a time-consuming process to reassemble. Technician B says that if the belt is damaged during assembly, it is ok to use as it is new. Who is correct?

Which of these is not used in a continuously variable transmission (CVT)?

Tech A states that a CVT belt must be installed in the correct direction or the transmission will slip. Tech B states that CVT belts are lubricated using splash lubrication from the transmission case. Who is correct?