Technician A says planetary gears provide different gear ratios needed to move the vehicle. Technician B says automatic transmissions and transaxles must have at least three planetary gear sets. Who is correct?
A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because planetary gears are indeed used in automatic transmissions to provide the different gear ratios necessary for vehicle movement. Technician B is incorrect because automatic transmissions and transaxles do not necessarily need to have at least three planetary gear sets; the number can vary depending on the design and requirements of the transmission system.

Technician a Says Planetary Gears Provide Different Gear Ratios Needed