ASE A2 Automatic Transmission Test Questions with Correct Answers

Shortcoming of an internal combustion engine? It doesn't develop enough power at low rpm to overcome the inertia of a vehicle What happens to torque when engine rpm increases? Torque increases up to its peak torque then begin to fall even if rom continues to increase Gear ratio refers to? the number of revolutions that the input gear makes in relation to the output gear Three primary parts of a planetary gear set? - the sun gear - the planetary pinion carrier - the ring or internal gear Sun great location and design - center of the gearset, in the same way that the sun is positioned at the center of the solar system - This gear meshes with the teeth of the planetary pinion gears and can be either a spur or helical cut design Planetary carrier construction - constructed of cast iron, aluminum, or steel, contains an individual shaft for each of the planetary pinion gears, and keeps these gears evenly spaced around the sun gear - Needle bearings are used between the planetary pinions and the carrier shafts - The planetary assemblies in most automatic transmissions use four, five, or six pinion gears, which are kept in constant mesh with both the sun gear and the ring gear. What is the ring gear? - largest member of the gearset - works like a band that keeps the entire gearset together - also called the internal gear or annulus, since its teeth are on the inside of the gear - These internal teeth mesh with and ride around on the planetary pinions Most automatic transmissions rely on at least how many compound gear sets? 3 Gear Sets that transfer power and multiply engine torque to drive scales are called? Compound gear sets Two most common compound gear sets? - Ravingeaux gear set