Automatic Transmissions and Planetary gear sets

In order to get output from a planetary gearset what much happen?

• Drive a member

• Hold or stop a member

• Drive a member and hold a member

• None of these

This is the center gear of a planetary gear set.

• Ring gear

• Pinion

• Carrier

• Sun gear

This is the outermost gear of the planetary gear set.

• Ring gear (annulus)

• Pinions

• Carrier

• Sun gear

Check all parts of a simple planetary gearset.

• Sun gear

• Carrier and pinions

• Output shaft

• Ring gear (annulus)

• Input shaft

What is a compound planetary gearset ?

• A gear set that uses 2 or more pinion gears

• A gear set that is built into the transmission case

• Two simple plantary gear sets that share a common member

• A gear set that uses an input shaft to drive the wheels

The simpson planetary gear set in the 904 transmission produces 3 forward gear ratio's and one reverse. True or False

• True

• False

The Planetary gear set is used in automatic transmissions because?

• They are cheap to produce

• simple compared to manual tranmission gear boxes

• Strong and compact

• Easier to understand

What is the difference between a 3 pinion planetary carrier and a 6 pinion planetary carrier? (select all correct)

• Amount of torque it can hold

• The weight

• The streagth

• Its ratio

The apply devices in the transmission hold, stop or drive different members of the planetary gearset.

• True

• False

What happens if two members of the planetary gear set are driven? (select all correct)

• The gear set locks up and spins together

• Direct drive 1:1

• underdrive

• Over drive