| 摘要 |
A differential gear unit has a pinion gear that can spin as well as revolve, a differential case that has a pinion retaining portion that supports the pinion gear, and a pair of side gears that mesh with the pinion gear. Frictional force generated at a portion where the pinion gear contacts the pinion retaining portion when the rotation speed of one side gear is faster than the rotation speed of the other side gear is different from the frictional force generated between the pinion gear and the pinion retaining portion when the rotation speed of the one side gear is slower than the rotation speed of the other side gear.
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