| 摘要 |
A clutch assembly of the present invention includes a clutch housing having a plurality of housing splines. A plurality of clutch plates are disposed within the housing splines. The clutch assembly further includes a clutch hub having a plurality of hub splines. A plurality of friction plates are disposed within the hub splines and are interposed between the plurality of clutch plates. An apply piston is adapted to engage the clutch plates and the friction plates. The clutch assembly also includes a balance piston having a shoulder portion. A retaining ring is disposed in a retainer groove defined by a rotating shaft. The retaining ring is adapted to engage the balance piston such that the retaining ring is radially retained by the shoulder portion and the retaining ring therefore cannot expand and slip out of the retainer groove. A return spring is preferably disposed between the apply piston and the balance piston. The return spring is adapted to axially bias the balance piston into engagement with the retaining ring to maintain the engagement of the retaining ring by the shoulder portion.
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