Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 18, 2011
Patent Application Number
12036641
Date Filed
February 25, 2008
Patent Primary Examiner
Patent abstract
The present invention provides an eight speed automatic transmission for motor vehicles having three planetary gear sets, four friction clutches, a friction brake, a band brake and an optional overrunning clutch. The eight speed transmission according to the present invention exhibits good gear ratio progression and high efficiency due to its excellent gear mesh efficiency, low spin losses and low pinion speeds.
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