Join Date: May 1999
Location: SE Florida, USA
The coast clutch is also applied by the PCM when the trans goes into OD.
The coast clutch is NOT applied in overdrive. If it were on there would be a tie up, which is when all parts of the planetary gearset are held to the case. That means that the output shaft would immediately stop turning, which means the wheels would stop turning. There is engine braking in overdrive without the coast clutch applied.
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Automatic Transmission Engineer 1988-2007
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