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Buick
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1990
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Electra Estate Wagon V8-307 5.0L
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Repair and Diagnosis
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Transmission and Drivetrain
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Automatic Transmission/Transaxle
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Testing and Inspection
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Initial Inspection and Diagnostic Overview
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200-4R Automatic Transmission
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Coast Downshift
Coast Downshift
With gear selector in overdrive, accelerates to 4th gear with
TCC
applied, then release accelerator, lightly apply brakes and observe TCC release and downshift shift points.