Possible Diagnostic trouble code set

Refer to Causes of High or Low Oil Pressure

#4 Checkball

Mislocated for a soft shift

#9 Checkball

Mislocated for a harsh shift

2-3 Accumulator Piston, Gaskets, and Seals

Control Valve Assembly

Missing #9 checkball

2-3 Accumulator Valve

Stuck valve

Control Valve Assembly

Missing #9 checkball

2-3 Accumulator Valve

Stuck valve