Can anyone tell me about the diagnosis and repair of gearbox shift solenoid valve failure?

Big shifting shock 1. Fault phenomenon (1) While driving, the car has an obvious impulse when the automatic transmission upshifts. (2) When starting, the car will vibrate more seriously when shifting from parking gear or neutral gear to reverse gear or forward gear. 2 Causes of failure (1) The piston of the vibration damping pressure accumulator is stuck and cannot dampen the vibration. (2) The main oil line pressure regulating valve is faulty, causing the main oil line oil pressure to be too high. (3) The steel ball of the one-way valve is missing and the shift actuator engages too quickly. (4) The engine idling speed is too high. (5) The throttle cable or throttle position sensor is improperly adjusted, causing the main oil line oil pressure to be too high. (6) Upshift too late.