For 1990-2009 cars

#### Harsh Park to Reverse/Drive Engagement

Checks | Cause
--- | ---
DEFINITION: Gear engagement that is harsh when the engine is idling in Park or Neutral, and the gear selector is moved to Drive or Reverse range.
Transmission Main Line Pressure | High transmission main line pressure
Reverse Band Servo Assembly - Reverse engagement only | The reverse band servo piston cushion spring (45) is broken or is missing.
Forward Band Servo Assembly - Drive engagement only | The forward band servo piston cushion spring (19) is broken or is missing.
Transmission Case Cover Ball Check Valve - Reverse engagement only | The #5 Ball check valve (372) is mislocated or is missing.
Transmission Case Cover Ball Check Valve - Drive engagement only | The #6 Ball check valve (372) is mislocated or is missing.
Control Valve Body Assembly - Reverse engagement only | The reverse servo boost valve (367A) is binding or is damaged.
Control Valve Body Assembly - Drive engagement only | The forward servo boost valve (367B) is binding or is damaged.
Control Valve Body Spacer Plate Assembly - Drive engagement only | The thermal element is damaged or is not functioning properly.