For 1990-2009 cars

Checks | Cause
--- | ---
DEFINITION: One of the two following conditions occurs during a first to second gear steady throttle upshift, or a second to first gear coast, or a light to moderate throttle detent downshift:

• | Harsh shift feel -- an unacceptable quick gear change occurs.

• | Soft shift feel -- an unacceptable long gear change occurs.

Automatic Transmission Fluid Level - soft shift only | Low fluid level
Transmission Main Line pressure | Low or high transmission main line pressure
Oil Filter Assembly - soft shift only |

• | The oil filter assembly (100) is missing, plugged, or damaged.

• | The oil filter seal assembly (101) is missing or damaged.

1-2 Accumulator Assembly |

• | Misassembled or upside down 1-2 accumulator assembly

• | Damaged or missing 1-2 accumulator piston oil seal ring (137A)

• | A damaged or missing 1-2 accumulator piston cushion spring (139) or outer spring (142)

• | A stuck or binding 1-2 accumulator piston (136A)

• | Debris in the passages of the accumulator cover spacer plate (134)

Control Valve Body Assembly |

• | Debris in the passages of the control valve body (301) or spacer plate assembly (370)

• | Missing or mislocated #2 ball check valve (372)

• | Misassembled 1-2 accumulator valve (340-345) line-up

• | Stuck or binding 1-2 accumulator valve (341)

• | Damaged or missing 1-2 accumulator valve spring (340)

• | Missing, damaged, or misassembled 2-3 accumulator valve bushing (345), bore plug (343), or retainers (342, 385)

Driven Sprocket Support Assembly - soft shift only |

• | A damaged second clutch housing oil seal rings (613) or the four lobe oil seal ring seals (612)

• | Worn or damaged second clutch housing bushings (616, 619)

Second Clutch Assembly |

• | Missing or not seated second clutch basking plate retaining ring (627)

• | Missing or misassembled second clutch backing plate (626)

• | Worn, damaged or misassembled clutch plates (623-625)

• | Missing or not seated second clutch spring retaining ring (622)

• | A damaged spring assembly (621) or piston (620)

• | A missing or damaged second clutch housing ball check valve assembly (618)

• | A damaged second clutch housing assembly (617)