For 1990-2009 cars

#### First Gear Only

Checks | Cause
--- | ---
DEFINITION: The transmission only provides first gear in Drive range. The vehicle accelerates from a stop in first gear and does not upshift. First gear ratio is 2.921:1.
Control Valve Body Assembly |

• | The 1-2 shift valve (318) is stuck or binding.

• | Debris is found in the control valve body (301) or the control valve body spacer plate and gasket assembly (396)

• | The spacer plate and gaskets (369-371) are misassembled.

Second Clutch Assembly |

• | A missing or not seated second clutch backing plate retaining ring (627)

• | A missing or misassembled second clutch backing plate (626)

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

• | A 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)

Reverse Reaction Drum | Damaged splines of the reverse reaction drum (669)