For 1990-2009 cars

#### Slips in 1st Gear

Checks | Causes
--- | ---
Forward Clutch Assembly (646-651) |

• | Clutch plates worn

• | Porosity or damage in forward clutch piston

• | Forward clutch piston inner and outer seals missing, cut or damaged

• | Damaged forward clutch housing

• | Forward clutch housing retainer and ball assembly not sealing or damaged

Forward Clutch Accumulator (353-358) |

• | Piston seal missing, cut or damaged

• | Piston out of its bore

• | Porosity in the piston or valve body

• | Stuck abuse valve

Input Housing and Shaft Assembly (621) | Turbine shaft seals missing, cut or damaged
Valve Body (60) |

• | 1-2 Accumulator valve stuck

• | Face not flat, damaged lands or interconnected passages

• | Spacer plate or gaskets incorrect, mispositioned or damaged

Low Roller Clutch (678) |

• | Damage to lugs to inner ramps

• | Rollers not free moving

• | Inadequate spring tension

• | Damage to inner splines

• | Lube passage plugged

Torque Converter (1) | Stator roller clutch not holding
1-2 Accumulator Assembly (55-57, 104) |

• | Porosity in piston or 1-2 Accumulator cover and pin assembly

• | Damaged ring grooves on piston

• | Piston seal missing, cut or damaged

• | Valve body to spacer plate gasket at 1-2 Accumulator cover, missing or damaged

• | Leak between piston and pin

• | Broken 1-2 Accumulator spring

Line Pressure | Refer to Oil Pressure High or Low .
2-4 Servo Assembly (13-28) | 4th Servo piston in backward