For 1990-2009 cars

#### Transmission Component Fluid Leaks

Checks | Cause
--- | ---
DEFINITION: Automatic transmission fluid leaks that occur on the transmission
Automatic transmission fluid level | High fluid level -- causing an oil leak at the vent assembly (37)
Automatic transmission fluid condition |

• | Contaminated with engine coolant, engine oil, brake fluid, etc.

• | Oxidized and degraded -- causing oil foaming and an oil leak at the vent assembly

Vent assembly | The vent assembly (37) is plugged or damaged -- causing high internal pressure inside the transmission and causing oil leakage at another component
Oil pan assembly |

• | The oil pan bolts and screws are loose, cross-threaded, or missing

• | The oil pan (24) is damaged

• | The oil pan gasket (25) is out of position or damaged

Oil filter and seal assembly |

• | The oil filter assembly (100) is damaged

• | The oil filter seal assembly (101) is missing or damaged -- causing oil foaming and an oil leak at the vent assembly

Thermo element assembly |

• | The thermo element plate pins (120, 123) are misadjusted

• | The thermo element (121) or thermo element plate (122) is out of position, missing, or damaged -- causing a high fluid level in the oil pan, oil foaming, and an oil leak at the vent assembly (37)

Control valve body cover assembly |

• | The control valve body bolts and screws (56, 57, 58) are loose, cross-threaded, or missing

• | The control valve body cover (53) is porous or damaged

• | The control valve body cover gaskets (54, 59) are out of position or damaged

• | The wiring harness assembly (224) is damaged or is leaking at the electrical connector terminals

Front wheel drive shaft oil seal assemblies | The front wheel drive shaft oil seal assemblies (4, 409) are loose or damaged
Forward band servo assembly |

• | The forward band servo cover bolts and screws (12) are loose, cross-threaded, or missing

• | The forward band servo cover (13) is porous or damaged

• | The forward band servo cover seal (14) is out of position or is damaged

Reverse band servo assembly |

• | The reverse band servo cover retaining ring (39) is out of position or is damaged

• | The reverse band servo cover (40) is porous or is damaged

• | The forward band servo cover seal (14) is out of position or is damaged

Oil cooler pipe fitting assemblies | The oil cooler pipe fitting assemblies (28, 29) are loose, cross-threaded, damaged, or are missing a sealer
Case extension assembly |

• | The case extension bolts and screws (5) are loose, cross-threaded, or are missing

• | The case extension assembly (6) is porous or damaged

• | The case extension seal (8) is out of position or is damaged

• | The front differential carrier bushing (7A) or the output shaft bearing assembly (7B) is worn or damaged

• | The case extension assembly (6) oil drain back holes are plugged or missing -- causing repeat leaks at the right side front wheel drive shaft oil seal assembly (4)

Vehicle speed sensor assembly |

• | The vehicle speed sensor bolt or screw (9) is loose, cross-threaded, or missing

• | The vehicle speed sensor O-ring seal (11) is out of position or is damaged

Oil pressure test hole plug | The oil pressure test hole plug (38) is loose, cross-threaded, damaged, or is missing a sealer
Manual shift shaft assembly |

• | The manual shift shaft seal assembly (806) is out of position or is damaged

• | The manual shift shaft (807) sealing surface is damaged

Park pawl actuator guide assembly |

• | The park pawl actuator pin (808) is loose or missing

• | The park pawl actuator guide (809) is damaged

• | The park pawl actuator guide O-ring seal (810) is out of position, missing, or damaged

Torque converter oil seal assembly | The torque converter oil seal assembly (525) is loose or damaged
Drive sprocket support assembly | The drive sprocket support (522) oil drain back holes are plugged or missing -- causing repeat leaks at the torque converter oil seal assembly (525)
Case assembly | The case assembly (3) is porous or damaged