Automatic Transmission 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. |
| • | Channel plate gasket (430) improperly torqued. |
|
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 cover 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.
|
