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
|
