Chrysler 2004 Concorde Service Manual page 1189

LH
42LE AUTOMATIC TRANSAXLE (Continued)
ATF is dyed red, while differential hypoid oil is
brown in color and has a distinctive odor.
There are two seals at the boundary of the two
sumps. There is a weep hole in the right side of the
transaxle case (Fig. 7) which vents the area between the
two seals. If oil is leaking from the weep hole, there is
at least one seal leaking. Never plug the weep hole to
correct a leaking condition. Plugging the weep hole
could result in contaminating one or both transaxle
sumps, low oil level, poor transaxle performance or
transaxle failure. In order to correctly repair this type
of leak the transaxle must be removed from the vehicle
and both transfer shaft seals replaced.
Fig. 7 Weep Hole Location
1 - RIGHT EXHAUST PIPE
2 - TRANSAXLE CASE
3 - TRANSAXLE OIL PAN
4 - WEEP HOLE
FLUID LEAKAGE-TORQUE CONVERTER HOUSING
AREA
When diagnosing converter housing fluid leaks,
three actions must be taken before repair:
(1) Verify proper transmission fluid level.
(2) Verify that the leak originates from the con-
verter housing area and is transmission fluid.
(3) Determine the true source of the leak.
Fluid leakage at or around the torque converter
area may originate from an engine oil leak (Fig. 8).
The area should be examined closely. Factory fill
fluid is red and, therefore, can be distinguished from
engine oil.
Some suspected converter housing fluid leaks may
not be leaks at all. They may only be the result of
residual fluid in the converter housing, or excess
fluid spilled during factory fill, or fill after repair.
Converter housing leaks have several potential
sources. Through careful observation, a leak source
can be identified before removing the transmission
for repair.
Fig. 8 Converter Housing Leak Paths
1 - PUMP SEAL
2 - PUMP VENT
3 - PUMP BOLT
4 - PUMP GASKET
5 - CONVERTER HOUSING
6 - CONVERTER
7 - REAR MAIN SEAL LEAK
Pump seal leaks tend to move along the drive hub
and onto the rear of the converter (Fig. 8). Pump
o-ring or pump body leaks follow the same path as a
seal leak. Pump attaching bolt leaks are generally
deposited on the inside of the converter housing and
not on the converter itself. Pump seal or gasket leaks
usually travel down the inside of the converter hous-
ing (Fig. 8).
TORQUE CONVERTER LEAKAGE
Possible sources of torque converter leakage are:
• Torque converter weld leaks at the outside diam-
eter weld (Fig. 9).
• Torque converter hub weld (Fig. 9).
Fig. 9 Converter Leak Points—Typical
1 - OUTSIDE DIAMETER WELD
2 - TORQUE CONVERTER HUB WELD
3 - STARTER RING GEAR
4 - LUG
TRANSAXLE 21 - 9