Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 2033
5. If the underdrive clutch pressure is greater than 5 psi in Step 4 of Test Two-A, a defective solenoid/pressure
switch assembly or controller is the cause.
ALL PRESSURE SPECIFICATIONS ARE PSI (on hoist, with wheels free to turn)
Gear Selector
Position
Actual Gear
PRESSURE TAPS
Under-
drive
Clutch
Over-
drive
Clutch
Reverse
Clutch
Torque
Converter
Clutch
Off
Torque
Converter
Clutch
On
2/4
Clutch
Low/
Reverse
Clutch
PARK - 0 mph *
PARK
0-2
0-5
0-2
60-110
45-100
0-2
115-
145
REVERSE - 0 mph
*
REVERSE
0-2
0-7
165-235
50-100
35-85
0-2
165-
235
NEUTRAL - 0 mph *
NEUTRAL
0-2
0-5
0-2
60-110
45-100
0-2
115-
145
Low - 20 mph #
FIRST
110-145
0-5
0-2
60-110
45-100
0-2
115-
145
Third - 30 mph #
SECOND
110-145
0-5
0-2
60-110
45-100
115-
145
0-2
Third - 45 mph #
DIRECT
75-95
75-95
0-2
60-90
45-80
0-2
0-2
OD - 30 mph #
OVERDRIVE
0-2
75-95
0-2
60-90
45-80
75-95
0-2
OD - 50 mph #
OVERDRIVE WITH
TCC
0-2
75-95
0-2
0-5
60-95
75-95
0-2
* Engine Speed at 1500 rpm
# CAUTION: Both wheels must be turning at same speed.
CLUTCH AIR PRESSURE TESTS
Inoperative clutches can be located by substituting air
pressure for fluid pressure. The clutches may be
tested by applying air pressure to their respective pas-
sages after the valve body has been removed. Use
Plate Set 6599-1 (1) and 6599-2 (1) to perform test.
To make air pressure tests, proceed as follows:
NOTE: The compressed air supply must be free of
all dirt and moisture. Use a pressure of 30 psi.
1. Remove oil pan and valve body. (Refer to 21 -
TRANSMISSION/AUTOMATIC
-
42RLE/VALVE
BODY - REMOVAL)
2. Apply air pressure to the holes in the plates (1),
one at a time.
3. Listen for the clutch to apply. It will give a slight
thud sound. If a large amount of air is heard escap-
ing, the transmission must be removed from vehi-
cle, disassembled and all seals inspected.
2/4 CLUTCH
Apply air pressure to the feed hole located on the 2/4 clutch retainer (2). Look in the area where the 2/4 piston
contacts the first separator plate and watch carefully for the 2/4 piston to move rearward. The piston should return
to its original position after the air pressure is removed.
Air Pressure Test Plate
1 - AIR PRESSURE TEST PLATES
2 - 2/4 CLUTCH RETAINER HOLE
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AUTOMATIC TRANSMISSION 42RLE - SERVICE INFORMATION
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OVERDRIVE CLUTCH
Apply air pressure to the overdrive clutch apply passage and watch for the push/pull piston to move forward. The
piston should return to its starting position when the air pressure is removed.
REVERSE CLUTCH
Apply air pressure to the reverse clutch apply passage and watch for the push/pull piston to move rearward. The
piston should return to its starting position when the air pressure is removed.
LOW/REVERSE CLUTCH
Apply air pressure to the low/reverse clutch feed hole passage. Look in the area where the low/reverse piston con-
tacts the first separator plate. Watch carefully for the piston to move forward. The piston should return to its original
position after the air pressure is removed.
UNDERDRIVE CLUTCH
Because this clutch piston cannot be seen, its opera-
tion is checked by function. Use an air nozzle (2) to
apply air pressure is to the low/reverse or the 2/4
clutch opening in Test Plate 6599-1 (2). This locks the
output shaft. Use a piece of rubber hose wrapped
around the input shaft and a pair of clamp-on pliers to
turn the input shaft. Next apply air pressure to the
underdrive clutch. The input shaft should not rotate
with hand torque. Release the air pressure and con-
firm that the input shaft will rotate.
FLUID LEAKAGE
FLUID LEAKAGE - TORQUE CONVERTER HOUSING AREA
When diagnosing converter housing (5) fluid leaks,
three actions must be taken before repair:
1. Verify proper transmission fluid level.
2. Verify that the leak originates from the converter
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 (7). 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.
Pump seal (1) leaks tend to move along the drive hub and onto the rear of the converter. Pump o-ring or pump
body leaks follow the same path as a seal leak. Pump attaching bolt (3) leaks are generally deposited on the inside
of the converter housing (5) and not on the converter itself. Pump seal (1) or gasket (4) leaks usually travel down
the inside of the converter housing.
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AUTOMATIC TRANSMISSION 42RLE - SERVICE INFORMATION
21 - 667
TORQUE CONVERTER LEAKAGE
Possible sources of torque converter leakage are:
•
Torque converter weld leaks at the outside diam-
eter weld (1).
•
Torque converter hub weld (2).
STANDARD PROCEDURE - ALUMINUM THREAD REPAIR
Damaged or worn threads in the aluminum transmission case and valve body can be repaired by the use of Heli-
Coils
T
, or equivalent. This repair consists of drilling out the worn-out damaged threads. Then tap the hole with a
special Heli-Coil
T
tap, or equivalent, and installing a Heli-Coil
T
insert, or equivalent, into the hole. This brings the
hole back to its original thread size.
Heli-Coil
T
, or equivalent, tools, and inserts are readily available from most automotive parts suppliers.
REMOVAL
1. Disconnect the negative battery cable.
2. Raise and support the vehicle.
3. Mark propeller shaft (1) and the transmission
flange (4) for assembly alignment.
4. Remove the bolts (2) holding the rear propeller
shaft coupler (3) to the transmission flange (4).
5. Slide the propeller shaft (1) rearward until the cou-
pler clears the propeller shaft pilot (5) on the trans-
mission output shaft.
6. Remove the bolts (2) holding the starter motor (1)
to the transmission. (Refer to 8 - ELECTRICAL/
STARTING/STARTER MOTOR - REMOVAL)
7. Remove the starter (1) from the transmission
starter pocket and safely relocate.
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AUTOMATIC TRANSMISSION 42RLE - SERVICE INFORMATION
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8. Remove the bolt (2) holding the torque converter
access cover (1) to the transmission, 3.5L engines.
9. Remove the torque converter access cover (1)
from the transmission.
10. Remove the structural collar bolts (3, 4) and stuc-
tural collar (2) on vehicles equipped with 2.7L
engines. (Refer to 9 - ENGINE - 2.7L/ENGINE
BLOCK/STRUCTURAL COVER - REMOVAL)
11. Rotate crankshaft in clockwise direction until con-
verter bolts (1) are accessible. Then remove bolts
(1) one at a time. Rotate crankshaft with socket
wrench on dampener bolt.
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AUTOMATIC TRANSMISSION 42RLE - SERVICE INFORMATION
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