Dodge Durango (HB). Manual — part 1214
The 2/4 accumulator (5) is located in the valve body. It
is retained by a cover and retaining screws.
OPERATION
The function of an accumulator is to cushion the application of a frictional clutch element. When pressurized fluid is
applied to a clutch circuit, the application force is dampened by fluid collecting in the respective accumulator cham-
ber against the piston and springs. The intended result is a smooth, firm clutch application.
SEAL-ADAPTER HOUSING
REMOVAL
1. Remove the transfer case (Refer to 21 - TRANSMISSION/TRANSFER CASE - REMOVAL).
2. Using a screw mounted in a slide hammer, remove the adapter housing seal.
INSTALLATION
1. Install a new adapter housing seal with Tool Handle C-4171 and Installer C-3860-A.
2. Install the transfer case (Refer to 21 - TRANSMISSION/TRANSFER CASE - INSTALLATION).
BEARINGS
ADJUSTMENTS
BEARING ADJUSTMENT PROCEDURES
Take extreme care when removing and installing bearing cups and cones. Use only an arbor press for installa-
tion, as a hammer may not properly align the bearing cup or cone. Burrs or nicks on the bearing seat will give a
false end play reading, while gauging for proper shims. Improperly seated bearing cup and cones are subject to
low-mileage failure.
Bearing cups and cones should be replaced if they show signs of pitting or heat distress.
If distress is seen on either the cup or bearing rollers, both cup and cone must be replaced.
NOTE: Bearing drag torque specifications must be maintained to avoid premature bearing failures.
Used (original) bearing may lose up to 50 percent of the original drag torque after break-in.
NOTE: All bearing adjustments must be made with no other component interference or gear inter-mesh.
Oil all bearings before checking turning torque.
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AUTOMATIC TRANSMISSION 42RLE - SERVICE INFORMATION
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MECHANISM-BRAKE TRANSMISSION SHIFT INTERLOCK
DESCRIPTION
The Brake Transmission Shifter Interlock (BTSI), is a
solenoid operated system. It consists of a solenoid
permanently mounted on the gearshift cable.
OPERATION
The system locks the shifter into the PARK position. The interlock system is engaged whenever the ignition switch
is in the LOCK or ACCESSORY position. An additional electrically activated feature will prevent shifting out of the
PARK position unless the brake pedal is depressed approximately one-half an inch. A magnetic holding device in
line with the park lock cable is energized when the ignition is in the RUN position. When the key is in the RUN
position and the brake pedal is depressed, the shifter is unlocked and will move into any position. The interlock
system also prevents the ignition switch from being turned to the LOCK or ACCESSORY position, unless the shifter
is fully locked into the PARK position.
DIAGNOSIS AND TESTING - BRAKE TRANSMISSION SHIFT INTERLOCK
1. Verify that the key can only be removed in the PARK position.
2. When the shift lever is in PARK And the shift handle pushbutton is in the “OUT” position, the ignition key cylinder
should rotate freely from OFF to LOCK. When the shifter is in any other gear or neutral position, the ignition key
cylinder should not rotate to the LOCK position.
3. Shifting out of PARK should not be possible when the ignition key cylinder is in the OFF position.
4. Shifting out of PARK should not be possible while applying normal pushbutton force and ignition key cylinder is
in the RUN or START positions unless the foot brake pedal is depressed approximately 1/2 inch (12mm).
5. Shifting out of PARK should not be possible when the ignition key cylinder is in the ACCESSORY or LOCK
positions.
6. Shifting between any gears, NEUTRAL or into PARK may be done without depressing foot brake pedal with
ignition switch in RUN or START positions.
ADJUSTMENTS - BRAKE TRANSMISSION SHIFT INTERLOCK
Correct cable adjustment is important to proper interlock operation. The gearshift cable must be correctly adjusted
in order to shift out of PARK.
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AUTOMATIC TRANSMISSION 42RLE - SERVICE INFORMATION
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ADJUSTMENT PROCEDURE
1. Remove the steering column trim as necessary for
access to the brake transmission shift interlock.
2. Shift the transmission into the PARK position.
3. Pull upward on both the BTSI lock tab (4) and the
gearshift cable lock tab (3).
4. Verify that the shift lever is in the PARK position.
5. Verify positive engagement of the transmission
park lock by attempting to rotate the propeller
shaft. The shaft will not rotate when the park lock is
engaged.
6. Turn ignition switch to LOCK position. Be sure
ignition key cylinder is in the LOCK position.
Cable will not adjust correctly in any other
position.
7. Ensure that the cable is free to self-adjust by push-
ing cable rearward and releasing.
8. Push the gearshift cable lock tab (3) down until it snaps in place.
9. Locate the BTSI alignment hole in the bottom of the BTSI mechanism between the BTSI lock tab and the BTSI
connector.
10. Move the BTSI assembly up or down on the gearshift cable until an appropriate size drill bit can be inserted into
the alignment hole and through the assembly.
11. Push the BTSI lock tab (4) down until it snaps into place and remove the drill bit.
12. Install any steering column trim previously removed.
BTSI FUNCTION CHECK
1. Verify removal of ignition key allowed in PARK position only.
2. When the shift lever is in PARK, the ignition key cylinder should rotate freely from off to lock. When the shifter
is in any other position, the ignition key should not rotate from off to lock.
3. Shifting out of PARK should be possible when the ignition key cylinder is in the off position.
4. Shifting out of PARK should not be possible while applying normal force, and ignition key cylinder is in the run
or start positions, unless the foot brake pedal is depressed approximately 1/2 inch (12mm).
5. Shifting out of PARK should not be possible when the ignition key cylinder is in the accessory or lock position.
6. Shifting between any gear and NEUTRAL, or PARK, may be done without depressing foot brake with ignition
switch in run or start positions.
7. Engine starts must be possible with shifter lever in PARK or NEUTRAL positions only. Engine starts must not be
possible in any position other than PARK or NEUTRAL.
8. With shifter lever in the:
•
PARK position - Apply upward force on the shift arm and remove pressure. Engine starts must be possible.
•
PARK position - Apply downward force on the shift arm and remove pressure. Engine starts must be possible.
•
NEUTRAL position - Normal position. Engine starts must be possible.
•
NEUTRAL position - Engine running and brakes applied, apply upward force on the shift arm. Transmission
shall not be able to shift from neutral to reverse.
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AUTOMATIC TRANSMISSION 42RLE - SERVICE INFORMATION
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CLUTCHES-DRIVING
DESCRIPTION
Three hydraulically applied input clutches are used to
drive planetary components. The underdrive (2), over-
drive (3), and reverse (4) clutches are considered
input/driving clutches and are contained within the
input clutch assembly. The input clutch assembly also
contains:
•
Input shaft
•
Input hub
•
Clutch retainer
•
Underdrive piston
•
Overdrive/reverse piston
•
Overdrive hub
•
Underdrive hub
OPERATION
The three input clutches are responsible for driving different components of the planetary geartrain.
NOTE: (Refer to 21 - TRANSMISSION/AUTOMATIC - 42RLE - DIAGNOSIS AND TESTING) for a collective view
of which clutch elements are applied at each position of the selector lever.
UNDERDRIVE CLUTCH
The underdrive clutch is hydraulically applied in first, second, and third (direct) gears by pressurized fluid against the
underdrive piston. When the underdrive clutch is applied, the underdrive hub drives the rear sun gear.
OVERDRIVE CLUTCH
The overdrive clutch is hydraulically applied in third (direct) and overdrive gears by pressurized fluid against the
overdrive/reverse piston. When the overdrive clutch is applied, the overdrive hub drives the front planet carrier.
REVERSE CLUTCH
The reverse clutch is hydraulically applied in reverse gear only by pressurized fluid against the overdrive/reverse
piston. When the reverse clutch is applied, the front sun gear assembly is driven.
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