Jeep Grand Cherokee WK. Manual — part 1492
4. Shifting out of PARK should not be possible while applying normal force on the shift lever and ignition key cyl-
inder is in the ACC, ON, 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 LOCK position, regardless of
the brake pedal position.
6. Shifting between any gears, NEUTRAL or into PARK may be done without depressing foot brake pedal with
ignition switch in ACC, ON, or START positions.
7. The floor shifter lever and gate positions should be in alignment with all transmission detent positions.
8. Engine starts must be possible with shifter lever in PARK or NEUTRAL gate positions only. Engine starts must
not be possible in any other gate positions other than PARK or NEUTRAL.
9. With the shifter lever handle in the:
•
PARK position- apply forward force on center of handle and remove pressure. Engine start must be possible.
•
PARK position- apply rearward force on center of handle and remove pressure. Engine start must be possible.
•
NEUTRAL position- engine start must be possible.
•
NEUTRAL position, engine running and brakes applied- Apply forward force on center of shift handle. Trans-
mission should not be able to shift into REVERSE detent.
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CLUTCHES-INPUT
DESCRIPTION
Three multi-plate input clutches (1, 2, 5), the front, middle and rear multi-plate clutches K1 (1), K2 (2), and K3 (5),
are located in the planetary gear sets in the transmission housing.
A multi-plate input clutch consists of a number of internally toothed discs (4) on an internally toothed disc carrier and
externally toothed discs (3) on an externally toothed disc carrier.
Input Clutches
1 - K1 CLUTCH
12 - CENTER PLANETARY GEARSET SUN GEAR
2 - K2 CLUTCH
13 - K2 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
3 - EXTERNALLY TOOTHED DISC
14 - K2 CLUTCH PISTON
4 - INTERNALLY TOOTHED DISC
15 - FRONT PLANETARY GEARSET PLANETARY CARRIER
5 - K3 CLUTCH
16 - FRONT PLANETARY GEARSET ANNULUS GEAR
6 - K3 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
17 - FRONT PLANETARY GEARSET SUN GEAR
7 - K3 CLUTCH PISTON
18 - K1 CLUTCH INTERNALLY TOOTHED DISC CARRIER
8 - K3 CLUTCH INTERNALLY TOOTHED DISC CARRIER
19 - K1 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
9 - REAR PLANETARY GEARSET SUN GEAR
20 - K1 CLUTCH PISTON
10 - CENTER PLANETARY GEARSET PLANETARY CARRIER
21 - DRIVE SHAFT
11 - CENTER PLANETARY GEARSET ANNULUS GEAR
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OPERATION
The input clutches produce a non-positive locking connection between two elements of a planetary gear set or
between one element from each of two planetary gear sets in order to transmit the drive torque.
If the piston (20) on multi-plate clutch K1 (1) is subjected to oil pressure, it presses the internal and external discs
of the disc set together. The sun gear (17) is locked with the planetary carrier (15) via the externally toothed disc
carrier (19) and the internally toothed disc carrier (18). The front planetary gear set is thus locked and turns as a
closed unit.
If the multi-plate clutch K2 (2) is actuated via the piston (14), the piston compresses the disc set. The annulus gear
(16) of the front planetary gear set is locked with the annulus gear (11) of the center planetary gear set via the
externally toothed disc carrier (13) and the center planetary carrier (10) on which the internally toothed discs are
seated. Annulus gear (16) and annulus gear (11) turn at the same speed as the input shaft (21)
If the multi-plate clutch K3 (5) is actuated via the piston (7), the piston compresses the disc set. The sun gear (12)
of the center planetary gear set is locked with the sun gear (9) of the rear planetary gear set via the externally
toothed disc carrier (6) and the internally toothed disc carrier (8). Sun gear (12) and sun gear (9) turn at the same
speed.
Input Clutches
1 - K1 CLUTCH
12 - CENTER PLANETARY GEARSET SUN GEAR
2 - K2 CLUTCH
13 - K2 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
3 - EXTERNALLY TOOTHED DISC
14 - K2 CLUTCH PISTON
4 - INTERNALLY TOOTHED DISC
15 - FRONT PLANETARY GEARSET PLANETARY CARRIER
5 - K3 CLUTCH
16 - FRONT PLANETARY GEARSET ANNULUS GEAR
6 - K3 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
17 - FRONT PLANETARY GEARSET SUN GEAR
7 - K3 CLUTCH PISTON
18 - K1 CLUTCH INTERNALLY TOOTHED DISC CARRIER
8 - K3 CLUTCH INTERNALLY TOOTHED DISC CARRIER
19 - K1 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
9 - REAR PLANETARY GEARSET SUN GEAR
20 - K1 CLUTCH PISTON
10 - CENTER PLANETARY GEARSET PLANETARY CARRIER
21 - DRIVE SHAFT
11 - CENTER PLANETARY GEARSET ANNULUS GEAR
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K1-INPUT CLUTCH
DISASSEMBLY
1. Remove snap-ring (11) from outer multiple-disc carrier (6).
2. Take multiple-disc pack (12) out of outer multiple-disc carrier (6). Note which clutch disc is removed just prior to
the spring plate (8) for re-assembly. If the clutch discs are re-used, this disc must be returned to its original
position on top of the spring plate.
Input Clutch K1 Components
1 - K1 OUTER DISC CARRIER
7 - DISC SPRING
2 - FREEWHEELING CLUTCH F1
8 - SPRING PLATE
3 - SNAP-RING
9 - SPRING PLATE SEALING RING
4 - OUTER DISC CARRIER SEALING RING
10 - SNAP-RING
5 - PISTON SEALING RING
11 - SNAP-RING
6 - PISTON
12 - MULTIPLE DISC PACK - REFER TO TEXT FOR CORRECT
ASSEMBLY ORDER
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