Jeep Grand Cherokee WK. Manual — part 1508
2. Assemble piston guide (4) and B3 piston (8) in the correct position. Verify that the missing tooth in the B3 pis-
ton/B2 outer disc carrier (8) is aligned with the centerline of the two threaded holes in the B2 and B3 piston
guide (4).
3. Insert B2 piston (10) in B3 piston (8).
Holding Clutch B2
1 - SNAP-RING
9 - B2 PISTON SEALING RING
2 - MULTIPLE DISC PACK
10 - B2 PISTON
3 - DISC SPRING
11 - PISTON GUIDE SEALING RING
4 - B2 AND B3 PISTON GUIDE
12 - PISTON GUIDE SEALING RING
5 - O-RING
13 - PISTON GUIDE RING
6 - B3 PISTON SEALING RING
14 - PISTON BACK PRESSURE DISC SPRING
7 - B3 PISTON SEALING RING
15 - SPRING PLATE
8 - B3 PISTON/B2 OUTER DISC CARRIER
16 - SNAP-RING
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4. Insert piston guide ring (2). The valve (1) in the pis-
ton guide ring must be on top.
5. Insert disc spring (14) and spring plate (15). Insert disc spring with the curvature towards the spring plate
6. Place Multi-use Spring Compressor 8900 on the disc spring (14) and compress the spring until the groove for the
snap-ring is exposed.
7. Insert snap-ring (16).
NOTE: Pay attention to sequence of discs. If the original clutch discs are reused, be sure to return the disc
identified on disassembly as belonging on top of the disc spring (3) to its original location. Place new fric-
tion multiple-discs in ATF fluid for one hour before installing.
8. Insert disc spring (3) and multiple-disc pack (2) in the B2 outer multiple-disc carrier.
9. Insert snap-ring (1).
NOTE: During the measurement the snap-ring (8)
must contact the upper bearing surface of the
groove in the outer multiple-disc carrier.
10. Measure the B2 clutch pack clearance by mount-
ing the Pressing Tool 8901 (1) on outer multiple
disc.
11. Using a lever press, compress the pressing tool
as far as the stop (then the marking ring is still
visible, see small arrow).
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12. Using a feeler gauge, determine the play
9
L
9
at
three points between the snap-ring (8) and outer
multiple-disc (7).
13. The correct clutch clearance is 1.9-2.3 mm
(0.075-0.091 in.) for the four friction disc versions
and 2.0-2.4 mm (0.079-0.095 in.) for the five disc
versions.
14. Adjust with snap-ring (8), if necessary. Snap-rings
are available in thicknesses of 2.9 mm (0.114 in.),
3.2 mm (0.126 in.), 3.5 mm (0.138 in.), 3.8 mm
(0.150 in.), and 4.1 mm (0.162 in.).
INPUT SPEED SENSORS
DESCRIPTION
The input speed sensors (6, 8) are fixed to the shell of
the control unit via contact blades. The speed sensors
are pressed against the transmission housing (2) by a
spring (7) which is held against the valve housing of
the shift plate (5). This ensures a defined distance
between the speed sensors and the exciter ring (4).
1 - B2 OUTER DISC CARRIER
2 - FRICTION DISCS
3 - DISC SPRING
4 - B2 PISTON
5 - OUTER MULTIPLE DISC - 1.8 MM (0.071 IN.)
6 - OUTER MULTIPLE DISC - 1.8 MM (0.071 IN.)
7 - OUTER MULTIPLE DISC - 6.5 MM (0.256 IN.)
8 - SNAP-RING
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OPERATION
Signals from the input speed sensors (6, 8) are
recorded in the transmission control module (TCM)
together with the wheel and engine speeds and other
information and are processed into an input signal for
electronic control.
Input speed sensor N2 (6) records the speed of the
front sun gear via the externally toothed disc carrier of
the multiple-disc clutch K1 (10) and input speed sen-
sor N3 (8) records the speed of the front planet carrier
via the internally toothed disc carrier of multiple-disc
clutch K1 (3).
PUMP-OIL
DESCRIPTION
The oil pump (2) (crescent-type pump) is installed in
the bellhousing behind the torque converter and is
driven by the drive flange of the torque converter. The
pump creates the oil pressure required for the hydrau-
lic procedures.
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