2003 JEEP GRAND CHEROKEE piston

Inspect all the valve and plug bores in the valve
body. Use a penlight to view the bore interiors.
Replace the valve body if any bores are distorted or
scored. Inspect all of the valve body springs. The
springs must be free of distortion, warpage or broken
coils.
Trial fit each valve and plug in its bore to check
freedom of operation. When clean and dry, the valves
and plugs should drop freely into the bores.
Valve body bores do not change dimensionally with
use. If the valve body functioned correctly when new,
it will continue to operate properly after cleaning and
inspection. It should not be necessary to replace a
valve body assembly unless it is damaged in han-
dling.
Inspect all the accumulator bores in the valve body.
Use a penlight to view the bore interiors. Replace the
valve body if any bores are distorted or scored.Inspect all of the accumulator springs. The springs
must be free of distortion, warpage or broken coils.
Inspect all the fluid seals on the valve body (Fig.
133). Replace any seals that are cracked, distorted, or
damaged in any way. These seals pass fluid pressure
directly to the clutches. Any pressure leak at these
points, may cause transmission performance prob-
lems.
ASSEMBLY
(1) Lubricate valves, springs, and the housing
valve bores with clean transmission fluid.
(2) Install solenoid switch valve, manual valve,
and the low/reverse switch valve into the valve body.
(3) Install the retainers to hold each valve into the
valve body.
(4) Install the valve body check balls into their
proper locations.
(5) Position the transfer plate onto the valve body.
(6) Install the screws to hold the transfer plate to
the valve body. Tighten the screws to 5.6 N´m (50 in.
lbs.).
(7) Install the accumulator pistons and springs
into the valve body in the location from which they
were removed. Note that all accumulators except the
overdrive have two springs. The overdrive accumula-
tor piston has only one spring.
Fig. 132 Valve Body Components
1 - SOLENOID SWITCH VALVE
2 - MANUAL VALVE
3 - LOW REVERSE SWITCH VALVE
4 - LOW REVERSE ACCUMULATOR
5 - 2ND CLUTCH ACCUMULATOR
6 - UNDERDRIVE ACCUMULATOR
7 - OVERDRIVE ACCUMULATOR
8 - 4TH CLUTCH ACCUMULATOR
9 - CHECK BALLS (7)
Fig. 133 Valve Body Seals
1 - UNDERDRIVE ACCUMULATOR (2 SPRINGS)
2 - 4TH CLUTCH ACCUMULATOR (2 SPRINGS)
3 - 2ND CLUTCH ACCUMULATOR (2 SPRINGS)
4 - LOW REVERSE ACCUMULATOR (2 SPRINGS)
5 - LOW/REVERSE PASSAGE SEAL
6 - 2ND CLUTCH PASSAGE SEAL
7 - 4TH CLUTCH PASSAGE SEAL
8 - OVERDRIVE ACCUMULATOR (1 SPRING)
21 - 278 AUTOMATIC TRANSMISSION - 545RFEWJ
VALVE BODY (Continued)

DECKLID/HATCH/LIFTGATE/TAILGATE
TABLE OF CONTENTS
page page
EXTERIOR HANDLE
REMOVAL.............................5
INSTALLATION..........................5
FLIP-UP GLASS
REMOVAL.............................5
INSTALLATION..........................6
FLIP-UP GLASS LATCH
REMOVAL.............................6
INSTALLATION..........................6
FLIP-UP GLASS LATCH STRIKER
REMOVAL.............................7
INSTALLATION..........................7
FLIP-UP GLASS SWITCH
REMOVAL.............................7
INSTALLATION..........................7
HINGE
REMOVAL.............................7
INSTALLATION..........................7
LATCH
REMOVAL.............................8
INSTALLATION..........................8LATCH STRIKER
REMOVAL.............................8
INSTALLATION..........................8
LIFTGATE
REMOVAL.............................9
INSTALLATION..........................9
ADJUSTMENTS
LIFTGATE ADJUSTMENT................9
TRIM PANEL
REMOVAL
REMOVAL - LIFTGATE TRIM PANEL........9
REMOVAL - LOWER LIFTGATE OPENING
TRIM PANEL.........................10
INSTALLATION
INSTALLATION - LIFTGATE TRIM PANEL . . . 10
INSTALLATION - LOWER LIFTGATE
OPENING TRIM PANEL.................10
LIFTGATE INSULATOR
REMOVAL.............................10
INSTALLATION.........................10
EXTERIOR HANDLE
REMOVAL
(1) Remove the liftgate trim panel refer to (Refer
to 23 - BODY/DECKLID/HATCH/LIFTGATE/TAIL-
GATE/TRIM PANEL - REMOVAL).
(2) Remove the latch, outside handle linkage, and
power lock connector.
(3) Remove the fasteners attaching the outside
handle to the liftgate.
(4) Remove the outside handle from the liftgate.
INSTALLATION
(1) Position the outside handle on the liftgate.
(2) Install the fasteners attaching outside handle
to liftgate.
(3) Connect outside handle link and power lock
connector.
(4) Install liftgate trim panel, refer to (Refer to 23
- BODY/DECKLID/HATCH/LIFTGATE/TAILGATE/
TRIM PANEL - INSTALLATION).
FLIP-UP GLASS
REMOVAL
CAUTION: DO NOT DISCONNECT THE PROP ROD
CYLINDERS WITH THE LIFTGATE FLIP UP GLASS
CLOSED. THE PROP ROD PISTONS ARE OPER-
ATED BY HIGH PRESSURE GAS. THIS PRESSURE
COULD CAUSE DAMAGE AND/OR PERSONAL
INJURY IF THEY ARE REMOVED WHILE THE PIS-
TONS ARE COMPRESSED.
(1) Using a trim stick or other suitable device, sep-
arate the flip up glass hinge cover from the hinge on
the liftgate (Fig. 1).
(2) Open liftgate flip up glass. Support the glass
for ease of repair.
(3) Using a small flat blade or equivalent tool, gen-
tly pry open the locking caps on the end of the prop
rods.
(4) Remove prop rod cylinders from ball studs.
(5) Lower the flip up glass.
(6) Remove hinge fasteners from liftgate.
(7) Separate flip up glass from liftgate.
WJDECKLID/HATCH/LIFTGATE/TAILGATE 23 - 5

LIFTGATE
REMOVAL
CAUTION: DO NOT DISCONNECT THE SUPPORT ROD
CYLINDERS WITH THE LIFTGATE CLOSED. THE SUP-
PORT ROD PISTONS ARE OPERATED BY HIGH PRES-
SURE GAS. THIS PRESSURE COULD CAUSE DAMAGE
AND /OR PERSONAL INJURY IF THEY ARE REMOVED
WHILE THE PISTONS ARE COMPRESSED.
(1) Open the liftgate. Support the liftgate for ease
of repair.
(2) Remove the liftgate trim panel.
(3) Remove the prop rods from the liftgate.
(4) Unplug the wire harnesses and disconnect the
washer hose.
(5) Mark the hinge location with a wax pencil or
other suitable device (Fig. 5).
(6) Remove the hinge screws and remove liftgate
from vehicle.
INSTALLATION
(1) Position the liftgate on the vehicle and align
the witness marks.
(2) Install the hinge screws at liftgate. Tighten
hinge screws to 28N´m (21ft. lbs.).
(3) Connect the wire harnesses and the washer
hose.
(4) Install the trim panel.
(5) Install the prop rods.
(6) Close the liftgate and check for proper latching
and alignment.
ADJUSTMENTS
LIFTGATE ADJUSTMENT
The position of the liftgate can be adjusted upward
or downward by the use of slots in the hinge. An
inward or outward adjustment is achieved by use of
slots in the body. If an inward or outward adjustment
is needed, use 3MŸ Fast and Firm or equivalent on
the hinge to body mating surface as a sealant.
TRIM PANEL
REMOVAL
REMOVAL - LIFTGATE TRIM PANEL
NOTE: The liftgate trim panel is attached with
screws and spring clips.
(1) Raise the liftgate.
(2) Remove the screws securing the liftgate trim
panel to the liftgate (Fig. 6).
(3) Disconnect the rear window defroster wires.
(4) Using a trim stick, or other suitable tool, pry
the liftgate trim panel off the liftgate.
Fig. 5 Liftgate
1 - HINGE
2 - LIFTGATE
Fig. 6 Liftgate Trim Panel
1 - LIFTGATE
2 - LIFTGATE TRIM PANEL
WJDECKLID/HATCH/LIFTGATE/TAILGATE 23 - 9