Jeep Wrangler TJ. Manual — part 506
HOLDING CLUTCHES
DESCRIPTION
Two hydraulically applied multi-disc clutches are
used to hold planetary geartrain components station-
ary while the input clutches drive others. The 2/4 (2)
and Low/Reverse (3) clutches are considered holding
clutches and are contained at the rear of the trans-
mission case (Fig. 155).
OPERATION
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.
2/4 CLUTCH
The 2/4 clutch is hydraulically applied in second
and fourth gears by pressurized fluid against the 2/4
clutch piston. When the 2/4 clutch is applied, the
front sun gear assembly is held or grounded to the
transmission case.
LOW/REVERSE CLUTCH
The Low/Reverse clutch is hydraulically applied in
park, reverse, neutral, and first gears by pressurized
fluid against the Low/Reverse clutch piston. When
the Low/Reverse clutch is applied, the front planet
carrier/rear annulus assembly is held or grounded to
the transmission case.
INPUT CLUTCH ASSEMBLY
DISASSEMBLY
(1) Mount input clutch assembly to Input Clutch
Pressure Fixture (Tool 8391).
(2) Tap down (2) reverse clutch reaction plate (4)
to release pressure from snap ring (Fig. 156).
Fig. 155 2/4 and Low/Reverse Clutches
1 - FRONT PLANET CARRIER/REAR ANNULUS
2 - 2/4 CLUTCH
3 - L/R CLUTCH
4 - REAR PLANET CARRIER/FRONT ANNULUS
5 - REAR SUN GEAR
6 - FRONT SUN GEAR ASSEMBLY
Fig. 156 Tapping Reaction Plate
1 - #4 THRUST PLATE (SELECT)
2 - TAP DOWN REVERSE CLUTCH REACTION PLATE TO
REMOVE OR INSTALL SNAP RING
3 - INPUT CLUTCH RETAINER
4 - REVERSE CLUTCH REACTION PLATE
Fig. 157 Reverse Clutch Snap Ring
1 - REACTION PLATE
2 - SCREWDRIVER
3 - REVERSE CLUTCH SNAP RING (SELECT)
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AUTOMATIC TRANSMISSION - 42RLE
TJ
(3) Remove reverse clutch snap ring (3) (Fig. 157).
(4) Pry up reverse clutch reaction plate (1) (Fig.
158).
(5) Remove reverse clutch reaction plate (1) (Fig.
159).
NOTE: Tag reverse clutch pack for reassembly iden-
tification.
(6) Remove the reverse clutch pack (two fibers/one
steel) (1, 2) (Fig. 160).
(7) Remove the OD/Reverse reaction plate (1) snap
ring (3) (Fig. 161).
Fig. 158 Pry Reverse Clutch Reaction Plate
1 - REVERSE CLUTCH REACTION PLATE
2 - SCREWDRIVER
3 - SCREWDRIVER
Fig. 159 Reverse Clutch Reaction Plate
1 - REVERSE CLUTCH REACTION PLATE (INSTALL FLAT SIDE
DOWN)
Fig. 160 Reverse Clutch Pack
1 - REVERSE CLUTCH PLATE
2 - REVERSE CLUTCH DISC
Fig. 161 OD/Reverse Pressure Plate Snap Ring
1 - OD/REVERSE PRESSURE PLATE
2 - SCREWDRIVER
3 - OD/REVERSE PRESSURE PLATE SNAP RING
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AUTOMATIC TRANSMISSION - 42RLE
21 - 115
INPUT CLUTCH ASSEMBLY (Continued)
(8) Remove OD/Reverse pressure plate (1) (Fig.
162).
(9) Remove OD/Reverse reaction plate wave snap
ring (2) (Fig. 163).
(10) Remove OD shaft/hub and OD clutch pack (1)
(Fig. 164).
Fig. 162 OD/Reverse Reaction Plate
1 - OD/REVERSE PRESSURE PLATE (STEP SIDE DOWN)
2 - (STEP SIDE DOWN)
Fig. 163 Waved Snap Ring
1 - OVERDRIVE SHAFT ASSEMBLY
2 - OD/REVERSE CLUTCH WAVED SNAP RING
3 - SCREWDRIVER
Fig. 164 Remove OD Clutch Pack
1 - OVERDRIVE SHAFT ASSEMBLY AND OD CLUTCH PACK
2 - #3 THRUST PLATE
3 - #3 THRUST WASHER
4 - UNDERDRIVE SHAFT ASSEMBLY
Fig. 165 Overdrive Clutch Pack
1 - OVERDRIVE CLUTCH PLATE
2 - OVERDRIVE SHAFT ASSEMBLY
3 - OVERDRIVE CLUTCH DISC
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AUTOMATIC TRANSMISSION - 42RLE
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INPUT CLUTCH ASSEMBLY (Continued)
NOTE: Tag overdrive clutch pack for reassembly
identification.
(11) Remove the overdrive clutch (1, 3) from the
overdrive hub/shaft (2) (Fig. 165).
(12) Remove and inspect number 3 and 4 thrust
plates (1, 3) (Fig. 166).
(13) Remove the underdrive shaft assembly (2)
(Fig. 167).
(14) Remove the number 2 needle bearing (1) (Fig.
168).
(15) Remove the OD/UD reaction plate tapered
snap ring (1) (Fig. 169).
Fig. 166 #3 and #4 Thrust Washers
1 - #3 THRUST PLATE (3 TABS)
2 - OD SHAFT ASSEMBLY
3 - #4 THRUST PLATE (3 SLOTS)
Fig. 167 Underdrive Shaft Assembly
1 - #3 THRUST WASHER (5 TABS)
2 - UNDERDRIVE SHAFT ASSEMBLY
Fig. 168 No 2 Needle Bearing
1 - #2 NEEDLE BEARING (NOTE 3 TABS)
Fig. 169 Tapered Snap Ring
1 - OVERDRIVE/UNDERDRIVE CLUTCHES REACTION PLATE
TAPERED SNAP RING
2 - SCREWDRIVER (DO NOT SCRATCH REACTION PLATE)
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AUTOMATIC TRANSMISSION - 42RLE
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INPUT CLUTCH ASSEMBLY (Continued)
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