Jeep Wrangler TJ. Manual — part 518
(9) Install separator plate (1) to transfer plate (2)
(Fig. 295).
(10) Install the two separator plate-to-transfer
plate screws (2) (Fig. 296).
(11) Install the transfer plate (1) to the valve body
(2) (Fig. 297).
(12) Install the transfer plate-to-valve body screws
(1) (Fig. 298) and torque to 5 N·m (45 in. lbs.).
Fig. 295 Install Separator Plate to Transfer Plate
1 - SEPARATOR PLATE
2 - TRANSFER PLATE
Fig. 296 Install Separator Plate-to-Transfer Plate
Screws
1 - SEPARATOR PLATE
2 - SCREW (2)
3 - TRANSFER PLATE
Fig. 297 Install Transfer Plate to Valve Body
1 - TRANSFER PLATE
2 - VALVE BODY
Fig. 298 Install Transfer Plate-to-Valve Body Screws
1 - SCREW (24)
2 - TRANSFER PLATE
21 - 162
AUTOMATIC TRANSMISSION - 42RLE
TJ
VALVE BODY (Continued)
(13) Install the stiffener plate (1) (Fig. 299).
(14) Install the solenoid/pressure switch assembly
(1) and screws to the transfer plate (Fig. 300) and
torque to 5.5 N·m (50 in. lbs.).
(15) Install the manual shaft/rooster comb (3) and
transmission range sensor (1) to the valve body (Fig.
301).
(16) Install the TRS/manual shaft retaining screw
(1) (Fig. 302) and torque to 5 N·m (45 in. lbs.).
(17) Install manual shaft seal.
Fig. 299 Install Stiffener Plate
1 - STIFFENER PLATE
Fig. 300 Solenoid Retaining Screws
1 - SOLENOID/PRESSURE SWITCH ASSEMBLY
2 - RETAINING SCREWS
Fig. 301 Manual Shaft/Rooster Comb and
Transmission Range Sensor
1 - TRANSMISSION RANGE SENSOR
2 - MANUAL SHAFT
3 - ROOSTER COMB
Fig. 302 Manual Shaft Retaining Screw
1 - SCREW
2 - TRS
TJ
AUTOMATIC TRANSMISSION - 42RLE
21 - 163
VALVE BODY (Continued)
INSTALLATION
(1) Install valve body into position and start bolts
(1). Torque valve body to transmission case bolts (1)
(Fig. 303) to 12 N·m (105 in. lbs.) torque.
(2) Install transmission oil filter (1) (Fig. 304).
NOTE: Before installing the oil pan bolt in the bolt
hole (5) located between the torque converter clutch
on and U/D clutch pressure tap circuits (Fig. 305), it
will be necessary to replentish the sealing patch on
the bolt using Mopar
T
Lock & Seal Adhesive.
(3) Make sure oil pan (1) and case rail are clean
and dry. Install an 1/8” bead of RTV to the transmis-
sion oil pan and install to case. Tighten bolts (2) (Fig.
306) to 20 N·m (14.5 ft. lbs.).
(4) Lower vehicle and connect the TRS connector.
(5) Connect solenoid/pressure switch assembly con-
nector.
(6) Lower vehicle.
(7) Fill
transmission
with
ATF+4,
Automatic
Transmission Fluid. Verify proper fluid level. (Refer
to 21 - TRANSMISSION/AUTOMATIC - 42RLE/
FLUID - STANDARD PROCEDURE)
NOTE: If the valve body has been reconditioned or
replaced, it is necessary to perform the Quick Learn
Procedure. (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL
MODULES/TRANSMISSION
CONTROL
MODULE - STANDARD PROCEDURE)
Fig. 303 Install Valve Body Bolts
1 - BOLTS
Fig. 304 Install Transmission Filter
1 - TRANSMISSION FILTER
Fig. 305 Pan Fastener Location
1 - FRONT DRIVESHAFT
2 - PRESSURE PORTS
3 - TRANSMISSION CASE
4 - TRANSMISSION OIL PAN
5 - SECOND TRANSMISSION OIL PAN BOLT ON LEFT SIDE
6 - FIRST TRANSMISSION OIL PAN BOLT
Fig. 306 Install Transmission Oil Pan Bolts
1 - TRANSMISSION OIL PAN
2 - BOLTS
21 - 164
AUTOMATIC TRANSMISSION - 42RLE
TJ
VALVE BODY (Continued)
TRANSFER CASE - NV231
TABLE OF CONTENTS
page
page
TRANSFER CASE - NV231
. . . . . . . . . . . . . . . . . . . . . . . . 165
. . . . . . . . . . . . . . . . . . . . . . . . . . 166
DIAGNOSIS AND TESTING - TRANSFER
. . . . . . . . . . . . . . . . . . . . . . . 166
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
. . . . . . . . . . . . . . . . . . . . . . . . 167
. . . . . . . . . . . . . . . . . . . . . . . . . . . 175
. . . . . . . . . . . . . . . . . . . . . . . . . 175
. . . . . . . . . . . . . . . . . . . . . . . . . . . 179
. . . . . . . . . . . . . . . . . . . . . . . . 190
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
FLUID
STANDARD PROCEDURE - FLUID DRAIN AND
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
FRONT OUTPUT SHAFT SEAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
. . . . . . . . . . . . . . . . . . . . . . . . 193
REAR OUTPUT SHAFT SEAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
. . . . . . . . . . . . . . . . . . . . . . . . 195
SHIFT LEVER
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
. . . . . . . . . . . . . . . . . . . . . . . . 196
SPEEDOMETER DRIVE ADAPTER
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
. . . . . . . . . . . . . . . . . . . . . . . . 198
VEHICLE SPEED SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . 199
. . . . . . . . . . . . . . . . . . . . . . . . . . 199
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
. . . . . . . . . . . . . . . . . . . . . . . . 200
TRANSFER CASE - NV231
DESCRIPTION
The NV231 is a part-time transfer case with a low
range reduction gear system. The NV231 has three
operating ranges plus a NEUTRAL position. A low
range system provides a reduction ratio for increased
low speed torque capability.
The geartrain is mounted in two aluminum case
halves attached with bolts. The mainshaft front and
rear bearings are mounted in aluminum retainer
housings bolted to the case halves.
OPERATING RANGES
Transfer case operating ranges are:
• 2WD (2-wheel drive)
• 4x4 (4-wheel drive)
• 4 Lo (4-wheel drive low range
The 2WD range is for use on any road surface at
any time.
The 4x4 and 4 Lo ranges are for off road use only.
They are not for use on hard surface roads. The only
exception being when the road surface is wet or slip-
pery or covered by ice and snow.
The low range reduction gear system is operative
in 4 Lo range only. This range is for extra pulling
power in off road situations. Low range reduction
ratio is 2.72:1.
SHIFT MECHANISM
Operating ranges are selected with a floor mounted
shift lever. The shift lever is connected to the trans-
fer case range lever by an adjustable linkage rod. A
straight line shift pattern is used. Range positions
are marked on the shifter bezel cover plate.
TJ
TRANSFER CASE - NV231
21 - 165
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