1995 JEEP XJ Service And Repair Manual

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Page 1865 of 2158

JEEP XJ 1995 Service And Repair Manual (7) Clean sealing surfaces of rear case front case,
retainer and extension. Use 3M all puspose cleaner
or equivalent product.
(8) Apply 3 mm (1/8 in.) wide bead of Mopar gas-
ket maker, silicone adhes

Page 1866 of 2158

JEEP XJ 1995 Service And Repair Manual (19) Apply 3 mm (1/8 in.) wide bead of Mopar gas-
ket maker, silicone adhesive sealer, or Loctite 518 to
mounting surface of extension housing.(20) Align and install extension on retainer. Then
instal

Page 1867 of 2158

JEEP XJ 1995 Service And Repair Manual NP231 TRANSFER CASE
JNP231 TRANSFER CASE 21 - 305

Page 1868 of 2158

JEEP XJ 1995 Service And Repair Manual LEGEND FOR NP231 TRANSFER CASE
21 - 306 NP231 TRANSFER CASEJ

Page 1869 of 2158

JEEP XJ 1995 Service And Repair Manual NP242 TRANSFER CASE
INDEX
page page
General Information....................... 307
Operating Ranges........................ 307
Overhaul Cleaning and Inspection............ 318
Recommended Lubricant/C

NP242 TRANSFER CASE
INDEX
page page
General Information....................... 307
Operating Ranges........................ 307
Overhaul Cleaning and Inspection............ 318
Recommended Lubricant/Capacity/Fill Level..... 307
Shift Lever Installation (XJ)................. 309
Shift Lever Removal (XJ)................... 309
Shift Linkage Adjustment................... 309
Shift Mechanism......................... 307Speedometer Service..................... 309
Transfer Case Assembly................... 319
Transfer Case Changes.................... 307
Transfer Case Disassembly and Overhaul...... 310
Transfer Case Identification................. 307
Transfer Case Installation.................. 309
Transfer Case Removal.................... 309
GENERAL INFORMATION
The NP242 is a full and part-time transfer case
(Fig. 1). It provides full time 2-wheel, or 4-wheel
drive operation. The NP242 is used in XJ models.
A differential in the transfer case is used to control
torque transfer to the front and rear axles. A low
range gear provides increased low speed torque capa-
bility for off road operation. The low range provides a
2.72:1 reduction ratio.
OPERATING RANGES
NP242 operating ranges are 2WD (2-wheel drive),
4x4 part-time, 4x4 full time, and 4 Lo.
The 2WD and 4x4 full time ranges can be used at
any time and on any road surface.
The 4x4 part-time and 4 Lo ranges are for off road use
only. The only time these ranges can be used on hard sur-
face roads, is when the surface is covered with snow and
ice.
SHIFT MECHANISM
Transfer case 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. Range po-
sitions are marked on the shift knob or shifter bezel plate.
TRANSFER CASE IDENTIFICATION
A circular I.D. tag is attached to the rear case of
each NP242 transfer case (Fig. 2). The tag provides
the transfer case model number, assembly number,
serial number and low range ratio.
The transfer case serial number also represents the
date of build. For example, a serial number of
1-10-94 would represent January 10, 1994.
RECOMMENDED LUBRICANT/CAPACITY/FILL LEVEL
Mopar Dexron II is the recommended fluid for the
NP242 transfer case. Approximate dry fill lubricant
capacity is 1.4 liters (1.48 qts.).
Correct transfer case lubricant level is to the bot-
tom edge of the fill plug hole.
TRANSFER CASE CHANGES
The only service change for 1995 involves the front
output shaft seal which is new. The new seal does
not have the flange used on prior seals and changes
seal installation. The new seal must be seated below
the edge of the seal bore in the front case. Refer to
the overhaul information for seal installation.
Fig. 1 NP242 Transfer Case
Fig. 2 Transfer Case I.D. Tag
JNP242 TRANSFER CASE 21 - 307

Page 1870 of 2158

JEEP XJ 1995 Service And Repair Manual NP242 SERVICE DIAGNOSIS
21 - 308 NP242 TRANSFER CASEJ

Page 1871 of 2158

JEEP XJ 1995 Service And Repair Manual SHIFT LINKAGE ADJUSTMENT
(1) Shift transfer case into 4L position.
(2) Raise vehicle.
(3) Loosen lock bolt on adjusting trunnion (Fig. 3).
4) Verify that linkage rod slides freely in trunnion.
Clean r

SHIFT LINKAGE ADJUSTMENT
(1) Shift transfer case into 4L position.
(2) Raise vehicle.
(3) Loosen lock bolt on adjusting trunnion (Fig. 3).
4) Verify that linkage rod slides freely in trunnion.
Clean rod and apply spray lube if necessary.
(5) Verify that transfer case range lever is fully en-
gaged in 4L position.
(6) Tighten adjusting trunnion lock bolt.
(7) Lower vehicle.
(8) Verify proper shift operation.
SHIFT LEVER REMOVAL (XJ)
(1) Shift transfer case into 4L.
(2) Raise vehicle.
(3) Loosen adjusting trunnion locknut and slide
shift rod out of trunnion (Fig. 4). If rod lacks enough
travel to come out of trunnion, push trunnion out of
torque shaft.
(4) Lower vehicle.
(5) Remove console. Refer to park brake section in
Group 5 for procedures.
(6) Remove screws attaching lever assembly to floor-
pan and remove assembly and shift rod (if left attached).
SHIFT LEVER INSTALLATION (XJ)
(1) If shift rod was not removed from lever assem-
bly, work rod down through floorpan opening. Then
position lever assembly on floorpan and install as-
sembly attaching screws.
(2) Install console.
(3) Raise vehicle.
(4) Connect trunnion to torque shaft arm. Or, slide
shift rod into trunnion on range lever.
(5) Tighten trunnion lock bolt.
(6) Lower vehicle.
(7) Lower vehicle.
(8) Remove shift lever spacer and install bezel.
SPEEDOMETER SERVICE
Speedometer service procedures are covered in the
automatic transmission sections within Group 21.
Refer to these sections when necessary.
TRANSFER CASE REMOVAL
(1) Shift transfer case into Neutral.
(2) Raise vehicle.
(3) Drain transfer case lubricant.
(4) Mark front and rear propeller shaft yokes for
alignment reference.
(5) Place support stand under transmission.
(6) Remove rear crossmember.
(7) Disconnect front/rear propeller shafts at trans-
fer case.
(8) Disconnect vehicle speed sensor wires and re-
move sensor and adapter assembly if necessary.
(9) Disconnect shift rod from transfer case range
lever.
(10) Disconnect transfer case vent hoses and elec-
trical switch connector.
(11) Support transfer case with transmission jack.
(12) Remove bolts attaching transfer case to trans-
mission.
(13) Secure transfer case to jack with chains.
(14) Pull transfer case and jack rearward to disen-
gage transfer case.
(15) Remove transfer case from under vehicle.
(16) If transfer case was removed for overhaul, re-
move damper from rear retainer.
TRANSFER CASE INSTALLATION
(1) Install damper on transfer case rear retainer, if
equipped (Fig. 4). Tighten damper attaching nuts to
54 Nzm (40 ft. lbs.) torque.
(2) Mount transfer case on transmission jack. Se-
cure transfer case to jack with safety chains.
(3) Position transfer case under vehicle.
(4) Align transfer case and transmission shafts and
slide transfer case onto transmission.
(5) Install and tighten transfer case attaching nuts
to 35 Nzm (26 ft. lbs.) torque.
Fig. 3 Shift Linkage (XJ)
JNP242 TRANSFER CASE 21 - 309

Page 1872 of 2158

JEEP XJ 1995 Service And Repair Manual (6) Install vehicle speed sensor and adapter, if re-
moved. Then connect vehicle speed sensor wires, vent
hoses and electrical switch connector.
(7) Align and connect propeller shafts. Tighten
shaft U

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