Page 1489 of 2255

(7) Hold mainshaft Socket 6993 4X2 or Socket
6984 4X4 while installing the fifth gear nut.
(8) Tighten fifth gear nut as much as possible with
Nut Wrench 6743, long handle ratchet, breaker bar
and applicable socket wrench (Fig. 126).
(9) Lock mainshaft gears by shifting all synchro
sleeves into engaged position.
(10) Tighten fifth gear nut with Nut Wrench 6743
and high capacity torque wrench. Tighten nut to 366-380 N´m (270-280 ft. lbs.). Have helper hold trans-
mission steady if necessary.
(11) Torque the fifth gear clamp nut clamping bolt
to 13.5 N´m (10 ft. lbs.).
(12) Unlock the mainshaft gears by shifting all
synchro sleeves out of the engaged position.
EXTENSION/ADAPTER HOUSING
(1) Clean mating surfaces of extension/adapter
housing and gear case with a wax and grease
remover.
(2) Check alignment dowels in gear case and hous-
ing or adapter. Be sure dowels are in position and
seated.
(3) Apply Mopar Silicone Sealer or equivalent to
gear case and housing mating surfaces.
(4) Align and install extension/adapter housing on
gear case (Fig. 127).
(5) Apply Mopar Lock N' Seal or equivalent to
threads of extension/adapter housing bolts.
(6) Install and tighten housing bolts to 54 N´m (40
ft. lbs.).
(7) Install transfer case, if equipped.
(8) Install engine rear support.
(9) Install propeller shaft(s).
(10) Remove transmission support stand and lower
vehicle.
Fig. 125 Fifth Gear Nut
1 - FIFTH GEAR
2 - FIFTH GEAR NUT
Fig. 126 Fifth Gear Nut
1 - WRENCH 6443 OR 6743
2 - FIFTH GEAR NUT
3 - SOCKET 6993 OR 6984
Fig. 127 Installing Extension/Adapter Housing
1 - GEAR CASE
2 - EXTENSION HOUSING
21 - 36 MANUAL - NV4500BR/BE
MANUAL - NV4500 (Continued)
Page 1490 of 2255

INSTALLATION
NOTE: If a new transmission is being installed, use
all components supplied with the new transmission.
For example, if a new shift tower is supplied with
the new transmission, do not re-use the original
shift tower.
(1) Apply light coat of Mopar high temperature
bearing grease or equivalent to contact surfaces of
the following components:
²input shaft splines.
²release bearing slide surface of front retainer.
²release bearing bore.
²release fork.
²release fork ball stud.
²propeller shaft slip yoke.
(2) Apply sealer to threads of bottom PTO cover
bolt and install bolt in case.
(3) Mount transmission on jack and position trans-
mission under vehicle.
(4) Raise transmission until input shaft is centered
in release bearing and clutch disc hub.
(5) Move transmission forward and start input
shaft in release bearing, clutch disc and pilot bush-
ing.
(6) Work transmission forward until seated against
clutch housing. Do not allow transmission to remain
unsupported after input shaft has entered clutch
disc.
(7) Install and tighten transmission-to-clutch hous-
ing bolts to 108 N´m (80 ft. lbs.).
(8) Install transmission mount on transmission or
rear crossmember.
(9) Install rear crossmember.
(10) Remove transmission jack and engine support
fixture.
(11) Position transmission harness wires in clips
on shift cover.
(12) Install clutch slave cylinder and install slave
cylinder shield, if equipped.
(13) Connect speed sensor and backup light switch
wires.
TWO WHEEL DRIVE
(1) Fill transmission with recommended lubricant.
Correct fill level is bottom edge of fill plug hole.
(2) Align and install propeller shaft.
(3) Lower vehicle.
(4) Clean the mating surfaces of shift tower, isola-
tor plate and shift cover with suitable wax and
grease remover.
(5) Apply Mopar Gasket Maker or equivalent to
the sealing surface of the shift cover. Do not over
apply sealant.(6) Install the isolator plate onto the shift cover,
metal side down.
(7) Install the shift tower onto the isolator plate.
No sealant is necessary between the shift tower and
the isolator plate.
(8) Verify that the shift tower, isolator plate and
the shift tower bushings are properly aligned.
(9) Install the bolts to hold the shift tower to the
isolator plate and the shift cover. Tighten the shift
tower bolts to 10.2±11.25 N´m (7.5±8.3 ft. lbs.).
(10) Install the shift lever extension onto the shift
tower and lever assembly.
(11) Install shift boot and bezel.
(12) Connect battery negative cable.
FOUR WHEEL DRIVE
(1) Install transfer case shift mechanism on trans-
mission.
(2) Install transfer case on transmission jack.
Secure transfer case to jack with safety chains.
(3) Raise jack and align transfer case input gear
with transmission mainshaft.
(4) Move transfer case forward and seat it on
adapter.
(5) Install and tighten transfer case attaching
nuts. Tighten nuts to 41-47 N´m (30-35 ft. lbs.) if
case has 3/8 studs or 30-41 N´m (22-30 ft. lbs.) if case
has 5/16 studs.
(6) Install transfer case shift mechanism to side of
transfer case.
(7) Connect transfer case shift lever to range lever
on transfer case.
(8) Align and connect propeller shafts.
(9) Fill transmission with required lubricant.
Check lubricant level in transfer case and add lubri-
cant if necessary.
(10) Install transfer case skid plate, if equipped
and crossmember. Tighten attaching bolts/nuts to 41
N´m (30 ft. lbs.).
(11) Install exhaust system components.
(12) Lower vehicle.
(13) Clean the mating surfaces of shift tower, iso-
lator plate and shift cover with suitable wax and
grease remover.
(14) Apply Mopar Gasket Maker or equivalent to
the sealing surface of the shift cover. Do not over
apply sealant.
(15) Install the isolator plate onto the shift cover,
metal side down.
(16) Install the shift tower onto the isolator plate.
No sealant is necessary between the shift tower and
the isolator plate.
(17) Verify that the shift tower, isolator plate and
the shift tower bushings are properly aligned.
BR/BEMANUAL - NV4500 21 - 37
MANUAL - NV4500 (Continued)
Page 1491 of 2255
(18) Install the bolts to hold the shift tower to the
isolator plate and the shift cover. Tighten the shift
tower bolts to 10.2±11.25 N´m (7.5±8.3 ft. lbs.).
(19) Install the shift lever extension onto the shift
tower and lever assembly.(20) Install shift lever boot and bezel.
(21) Connect battery negative cable.
SPECIFICATIONS
TORQUE SPECIFICATIONS
DESCRIPTION N´m Ft. Lbs. In. Lbs.
Switch, Back-up Lamp 22-34 16-25 -
Countershaft Bearing
Plate Bolts19-26 14-19 170-230
Fifth Gear Nut 366-380 270-280 -
Fifth Gear Nut Clamp Bolt 13.5 10 -
Drain and Fill Plug 34-47 25-35 -
Front Bearing Retainer
Bolts27-34 20-25 235-305
Mainshaft Bearing Plate
Bolts19-26 14-19 170-230
PTO Cover Bolts 27-54 20-40 -
Extension/Adapter
Housing Bolts41-68 30-50 -
Shift Cover Bolt 27-31 20-23 -
SPECIAL TOOLS
Remover Seal C-3985-B
Remover Bushing 6957
Remover, BushingÐ8155
Installer Bushing 6951
21 - 38 MANUAL - NV4500BR/BE
MANUAL - NV4500 (Continued)
Page 1492 of 2255
Installer Bushing 8156
Handle C-4171
Installer Seal C-3972-A
Installer Seal 8154
Installer Seal C-3860-A
Wrench 6443
Wrench 6743
Socket 6441
Socket 6442
Socket 6993
BR/BEMANUAL - NV4500 21 - 39
MANUAL - NV4500 (Continued)
Page 1493 of 2255
Socket 6984
Puller 6444
Jaws 6459
Jaws 6820
Jaws and Insert 6453
Jaws 6447
Jaws 6449
Jaws 6451
Remover 6454
21 - 40 MANUAL - NV4500BR/BE
MANUAL - NV4500 (Continued)
Page 1494 of 2255
Installer 6061
Installer C-4340
Installer C-4040
Installer 6448
Installer C-4308
Installer 6052
Rod Extension 8161
Installer 6446
Jaws 6445
BR/BEMANUAL - NV4500 21 - 41
MANUAL - NV4500 (Continued)
Page 1495 of 2255

ADAPTER HOUSING SEAL -
NV4500
REMOVAL
(1) Raise and support vehicle.
(2) Mark the propeller shafts and yokes for instal-
lation reference and remove the shafts.
(3) Support transmission with a transmission jack.
(4) Remove engine rear support.
(5) Remove transfer case.
(6) Remove adapter housing seal with a pry tool or
slide hammer mounted screw (Fig. 128).
INSTALLATION
(1) Install adapter housing seal with Installer
C-3860-A and Handle C-4171.
(2) Install transfer case.
(3) Install propeller shafts with reference marks
aligned.
(4) Fill transfer case and transmission to proper
level.
(5) Remove support and lower vehicle.
EXTENSION HOUSING SEAL -
NV4500
REMOVAL
(1) Raise and support the vehicle.
(2) Mark the propeller shaft and yoke for installa-
tion reference.
(3) Remove the propeller shaft.
(4) Remove extension housing seal (Fig. 129) using
Remover C-3985-B.(5) On heavy duty 4X2 vehicles, remove extension
housing seal with a pry tool or a slide hammer
mounted screw.
(6) On light duty transmissions, remove the exten-
sion housing bushing with Remover 6957.
(7) On heavy duty transmissions, remove the
extension housing bushing with Remover 8155.
INSTALLATION
(1) Install housing bushing with Handle C-4171
(Fig. 130) and Installer.
²Light Duty - Installer 6951
²Heavy Duty - Installer 8161
(2) Install housing seal with Handle C-4171 (Fig.
131) and Installer.
²Light Duty - Installer C-3972-A
²Heavy Duty - Installer 8154
(3) Install propeller shaft with reference marks
aligned.
Fig. 128 Adapter Housing - 4WD
1 - ADAPTER HOUSING
2 - SEAL
Fig. 129 Extension Housing - 2WD
1 - EXTENSION HOUSING
2 - SEAL
Fig. 130 Extension Housing Bushing
1 - HANDLE C-4171
2 - INSTALLER
3 - EXTENSION HOUSING
21 - 42 MANUAL - NV4500BR/BE
Page 1496 of 2255

(4) Check and fill transmission.
(5) Remove support and lower vehicle.
SHIFT MECHANISM - NV4500
REMOVAL
(1) Remove transmission from vehicle.
(2) Remove shift cover bolts (Fig. 132).
(3) Pry up shift cover at slots provided in cover
(Fig. 133).
(4) Raise cover enough to disengage it from align-
ment dowels in gear case (Fig. 134).
(5) Raise front of shift cover and lift cover up and
off gear case (Fig. 134).
FIFTH-REVERSE SHIFT FORK PADS
Three shift pads on the forks are held in place by
tension and a small locating tang (Fig. 135).
To remove the pads, grasp a pad with hand and tilt
it out and off the fork. If pad is difficult to remove by
hand, insert a screwdriver blade between the pad
and fork and pry the pad off.
EXPANSION PLUG
The expansion plugs at the rear of the shift rail
bores (Fig. 136) can be replaced if loose/leaking.
(1) Drill 6 mm (1/4 in.) diameter hole in center of
the plug to be removed.
(2) Pry plug out of cover with tapered punch.
Fig. 131 Extension Housing Seal
1 - HANDLE C-4171
2 - INSTALLER
Fig. 132 Shift Cover Bolts
1 - SHIFT COVER
2 - BOLTS
Fig. 133 Loosening Shift Cover
1 - SHIFT COVER SLOT
2-PRYTOOL
Fig. 134 Shift Cover
1 - SHIFT COVER
2 - ALIGNMENT DOWELS
BR/BEMANUAL - NV4500 21 - 43
EXTENSION HOUSING SEAL - NV4500 (Continued)