Page 2153 of 2627

REMOVAL
(1) Raise and support vehicle.
(2) Remove skid plate, if equipped. (Refer to 13 -
FRAMES & BUMPERS/FRAME/TRANSFER CASE
SKID PLATE - REMOVAL)
(3) Position drain oil container under transfer
case.
(4) Remove transfer case drain plug and drain
lubricant into container.
(5) Disconnect vent hose and transfer case position
sensor connector.
(6) Disconnect shift rod from grommet in transfer
case shift lever, or from floor shift arm whichever
provides easy access. Use channel lock style pliers to
press rod out of lever grommet.
(7) Support transmission with jack stand.
(8) Mark front and rear propeller shafts for assem-
bly reference.
(9) Remove front and rear propeller shafts. (Refer
to 3 - DIFFERENTIAL & DRIVELINE/PROPELLER
SHAFT/PROPELLER SHAFT - REMOVAL)
(10) Support transfer case with suitable jack.
Secure transfer case to jack with safety chains.
(11) Remove nuts attaching transfer case to trans-
mission.
(12) Move transfer case assembly rearward until
free of transmission output shaft.
(13) Lower jack and move transfer case from
under vehicle.
DISASSEMBLY
Position transfer case in a shallow drain pan.
Remove drain plug and drain any remaining lubri-
cant remaining in case.
COMPANION FLANGE AND EXTENSION HOUSING
(1) Install two bolts 180É apart into the front out-
put shaft companion flange.
(2) Place holder over the bolts and against the
companion flange (Fig. 3).
(3) Remove and discard the front companion flange
nut.
(4) Remove the companion flange from the front
output shaft. It may be necessary to use Flange
puller 8992 to remove the companion flange.
(5) Use a suitable chisel or pry tool to remove the
rear extension housing dust boot (Fig. 4).
(6) Use a suitable chisel or pry tool to remove the
rear extension housing seal.
Fig. 3 Remove Companion Flange Nut
1 - HOLDER 6719
2 - BOLTS
Fig. 4 Remove Extension Housing Dust Boot
1 - EXTENSION HOUSING
2 - DUST BOOT
21 - 450 TRANSFER CASE - NV271DR
TRANSFER CASE - NV271 (Continued)
Page 2154 of 2627
(7) Remove rear extension bolts (Fig. 5).
(8) Remove rear extension housing (Fig. 6). Tap
extension once or twice with a plastic mallet to break
sealer bead and loosen it.OIL PUMP AND REAR CASE
(1) Disengage the oil pump pick-up tube (Fig. 7)
from the oil pump.
NOTE: The oil pump pick-up tube seals to the oil
pump with an o-ring. Verify that the o-ring was
removed with the tube and is in good condition.
Replace the o-ring if necessary.
(2) Remove the oil pump (Fig. 8).
Fig. 5 Remove Extension Housing Bolts
1 - EXTENSION HOUSING
2 - BOLTS
Fig. 6 Remove Extension Housing
1 - REAR CASE HALF
2 - EXTENSION HOUSING
Fig. 7 Disengage The Oil Pick-up From Oil Pump
1 - OIL PUMP
2 - OIL PICK-UP TUBE
Fig. 8 Remove Oil Pump
1 - REAR CASE HALF
2 - REAR OUTPUT SHAFT
3 - OIL PUMP
DRTRANSFER CASE - NV271 21 - 451
TRANSFER CASE - NV271 (Continued)
Page 2155 of 2627
(3) Remove rear case-to-front case bolts (Fig. 9).
(4) Remove the rear output shaft bearing inner
snap-ring (Fig. 10) from the output shaft using suit-
able snap-ring pliers.
(5) Remove the rear output shaft bearing inner
snap-ring (Fig. 11) from the output shaft.
(6) Loosen rear case with pry tool to break sealer
bead. Insert tool at each end of case (Fig. 12).
Fig. 9 Remove Case Half Bolts
1 - FRONT CASE HALF
2 - REAR CASE HALF
3 - BOLTS
Fig. 10 Remove Rear Bearing Inner Snap-Ring
1 - OUTPUT SHAFT
2 - REAR CASE HALF
3 - SNAP-RING
Fig. 11 Remove Rear Bearing Inner Snap-Ring
1 - OUTPUT SHAFT
2 - REAR CASE HALF
3 - SNAP-RING
Fig. 12 Separate Front and Rear Case Halves
1 - FRONT CASE HALF
2 - REAR CASE HALF
21 - 452 TRANSFER CASE - NV271DR
TRANSFER CASE - NV271 (Continued)
Page 2156 of 2627
(7) Unseat rear case from alignment dowels.
(8) Remove the rear case from the front case (Fig.
13).
FRONT OUTPUT SHAFT AND DRIVE CHAIN
(1) Remove the oil pick-up tube (Fig. 14) and
screen from the front case half.
(2) Remove the shift rail spring (Fig. 15).(3) Remove the front output shaft drive sprocket
retaining ring (Fig. 16).
Fig. 16 Remove Front Output Shaft Sprocket
Retaining Ring
1 - FRONT OUTPUT SHAFT
2 - DRIVE SPROCKET
3 - RETAINING RING
Fig. 13 Remove Rear Case Half
1 - FRONT CASE HALF
2 - REAR CASE HALF
Fig. 14 Remove Oil Pick-Up Tube and Screen
1 - FRONT CASE HALF
2 - OIL SCREEN
3 - PICK-UP TUBE
Fig. 15 Remove Shift Rail Spring
1 - SHIFT RAIL
2 - SPRING
DRTRANSFER CASE - NV271 21 - 453
TRANSFER CASE - NV271 (Continued)
Page 2157 of 2627
(4) Remove the rear output shaft drive sprocket
retaining ring (Fig. 17).
(5) Pull front sprocket (Fig. 18), rear sprocket, and
chain upward until clear of the front and rear output
shaft sprocket splines.
(6) Remove chain and sprockets as an assembly.SHIFT FORKS AND MAINSHAFT
(1) Shift transfer case into NEUTRAL.
(2) Remove nut that retains the shift lever to sec-
tor shaft. Then remove shift lever (Fig. 19) and
spacer from the shaft.
(3) Remove the sector support with Socket 9033.
(4) Remove the transfer case position sensor (Fig.
20).
Fig. 17 Remove Rear Output Shaft Sprocket
Retaining Ring
1 - REAR OUTPUT SHAFT
2 - DRIVE SPROCKET
3 - RETAINING RING
Fig. 18 Remove Drive Chain and Sprockets
1 - FRONT CASE HALF
2 - CHAIN
3 - DRIVE SPROCKETS
Fig. 19 Remove Manual Shift Lever
1 - SHIFT SECTOR
2 - SECTOR SUPPORT
3 - MANUAL SHIFT LEVER
Fig. 20 Remove Position Sensor
1 - FRONT CASE
2 - POSITION SENSOR
21 - 454 TRANSFER CASE - NV271DR
TRANSFER CASE - NV271 (Continued)
Page 2158 of 2627
(5) Loosen detent plug (Fig. 21).
(6) Remove detent plug, spring, and plunger (Fig.
22). Note that the plug has an O-ring seal. Remove
and discard this seal.(7) Using a screw mounted in a slide hammer,
remove the front output shaft seal.
(8) Remove the front output shaft snap-ring (Fig.
23).
(9) Remove front output shaft from bearing in case
(Fig. 24).
Fig. 21 Loosen the Detent Plug
1 - FRONT CASE HALF
2 - DETENT PLUG
Fig. 22 Remove Detent plug, Spring, and Plunger
1 - FRONT CASE HALF
2 - DETENT PLUG
3 - SPRING
4 - PLUNGER
Fig. 23 Remove Front Output Shaft Bearing Inner
Snap-Ring
1 - FRONT CASE HALF
2 - SNAP-RING
Fig. 24 Remove Front Output Shaft
1 - FRONT CASE
2 - FRONT OUTPUT SHAFT
DRTRANSFER CASE - NV271 21 - 455
TRANSFER CASE - NV271 (Continued)
Page 2159 of 2627
(10) Pull mainshaft assembly out of input gear,
mode sleeve, and case (Fig. 25).
(11) Remove mode fork, mode sleeve, and shift rail
as assembly (Fig. 26). Note which way the sleeve fits
in the fork (long side of sleeve goes to front or the
points on the sleeve teeth go to the rear of case).(12) Remove range fork and hub as an assembly
(Fig. 27). Note fork position for installation reference.
(13) Remove shift sector (Fig. 28).
Fig. 25 Remove Mainshaft Assembly
1 - FRONT CASE HALF
2 - MAINSHAFT ASSEMBLY
Fig. 26 Remove Mode Fork, Sleeve, and Shift Rail
Assembly
1 - SHIFT RAIL
2 - MODE FORK
3 - MODE SLEEVE
Fig. 27 Range Fork And Hub Removal
1 - RANGE HUB
2 - RANGE FORK
Fig. 28 Remove Shift Sector
1 - SHIFT SECTOR
21 - 456 TRANSFER CASE - NV271DR
TRANSFER CASE - NV271 (Continued)
Page 2160 of 2627
MAINSHAFT
(1) Remove the clutch gear (Fig. 29) from the out-
put shaft.
(2) Remove the mode hub retaining ring (Fig. 30)
from the mainshaft.
(3) Remove the mode hub (Fig. 31) from the main-
shaft.
(4) Remove the drive sprocket drive hub (Fig. 32)
from the mainshaft.
Fig. 29 Remove Clutch Gear
1 - OUTPUT SHAFT
2 - CLUTCH GEAR
3 - MODE HUB
Fig. 30 Remove Mode Hub Retaining Ring
1 - MAINSHAFT
2 - MODE HUB
3 - RETAINING RING
Fig. 31 Remove Mode Hub
1 - MAINSHAFT
2 - MODE HUB
Fig. 32 Remove the Drive Sprocket Drive Hub
1 - MAINSHAFT
2 - DRIVE SPROCKET DRIVE HUB
DRTRANSFER CASE - NV271 21 - 457
TRANSFER CASE - NV271 (Continued)