Dodge RAM 1500 1998 Owner's Manual page 2180

DR
FLUID (Continued)
(6) Fill transfer case to bottom edge of fill plug
opening with Mopar ATF +4, Automatic Transmis-
sion fluid.
(7) Install and tighten fill plug to 41-54 N·m
(30-40 ft. lbs.).
(8) Lower vehicle.
FRONT OUTPUT SHAFT SEAL
REMOVAL
(1) Remove the front propeller shaft (Refer to 3 -
DIFFERENTIAL &
SHAFT/PROPELLER SHAFT - REMOVAL).
(2) Install two bolts 180° apart into the front out-
put shaft companion flange.
(3) Place holder over the bolts and against the
companion flange (Fig. 94).
(4) Remove and discard the front companion flange
nut.
(5) Remove the companion flange from the front
output shaft. It may be necessary to use Flange
puller 8992 to remove the companion flange.
Fig. 94 Remove Companion Flange Nut
1 - HOLDER 6719
2 - BOLTS
(6) Using a screw and a slide hammer, remove the
front output shaft seal.
INSTALLATION
(1) Install the new front output shaft seal with
Installer MB991168A.
(2) Install the front companion flange onto the
front output shaft.
(3) Install two bolts 180° apart into the front out-
put shaft companion flange.
DRIVELINE/PROPELLER
TRANSFER CASE - NV271
(4) Place holder over the bolts and against the
companion flange (Fig. 95).
(5) Install a new front companion flange nut.
Tighten the companion flange nut to 258-312 N·m
(190-230 ft.lbs.).
Fig. 95 Install Companion Flange Nut
1 - HOLDER 6719
2 - BOLTS
(6) Install front propeller shaft (Refer to 3 - DIF-
FERENTIAL & DRIVELINE/PROPELLER SHAFT/
PROPELLER SHAFT - INSTALLATION).
POSITION SENSOR
DESCRIPTION
The transfer case position sensor is an electronic
device whose output can be interpreted to indicate
the transfer case's current operating mode. The sen-
sor consists of a five position, resistive multiplexed
circuit which returns a specific resistance value to
the Powertrain Control Module (PCM) for each trans-
fer case operating mode. The sensor is located on the
top of the transfer case, just left of the transfer case
centerline and rides against the sector plate rooster-
comb. The PCM supplies 5VDC (+/- 0.5V) to the sen-
sor and monitors the return voltage to determine the
sector plate, and therefore the transfer case, position.
OPERATION
During normal vehicle operation, the Powertrain
Control Module (PCM) monitors the transfer case
position sensor return voltage to determine the oper-
ating mode of the transfer case. Refer to the Operat-
ing Mode Versus Resistance table for the correct
resistance for each position (Fig. 96).
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