1998 DODGE RAM 1500 4X4

Component Page
Speaker-Right Instrument Panel....... 8W-80-96
Speaker-Right Rear................. 8W-80-96
Speed Control Servo (Diesel A/T/NGC) . . . 8W-80-97
Speed Control Switch-Left (ETC)....... 8W-80-97
Speed Control Switch-Left
(Except ETC).................... 8W-80-97
Speed Control Switch-Right (ETC)...... 8W-80-97
Speed Control Switch-Right (Except
ETC)........................... 8W-80-97
Tail/Stop/Turn Signal Lamp-Left....... 8W-80-98
Tail/Stop/Turn Signal Lamp-Right...... 8W-80-98
Tailgate Lamp..................... 8W-80-98
Throttle Position Sensor (3.7L)......... 8W-80-98
Throttle Position Sensor (4.7L)......... 8W-80-99
Tow/haul Overdrive Switch............ 8W-80-99
Trailer Tow Connector............... 8W-80-99
Trailer Tow Connector-Add On......... 8W-80-99
Transfer Case Control Module C1 (Electric
4x4).......................... 8W-80-100
Transfer Case Control Module C2 (Electric
4x4).......................... 8W-80-100Component Page
Transfer Case Control Module C3
(Electric 4x4)................... 8W-80-101
Transfer Case Mode Sensor.......... 8W-80-101
Transfer Case Selector Switch........ 8W-80-101
Transfer Case Shift Motor........... 8W-80-101
Transmission Range Sensor.......... 8W-80-102
Transmission Solenoid Assembly
(48RE)........................ 8W-80-102
Transmission Solenoid/TRS Assembly
(NGC)......................... 8W-80-102
Vacuum Pump (Diesel).............. 8W-80-103
Vistronic Fan Drive (Diesel).......... 8W-80-103
Washer Fluid Level Switch........... 8W-80-103
Washer Pump Motor-Front........... 8W-80-103
Water In Fuel Sensor............... 8W-80-103
Wheel Speed Sensor-Left Front....... 8W-80-104
Wheel Speed Sensor-Rear............ 8W-80-104
Wheel Speed Sensor-Right Front...... 8W-80-104
Wiper Motor...................... 8W-80-104
8W - 80 - 4 8W-80 CONNECTOR PIN-OUTSDR

TRANSFER CASE CONTROL MODULE C1 (ELECTRIC 4x4) - 16 WAY
CAV CIRCUIT FUNCTION
A1 D25 20VT/DB PCI BUS
A2 - -
A3 - -
A4 G92 20VT/OR 4WD LOW INDICATOR
A5 G91 20VT/WT 4WD HIGH INDICATOR
A6 K977 20BR/WT MODE SELECT
A7 T885 20YL/GY MODE SENSOR GROUND
A8 Z905 18BK GROUND
A9 - -
A10 - -
A11 - -
A12 G95 20VT/BR NEUTRAL INDICATOR
A13 G2 20BR/WT IGNITION SWITCH SENSE
A14 D200 20WT/LG MODE SENSOR D
A15 - -
A16 Z905 20BK GROUND
TRANSFER CASE CONTROL MODULE C2 (ELECTRIC 4x4) - 16 WAY
CAV CIRCUIT FUNCTION
B1 D202 20WT/VT MODE SENSOR B
B2 D201 20WT/DG MODE SENSOR A
B3 - -
B4 - -
B5 - -
B6 T41 20YL/DB TRS T41 SENSE
B7 - -
B8 T313 20YL/LG 5 VOLT MODE SENSOR SUPPLY
B9 - -
B10 D203 20WT/BR MODE SENSOR C
B11 - -
B12 - -
B13 - -
B14 - -
B15 - -
B16 T322 20DG/GY 5 VOLT SELECTOR SWITCH SUPPLY
8W - 80 - 100 8W-80 CONNECTOR PIN-OUTSDR

TRANSFER CASE CONTROL MODULE C3 (ELECTRIC 4x4)-4WAY
CAV CIRCUIT FUNCTION
A Z905 16BK GROUND
B A34 16RD/WT FUSED B(+)
C T315 16YL/BR SHIFT MOTOR CONTROL A
D T316 16YL/GY SHIFT MOTOR CONTROL B
TRANSFER CASE MODE SENSOR-6WAY
CAV CIRCUIT FUNCTION
1 D200 20WT/LG MODE SENSOR D
2 T313 20YL/LG 5 VOLT MODE SENSOR SUPPLY
3 D202 20WT/VT MODE SENSOR B
4 T885 20YL/GY MODE SENSOR GROUND
5 D201 20WT/DG MODE SENSOR A
6 D203 20WT/BR MODE SENSOR C
TRANSFER CASE SELECTOR SWITCH - 12 WAY
CAV CIRCUIT FUNCTION
1 T322 20DG/GY 5 VOLT SELECTOR SWITCH SUPPLY
2 G2 20BR/WT IGNITION SWITCH SENSE
3- -
4 G95 20VT/BR NEUTRAL INDICATOR
5 K977 20BR/WT MODE SELECT
6 E11 20OR/DB PANEL LAMPS DRIVER
7 F21 20PK/DG FUSED IGNITION SWITCH OUTPUT (RUN-START)
8 G92 20VT/OR 4WD LOW INDICATOR
9 G91 20VT/WT 4WD HIGH INDICATOR
10 - -
11 Z905 20BK GROUND
12 - -
TRANSFER CASE SHIFT MOTOR-2WAY
CAV CIRCUIT FUNCTION
1 T316 16YL/GY SHIFT MOTOR CONTROL B
2 T315 16YL/BR SHIFT MOTOR CONTROL A
DR8W-80 CONNECTOR PIN-OUTS 8W - 80 - 101

Fig. 15 TRANSMISSION 45RFE (4X4) (3.7L/4.7L)
DR8W-91 CONNECTOR/GROUND/SPLICE LOCATION 8W - 91 - 25
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

Fig. 17 MANUAL TRANSMISSION (4X4) (3.7L/4.7L)
DR8W-91 CONNECTOR/GROUND/SPLICE LOCATION 8W - 91 - 27
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

FRONT MOUNT
REMOVAL
2WD
(1) Disconnect the negative cable from the battery.
CAUTION: Remove the viscous fan before raising
engine. Failure to do so may cause damage to the
fan blade, fan clutch and fan shroud.
(2) Remove the viscous fan (Refer to 7 - COOL-
ING/ENGINE/FAN DRIVE VISCOUS CLUTCH -
REMOVAL).
(3) Raise the vehicle.
(4) Remove the engine oil filter.
(5) Remove the oil drain trough.
(6)
Support the engine with a suitable jack and a
block of wood across the full width of the engine oil pan.
(7) Support the front axle with a suitable jack.
(8) Remove the (4) bolts that attach the engine
mounts to the front axle.
(9) Remove the (3) bolts that attach the front axle
to the left engine bracket.
(10) Lower the front axle.
(11) Remove the through bolts(12) Raise the engine far enough to be able to
remove the left and right engine mounts.
(13) Remove the (8) mount to engine attaching
bolts
(14) Remove the engine mounts.
4WD
(1) Disconnect the negative cable from the battery.
CAUTION: Remove the viscous fan before raising
engine. Failure to do so may cause damage to the
fan blade, fan clutch and fan shroud.
(2) Remove the viscous fan (Refer to 7 - COOL-
ING/ENGINE/FAN DRIVE VISCOUS CLUTCH -
REMOVAL).
(3) Raise the vehicle.
(4) Remove the skid plate.
(5) Remove the front crossmember.
(6) Remove the engine oil filter.
(7) Remove the oil drain trough.
(8) Support the engine with a suitable jack and a
block of wood across the full width of the engine oil
pan.
(9) Support the front axle with a suitable jack.
(10) Remove the (4) bolts that attach the engine
mounts to the front axle (Fig. 66).
Fig. 66 ENGINE INSULATOR MOUNTS 4X4
1 - RH INSULATOR TO AXLE BOLT
2 - NUT
3 - PINION SUPPORT MOUNT
4 - LH INSULATOR MOUNT5 - LH INSULATOR TO AXLE BOLT
6 - FRONT AXLE
7 - NUT
8 - RH INSULATOR MOUNT
9 - 58 ENGINE - 3.7LDR

(6) Loose assemble the lower through bolts.
(7) Torque the nuts for the (4) through bolts to 101
N´m (75 ft. lbs.).
(8) Torque the (3) bolts that attach the front axle
to the left engine bracket to 101 N´m (75 ft. lbs.).
(9) Install the oil drain trough.
(10) Install the engine oil filter.(11) Install the front crossmember.
(12) Install the skid plate.
(13) Lower the vehicle.
(14) Install the viscous fan (Refer to 7 - COOL-
ING/ENGINE/FAN DRIVE VISCOUS CLUTCH -
REMOVAL).
(15) Reconnect the negative battery cable.
Fig. 69 ENGINE INSULATOR MOUNTS 4X4
1 - RH INSULATOR TO AXLE BOLT
2 - NUT
3 - PINION SUPPORT MOUNT
4 - LH INSULATOR MOUNT5 - LH INSULATOR TO AXLE BOLT
6 - FRONT AXLE
7 - NUT
8 - RH INSULATOR MOUNT
9 - 60 ENGINE - 3.7LDR
FRONT MOUNT (Continued)

to one gasket surface. Be certain the material sur-
rounds each mounting hole. Excess material can eas-
ily be wiped off. Components should be torqued in
place within 15 minutes. The use of a locating dowel
is recommended during assembly to prevent smear-
ing material off the location.
MopartEngine RTV GEN II or ATF RTV gasket
material should be applied in a continuous bead
approximately 3 mm (0.120 in.) in diameter. All
mounting holes must be circled. For corner sealing, a
3.17 or 6.35 mm (1/8 or 1/4 in.) drop is placed in the
center of the gasket contact area. Uncured sealant
may be removed with a shop towel. Components
should be torqued in place while the sealant is still
wet to the touch (within 10 minutes). The usage of a
locating dowel is recommended during assembly to
prevent smearing material off the location.
MopartGasket Sealant in an aerosol can should be
applied using a thin, even coat sprayed completely
over both surfaces to be joined, and both sides of a
gasket. Then proceed with assembly. Material in a
can w/applicator can be brushed on evenly over the
sealing surfaces. Material in an aerosol can should be
used on engines with multi-layer steel gaskets.
REMOVAL
NOTE: This procedure applies to both the 4X2 and
4X4 vehicles, steps that apply to the 4X4 vehicle
only, are identified.
(1) Disconnect the battery negative and positive
cables.
(2) Remove the battery and the battery tray.
(3) Raise vehicle on hoist.
(4) Remove exhaust crossover pipe from exhaust
manifolds.
(5)4X4 vehiclesDisconnect axle vent tube from
left side engine mount.
(6) Remove the through bolt retaining nut and bolt
from both the left and right side engine mounts.
(7)4X4 vehiclesRemove locknut from left and
right side engine mount brackets.
(8) Disconnect two ground straps from the lower
left hand side and one ground strap from the lower
right hand side of the engine.
(9) Disconnect crankshaft position sensor. (Fig. 1)
NOTE: The following step applies to 4X4 vehicles
equipped with automatic transmission only.(10)4X4 vehiclesRemove the axle isolator
bracket from the engine, transmission and the axle.
(11) Remove structural cover (Refer to 9 -
ENGINE/ENGINE BLOCK/STRUCTURAL COVER -
REMOVAL).
(12) Remove starter (Refer to 8 - ELECTRICAL/
STARTING/STARTER MOTOR - REMOVAL).
(13) Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
(14) Remove torque converter bolts (Automatic
Transmission Only).
(15) Remove transmission to engine mounting
bolts.
(16) Disconnect the engine block heater power
cable from the block heater, if equipped.
(17) Lower vehicle.
(18) Remove throttle body resonator assembly and
air inlet hose.
Fig. 1 Crankshaft Position Sensor
1 - CRANKSHAFT POSITION SENSOR
2 - CYLINDER HEAD COVER
3 - CAMSHAFT POSITION SENSOR
4 - RIGHT SIDE CYLINDER BLOCK
DRENGINE - 4.7L 9 - 95
ENGINE - 4.7L (Continued)