Dodge Dakota Sport 2001 Service Manual page 1946

AN
TRANSFER CASE - NV233
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 537
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 538
DIAGNOSIS AND TESTING . . . . . . . . . . . . . . . . 538
TRANSFER CASE - NV233. . . . . . . . . . . . . . . 538
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 539
DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 540
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 546
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 546
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 549
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 558
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . 559
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . 559
FLUID
STANDARD PROCEDURE . . . . . . . . . . . . . . . . . 561
FLUID DRAIN AND REFILL . . . . . . . . . . . . . . . 561
FRONT OUTPUT SHAFT SEAL
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 561
TRANSFER CASE - NV233
DESCRIPTION
The NV233 is an electronically controlled part-time
transfer case with a low range gear reduction system.
The NV233 has three operating ranges plus a NEU-
TRAL position. The low range system provides a gear
reduction ratio for increased low speed torque capa-
bility.
The geartrain is mounted in two aluminum case
halves attached with bolts. The mainshaft front and
rear bearings are mounted in aluminum retainer
housings bolted to the case halves.
OPERATING RANGES
Transfer case operating ranges are:
• 2WD (2-wheel drive)
• 4HI (4-wheel drive)
• 4LO (4-wheel drive low range)
• NEUTRAL
The 2WD range is for use on any road surface at
any time.
TRANSFER CASE - NV233
TABLE OF CONTENTS
page
TRANSFER CASE - NV233
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 561
MODE SENSOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 562
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 562
REAR RETAINER BUSHING AND SEAL
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 563
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 563
SELECTOR SWITCH
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 564
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 564
SHIFT MOTOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 565
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 565
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 565
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 566
The 4HI and 4LO ranges are for off road use only.
They are not for use on hard surface roads. The only
exception being when the road surface is wet or slip-
pery or covered by ice and snow.
The low range reduction gear system is operative
in 4LO range only. This range is for extra pulling
power in off road situations. Low range reduction
ratio is 2.72:1.
SHIFT MECHANISM
Operating ranges
mounted shift selector switch. The shift selector
switch provides a input to the Transfer Case Control
Module (TCCM) to indicate the driver's desire to
change operating ranges. The TCCM uses this input,
along with input from the transfer case mounted
mode sensor and information from the vehicle's bus,
to determine if a shift is permitted. If the TCCM
decides the shift is permitted, the TCCM controls the
shift motor, mounted to the exterior of the transfer
case, to perform the shift.
21 - 537
are selected with
page
a dash