Dodge RAM 1500 1998 Owner's Manual page 2150

DR
TRANSFER CASE - NV271
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 447
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 448
DIAGNOSIS AND TESTING - TRANSFER
CASE - NV271 . . . . . . . . . . . . . . . . . . . . . . . 448
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . 450
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . 459
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . 459
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . 461
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 473
SPECIFICATIONS
TRANSFER CASE - NV271
SPECIAL TOOLS
TRANSFER CASE NV271/NV273
EXTENSION HOUSING SEAL AND DUST BOOT
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 476
TRANSFER CASE - NV271
DESCRIPTION
The NV271 transfer case is a part-time transfer
case with a low-range gear system. It provides three
operating ranges plus a NEUTRAL position. The low
range position provides a gear reduction ratio of
2.72:1 for increased low speed torque capability.
The gear cases and extension are all of aluminum
(Fig. 1). Drive sprockets and an interconnecting drive
chain are used to transmit engine torque to the front/
rear propeller shafts. The mainshaft, input gear and
front output shaft are supported by ball and needle
bearings.
TRANSFER CASE - NV271
TABLE OF CONTENTS
page
. . . . . . . . . . . . . 473
. . . . . . . . . 474
TRANSFER CASE - NV271
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 476
FLUID
STANDARD PROCEDURE - FLUID DRAIN AND
REFILL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 476
FRONT OUTPUT SHAFT SEAL
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 477
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 477
POSITION SENSOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . 477
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 477
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 478
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 478
SHIFT LEVER
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 479
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 480
ADJUSTMENTS
ADJUSTMENT - SHIFT LEVER
Fig. 1 Transfer Case - Front View
1 - TRANSFER CASE
2 - MANUAL LEVER
3 - POSITION SENSOR
21 - 447
page
. . . . . . . . . . 481