Jeep Cherokee 2000, Service Manual

Page: 101 / 1528

194 RBI AXLE
TABLE OF CONTENTS
page page
DESCRIPTION AND OPERATION
194 RBI AXLE . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
LUBRICANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
STANDARD DIFFERENTIAL . . . . . . . . . . . . . . . . . 66
TRAC-LOK
Y
DIFFERENTIAL . . . . . . . . . . . . . . . . 66
DIAGNOSIS AND TESTING
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . 67
GEAR NOISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
BEARING NOISE . . . . . . . . . . . . . . . . . . . . . . . . . 70
LOW SPEED KNOCK . . . . . . . . . . . . . . . . . . . . . . 70
VIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
DRIVELINE SNAP . . . . . . . . . . . . . . . . . . . . . . . . 70
TRAC–LOK
Y
DIFFERENTIAL NOISE . . . . . . . . . . 70
TRAC–LOK
Y
TEST . . . . . . . . . . . . . . . . . . . . . . . 71
SERVICE PROCEDURES
LUBRICANT CHANGE . . . . . . . . . . . . . . . . . . . . . 71
REMOVAL AND INSTALLATION
REAR AXLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
PINION SHAFT SEAL . . . . . . . . . . . . . . . . . . . . . . 72
COLLAPSIBLE SPACER. . . . . . . . . . . . . . . . . . . . 74
AXLE SHAFT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
AXLE SHAFT SEAL AND BEARING . . . . . . . . . . . 77
DIFFERENTIAL . . . . . . . . . . . . . . . . . . . . . . . . . . 78
DIFFERENTIAL SIDE BEARINGS . . . . . . . . . . . . . 80
RING GEAR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
PINION GEAR . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
FINAL ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . 85
DISASSEMBLY AND ASSEMBLY
STANDARD DIFFERENTIAL . . . . . . . . . . . . . . . . . 86
TRAC-LOK
Y
DIFFERENTIAL . . . . . . . . . . . . . . . . 87
CLEANING AND INSPECTION
AXLE COMPONENTS . . . . . . . . . . . . . . . . . . . . . 91
TRAC-LOK
Y
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
ADJUSTMENTS
PINION GEAR DEPTH . . . . . . . . . . . . . . . . . . . . . 91
DIFFERENTIAL BEARING PRELOAD AND
GEAR BACKLASH. . . . . . . . . . . . . . . . . . . . . . . 94
GEAR CONTACT PATTERN ANALYSIS . . . . . . . . 97
SPECIFICATIONS
194 RBI AXLE . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
194 RBI AXLE . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
SPECIAL TOOLS
194 RBI AXLE . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
DESCRIPTION AND OPERATION
194 RBI AXLE
DESCRIPTION
The 194 Rear Beam-design Iron (RBI) axle housing
has an iron center casting (differential housing) with
axle shaft tubes extending from either side. The
tubes are pressed into and welded to the differential
housing to form a one-piece axle housing.
The integral type, hypoid gear design, housing has
the centerline of the pinion set below the centerline
of the ring gear.
The axle has a vent hose to relieve internal pres-
sure caused by lubricant vaporization and internal
expansion.
The axles are equipped with semi–floating axle
shafts, meaning that loads are supported by the axle
shaft and bearings. The axle shafts are retained by
C–clips in the differential side gears.
The cover provides a means for servicing the differ-
ential without removing the axle.
For vehicles equipped with ABS brakes, the axles
have a tone ring pressed onto the axle shaft. Use care
when removing axle shafts to ensure that the tone
wheel or the wheel speed sensor are not damaged.
The 194 RBI axle has the assembly part number
and gear ratio listed on a tag. The tag is attached to
the differential housing by a cover bolt. Build date
identification codes are stamped on the cover side of
an axle shaft tube.
The differential case is a one-piece design. The dif-
ferential pinion mate shaft is retained with a
threaded pin. Differential bearing preload and ring
gear backlash is adjusted by the use of selective
spacer shims. Pinion bearing preload is set and
maintained by the use of a collapsible spacer (Fig. 1).
Axles equipped with a Trac-Lok
y
differential are
optional. A Trac-Lok differential has a one-piece dif-
ferential case, and the same internal components as
a standard differential, plus two clutch disc packs.
OPERATION
The axle receives power from the transmission/
transfer case through the rear propeller shaft. The
rear propeller shaft is connected to the pinion gear
which rotates the differential through the gear mesh
with the ring gear bolted to the differential case. The
engine power is transmitted to the axle shafts
through the pinion mate and side gears. The side
gears are splined to the axle shafts.
XJ
194 RBI AXLE 3 - 65