Dodge 2000 DURANGO Service Manual page 109

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DESCRIPTION AND OPERATION
8 1/4 AXLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9 1/4 AXLES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
LUBRICANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
STANDARD DIFFERENTIAL . . . . . . . . . . . . . . . . . 64
TRAC-LOK DIFFERENTIAL . . . . . . . . . . . . . . . . 64
DIAGNOSIS AND TESTING
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . 65
GEAR NOISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
BEARING NOISE . . . . . . . . . . . . . . . . . . . . . . . . . 68
LOW SPEED KNOCK . . . . . . . . . . . . . . . . . . . . . . 68
VIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
DRIVELINE SNAP . . . . . . . . . . . . . . . . . . . . . . . . 68
TRAC–LOK DIFFERENTIAL NOISE . . . . . . . . . . 68
TRAC–LOK TEST . . . . . . . . . . . . . . . . . . . . . . . 68
SERVICE PROCEDURES
LUBRICANT CHANGE . . . . . . . . . . . . . . . . . . . . . 69
REMOVAL AND INSTALLATION
REAR AXLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
AXLE SHAFT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
8 1/4 AND 9 1/4 AXLE SEAL AND BEARING. . . . . 71
PINION SEAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
DIFFERENTIAL . . . . . . . . . . . . . . . . . . . . . . . . . . 74
DIFFERENTIAL SIDE BEARINGS . . . . . . . . . . . . . 75
DESCRIPTION AND OPERATION
8 1/4 AXLE
DESCRIPTION
The 8 1/4 inch axle housings consist of a cast iron
center section with axle tubes extending from either
side. The tubes are pressed into and welded to the
differential housing to form a one-piece axle housing
(Fig. 1).
The axles have 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 vehicle loads are supported by the
axle shaft and bearings. The axle shafts are retained
by C-locks in the differential side gears.
The removable, stamped steel cover provides a
means for inspection and service without removing
the complete axle from the vehicle.
8 1/4 AND 9 1/4 AXLE
TABLE OF CONTENTS
page
DISASSEMBLY AND ASSEMBLY
CLEANING AND INSPECTION
ADJUSTMENTS
SPECIFICATIONS
SPECIAL TOOLS
The tags are attached to the differential housing by a
cover bolt.
ferential pinion mate shaft is retained with a
threaded pin. Differential bearing preload and ring
gear backlash are set and maintained by threaded
adjusters at the outside of the differential housing.
Pinion bearing preload is set and maintained by the
use of a collapsible spacer.
optional. A Trac-Lok
ferential case, and the same internal components as
a standard differential, plus two clutch disc packs.
AXLE IDENTIFICATION
cation of the axle (Fig. 2). A tag is also attached to
the cover.
8 1/4 AND 9 1/4 AXLE
RING GEAR AND EXCITER RING . . . . . . . . . . . . 75
PINION GEAR . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
FINAL ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . 81
STANDARD DIFFERENTIAL . . . . . . . . . . . . . . . . . 81
8 1/4 TRAC-LOK DIFFERENTIAL . . . . . . . . . . . . 82
9 1/4 TRAC-LOK DIFFERENTIAL . . . . . . . . . . . . 86
8 1/4 AND 9 1/4 AXLES . . . . . . . . . . . . . . . . . . . . 90
TRAC-LOK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
8 1/4 AXLE PINION GEAR DEPTH . . . . . . . . . . . . 91
9 1/4 AXLE PINION GEAR DEPTH . . . . . . . . . . . . 92
DIFFERENTIAL BEARING PRELOAD AND
GEAR BACKLASH. . . . . . . . . . . . . . . . . . . . . . . 95
GEAR CONTACT PATTERN ANALYSIS . . . . . . . . 96
SIDE GEAR CLEARANCE . . . . . . . . . . . . . . . . . . 96
8 1/4 INCH AXLE . . . . . . . . . . . . . . . . . . . . . . . . . 98
9 1/4 INCH AXLE . . . . . . . . . . . . . . . . . . . . . . . . . 98
8 1/4 and 9 1/4 INCH AXLE . . . . . . . . . . . . . . . . . 99
8 1/4 AND 9 1/4 AXLES . . . . . . . . . . . . . . . . . . . . 99
The 8 1/4 axle have a date tag and a gear ratio tag.
The differential case is a one-piece design. The dif-
Axles equipped with a Trac-Lok
differential has a one-piece dif-
The axle differential cover can be used for identifi-
3 - 59
page
differential are