1999 DODGE RAM check oil

pinion flange from pinion. Remove oil seal from axle housing.
11) Remove slinger (if equipped), pinion bearing and preload\
shim(s). See Fig. 1. Note thickness of preload shims for reassembly
reference in case shims become misplaced.
12) Remove pinion and bearing from axle housing. Using
appropriate remover, remove front (outer) pinion bearing race from
axle housing. Remove rear (inner) pinion bearing race from axle
housing using remover. Remove pinion bearing depth shims from axle
housing. See Fig. 1. Measure and record shim thickness for reassembly
reference.
13) Remove rear (inner) bearing from pinion, using
appropriate puller. Remove differential bearings from differential
case. Remove preload shims from differential case. See Fig. 1.
Identify preload shim location. Record preload shim thickness for
reassembly reference.
14) Clamp differential case in soft-jaw vise. Remove roll pin
from differential case. Tap pinion shaft from differential case.
Remove pinion gears, pinion gear thrust washers, side gears and side
gear thrust washers from differential case.
Cleaning & Inspection
1) Clean components with solvent and dry with compressed air.
Inspect components for wear. Inspect bearings and bearing races for
wear and pitting. Replace bearings and bearing races as a set. Inspect
ring gear and pinion teeth for wear and chipping. Replace ring gear
and pinion gear as matched set.
2) Check differential case for cracks or scoring of side
gears, thrust washers and pinion thrust faces. Check fit of side gears
to differential case and axle shaft splines. Examine shaft of pinion
shaft for scoring or excessive wear.
3) On axles with Rear Wheel Anti-Lock (RWAL) brakes, if
exciter ring is not removed from differential case, ensure exciter
ring fits tightly on differential case and is fully seated.
NOTE: Lubricate all bearings, bearing races, gears and thrust
washers with gear lube during reassembly.
Reassembly & Adjustments
1) Place differential case in soft-jaw vise. Install side
gears, side gear thrust washers, pinion gears and pinion gear thrust
washers into differential case.
2) Rotate side gears until holes in pinion gears and thrust
washers align with holes in differential case. Install pinion shaft.
Install roll pin in differential case. Stake edge of differential case
in 2 areas, 180 degrees apart, to retain roll pin in place. Remove
differential case from vise.
3) On rear axles with Rear Wheel Anti-Lock (RWAL) brakes,
align tab on exciter ring with slot on differential case if installing
exciter ring. Install ring gear on differential case. Install 2 NEW
ring gear bolts to maintain bolt hole alignment. Using press, press
exciter ring onto differential case using ring gear as a pilot.
4) Install ring gear on differential case (if not previously
installed). Install NEW ring gear bolts. Tighten bolts evenly in
alternating pattern to specification. See TORQUE SPECIFICATIONS table.
Proceed to INITIAL DIFFERENTIAL BEARING PRELOAD.
NOTE: Initial differential bearing preload must be performed to
determine thickness of preload shims in order to obtain zero
end play of differential case. Procedure must be performed
before installing pinion in axle housing.
Initial Differential Bearing Preload
1) Install master bearings on each side of differential case

pinion face. Etched marking, in thousandths of an inch, indicates
deviation from standard dimension.
5) When etched marking is negative (-), add this amount to
pinion depth shim pack to obtain correct shim thickness. When etched
marking is positive (+), subtract this amount from pinion depth shim
pack to obtain correct shim thickness. If etched marking is zero, no
change is required in pinion depth shim pack thickness.
6) Measure pinion depth shims separately using micrometer. If
slinger is used, slinger thickness must also be included in pinion
depth shim pack. Remove pinion depth gauge set components from axle
housing.
7) Place pinion depth shim pack in axle housing bore for rear
(inner) bearing race. Using appropriate bearing race installer, drive
rear (inner) bearing race into axle housing. Ensure bearing race is
fully seated.
8) Using bearing race installer, drive front (outer) bearing\
race into axle housing. Ensure bearing race is fully seated. Proceed
to PINION BEARING PRELOAD.
Pinion Bearing Preload
1) Install slinger on pinion (if equipped). Press rear
(inner) pinion bearing onto pinion until bearing is fully seated.
Install preload shims on pinion. Install pinion in axle housing.
Install front (outer) pinion bearing and slinger (if equipped).
Install pinion flange on pinion.
2) Using holder and Pinion Flange Installer (C-3718) for 246\
and 267 models, Installer (D-191) for 286 models, press pinion flange
onto pinion. Install washer and used pinion nut. Tighten pinion nut to
specification. See TORQUE SPECIFICATIONS table.
3) Using INCH-lb. torque wrench, check torque required to
rotate pinion. This is pinion bearing preload. Ensure pinion bearing
preload is within specification. See AXLE ASSEMBLY SPECIFICATIONS
table.
4) If pinion bearing preload is not within specification,
adjust thickness of preload shims. Decrease shim thickness to increase
pinion bearing preload. Increase shim thickness to decrease pinion
bearing preload.
5) Remove nut and washer from pinion. Using holder and Pinion
Flange Remover (C-452), remove pinion flange from pinion. Ensure oil
seal surface in axle housing is clean.
Fig. 5: Pinion Depth Shim Adjustment Chart
Courtesy of Chrysler Corp.

Fig. 6: Checking Pinion Depth
Courtesy of Chrysler Corp.
6) Coat lip of oil seal with gear lube. Using appropriate oil
seal installer and handle, install oil seal.

bearing preload is checked before disassembly, as previous
pinion bearing preload will be used during reassembly.
Removal
1) Raise and support vehicle. Scribe reference mark on drive
shaft-to-pinion flange on differential for reassembly reference.
Remove bolts and "U" joint straps at pinion flange on differential.
Disconnect drive shaft from differential.
2) Remove rear wheels and brake drums to prevent any drag
that may affect pinion bearing preload reading. Using INCH-lb. torque
wrench, measure amount of force required to rotate pinion. This is
pinion bearing preload. Record pinion bearing preload for reassembly
reference.
3) Using Holder (6719), hold pinion flange. Remove pinion nu\
t
and washer. Scribe reference mark on pinion flange-to-pinion for
reassembly reference. Using appropriate puller, remove pinion flange
from pinion. Remove oil seal from axle housing.
Installation
1) Ensure oil seal surface in axle housing is clean. Coat lip
of oil seal with gear lube. Install oil seal using appropriate seal
installer. Drive oil seal into axle housing until oil seal installer
contacts axle housing.
2) Install pinion flange on pinion with reference mark
aligned. Using appropriate pinion flange installer, install pinion
flange on pinion.
CAUTION: Washer must be installed on pinion with convex side of washer
facing outward (away from pinion).
3) Install washer on pinion with convex side of washer facing
outward (away from pinion). Install NEW pinion nut. Tighten pinion nut\
to 210 ft. lbs. (285 N.m). Rotate pinion several times to seat pinion
bearings.
CAUTION: DO NOT overtighten or loosen then retighten pinion nut when
adjusting pinion bearing preload. If pinion nut is over
tightened, collapsible spacer on pinion must be replaced. See
OVERHAUL.
4) Using INCH-lb. torque wrench, measure pinion bearing
preload. Tighten pinion nut in small increments until original pinion
bearing preload is obtained.
5) To install remaining components, reverse removal procedure
using NEW "U" joint straps and bolts. Ensure all reference marks are
aligned. Tighten bolts to specification. See TORQUE SPECIFICATIONS.
Check lubricant level and add if necessary.
AXLE HOUSING ASSEMBLY
NOTE: It is not necessary to remove axle housing assembly, unless
axle housing is damaged. Differential carrier and components
can be serviced by removing differential assembly from axle
housing.
Removal
1) Raise and support vehicle. Block brake pedal in upward
position so brake pedal cannot be depressed, as brakelines must be
disconnected.
2) Remove rear wheels. DO NOT remove brake drums. Disconnect
brakelines at wheel cylinders. Cap brakelines to prevent fluid loss.
Disconnect axle housing vent hose.
3) Remove brake tee fitting bolt, and disengage brakelines

respective differential bearings for reassembly reference.
6) Remove bolt and adjuster lock (if not previously removed)\
.
Loosen, but DO NOT remove, bearing cap bolts. Using Adjuster Rotator
(C-4164), unscrew adjusters from bearing caps. See Figs. 1 and 2.
Remove bolts, bearing caps, adjusters, and differential assembly.
7) Using Holder (C-3281), hold pinion flange. Remove pinion
nut and washer. Scribe reference mark on pinion flange-to-pinion for
reassembly reference. Using appropriate puller, remove pinion flange
from pinion. Remove oil seal for pinion from axle housing. Using soft
drift punch and hammer, drive pinion from axle housing.
NOTE: Front pinion bearing, bearing race, and collapsible spacer
must be replaced after removing pinion from axle housing.
8) Drive pinion bearing races from axle housing. Remove
pinion bearing from pinion. Remove shim(s) located behind pinion
bearing on pinion. Record shim thickness for reassembly reference.
CAUTION: DO NOT remove ring gear from differential carrier unless
components must be replaced or differential carrier flange
runout must be checked.
9) If removing ring gear (and exciter ring on RWAL brake
equipped models), mount differential carrier in soft-jaw vise. Remove
and discard left-hand thread ring gear bolts. Using soft-face hammer,
drive ring gear from differential carrier. Tap exciter ring from
differential carrier, if equipped.
10) If disassembling differential carrier, rotate side gears
and align pinion gears with opening in differential carrier. Remove
pinion gears and pinion gear thrust washers. See Fig. 1. Remove side
gears and side gear thrust washers.
11) If checking differential carrier flange runout, install
differential carrier, bearing races, bearing caps and adjusters in
axle housing. Ensure components are installed in original location.
Thread adjusters into bearing caps.
12) Tighten bearing cap bolts enough to just hold bearing
caps against axle housing. Using Adjuster Rotator (C-4164), tighten
adjuster so no side play exists. Side play can be checked by prying
differential carrier to one side.
13) Install dial indicator on axle housing with stem resting
against differential carrier flange. See Fig. 2. Rotate differential
carrier and note differential carrier flange runout. Replace
differential carrier if runout exceeds .003" (.08 mm).
14) Remove dial indicator, bearing caps, adjusters, bearing
races and differential carrier. Remove differential bearings from
differential carrier (if necessary).
15) Use appropriate puller and adapter (bearing splitter) to\
remove bearing from carrier. On models with Rear Wheel Anti-Lock
(RWAL) brakes, if removing exciter ring, use hammer and soft drift to
tap exciter ring from differential carrier.

1) Place selected shim on pinion. Press rear (pinion gear
side) pinion bearing on pinion. Lubricate pinion bearing with gear
lube.
CAUTION: DO NOT damage collapsible spacer when installing pinion
flange. If collapsible spacer is collapsed, install new
spacer.
2) Install pinion in axle housing. Install new collapsible
spacer and front (pinion flange side) pinion bearing. Using Pinion
Flange Installer (C-3718) and Holder (6719), install pinion flange o\
n
pinion to fully seat pinion bearings.
3) Remove pinion flange installer and pinion flange. Coat lip
of oil seal with gear lube. Install NEW oil seal. Drive NEW oil seal
into axle housing until oil seal installer contacts axle housing.
Install pinion flange, using pinion flange installer and holder.
CAUTION: Washer must be installed on pinion with convex side of washer
facing outward (away from pinion).
4) Install washer on pinion with convex side of washer facing
outward (away from pinion). Install NEW pinion nut. Using Holder
(6719), hold pinion flange. Tighten pinion nut only enough to remove
end play from pinion. Rotate pinion several times when tightening
pinion nut to fully seat pinion bearings.
5) Tighten pinion nut to 210 ft. lbs. (285 N.m). Remove
holder. Rotate pinion several times in both directions to fully seat
pinion bearings. Using INCH-lb. torque wrench, measure amount of force
required to rotate pinion. This is pinion bearing preload.
CAUTION: If original pinion bearings are installed, tighten pinion nut
until original pinion bearing preload is obtained. DO NOT
overtighten or loosen then retighten pinion nut when
adjusting pinion bearing preload. If pinion nut is
overtightened, replace collapsible spacer on pinion.
6) Continue tightening pinion nut in small increments until
correct bearing preload is obtained. See AXLE ASSEMBLY SPECIFICATIONS.
Go to RING GEAR BACKLASH & DIFFERENTIAL BEARING PRELOAD.
Ring Gear Backlash & Differential Bearing Preload
1) Lubricate differential bearings, bearing races and
adjusters with gear lube. Install differential carrier assembly,
bearing races and adjusters into axle housing.
2) Install bearing caps in original location. Install bolts
in bearing caps. Tighten upper bolts to 120 INCH lbs. (14 N.m).
Tighten lower bolts finger tight until bolt head is lightly seated
against bearing cap.
NOTE: To ensure bearing races are fully seated against differential
bearings, after rotating adjuster, rotate pinion back and
forth 5-10 times. This procedure must be performed anytime
adjusters are rotated.
3) Using Adjuster Rotator (C-4164), rotate each adjuster
inward until differential bearing free play is eliminated. Ensure
approximately .010" (.25 mm) ring gear backlash exists between ring
gear and pinion.
4) Install dial indicator on axle housing cover flange.
Position stem of dial indicator against drive side of tooth on ring
gear. Check ring gear backlash every 90 degrees to find point of
minimum ring gear backlash.
5) Mark ring gear at point of minimum ring gear backlash so

Apply multipurpose lubricant (NLGI grade 2 EP) to "U" joints
and slip joint fittings.
INSPECTION
Abnormal vibration and noise can come from many driveline
sources. Drive shaft vibration/noise increases with vehicle speed
(MPH). A vibration that occurs within a specific speed is not caused
by drive shaft imbalance. Before overhauling driveline, check for
other causes/sources of possible vibration/noise.
TIRES & WHEELS
Check tire inflation and wheel balance. Check for foreign
objects in tread, damaged tread, mismatched tread patterns or
incorrect tire sizes. Check for bent wheels.
CENTER BEARING
Tighten drive shaft center bearing mounting bolts. If bearing
insulator is deteriorated or oil-soaked, or drive shaft can be moved
up/down in support, replace center bearing support assembly.
ENGINE & TRANSMISSION MOUNTS
Tighten mounting bolts. If rubber mounts are deteriorated or
broken, replace as needed.
DRIVE SHAFT(S)
Check drive shaft(s) for missing weights, broken welds, or
for dents affecting balance. Check for undercoating, mud, snow/ice on
drive shaft(s). Clean shafts thoroughly and test drive.
"U" JOINTS
Check for foreign material lodged in joints and flange/yokes.
Check for loose "U" joint-to-flange mounting bolts. Check for worn "U"
joint needle bearings. Check for Reddish-Brown rust-dust around "U"
joint caps. Replace "U" joints if necessary.
ADJUSTMENTS
CHECKING DRIVE SHAFT PHASING
One-Piece Drive Shafts
1) Ensure "U" joint flanges on either end of drive shaft are
in same plane. See Fig. 2. Drive shafts with slip joints between yokes
often have arrows to aid in alignment. If yokes are not in same plane,
disassemble slip joint from drive shaft splines. Install slip joint
back onto drive shaft splines, aligning "U" joint yokes. Test drive.
2) Single tube type drive shaft has slip joint on outside of
"U" joint yoke (at transmission end). If one-piece tube type drive
shaft yokes are out of alignment, the drive shaft is torque-twisted.
Drive shaft must be replaced.

CRUISE CONTROL VACUUM HOSES, TUBES AND RESERVOIRS
CRUISE CONTROL VACUUM HOSE, TUBE AND RESERVOIR INSPECTION








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Condition Code Procedure
Leaking ................. A .. Require repair or replacement.
Melted .................. A ............ Require replacement.
Missing ................. C ............ Require replacement.
Oil-soaked (spongy) ..... 1 ............ Suggest replacement.
Restricted .............. A .. Require repair or replacement.
Surface cracks (dry-
rotted) ................ 1 ............ Suggest replacement.









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CRUISE CONTROL VEHICLE SPEED SENSORS
CRUISE CONTROL VEHICLE SPEED SENSOR INSPECTION








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Condition Code Procedure
Air gap incorrect ....... B ....... ( 1) Require adjustment to
vehicle manufacturer's
specifications.
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Broken .................. A ............ Require replacement.
Housing cracked ......... A ............ Require replacement.
Internal resistance
does not meet
specifications ......... B ........ ( 2) Require replacement.
Lead routing incorrect .. B .. Require rerouting according to
vehicle manufacturer's
specifications.
Loose ................... B ....... ( 3) Require adjustment to
vehicle manufacturer's
specifications.
Missing ................. C ............ Require replacement.
Output signal incorrect . B ........... ( 2) Require repair or
replacement.
Surface contaminated .... 2 .. Suggest cleaning; identify and
correct source.
Tip bent ................ B ............ Require replacement.
Tip broken .............. B ............ Require replacement.
Tip missing ............. B ............ Require replacement.
Wire lead burned ........ A ............ Require replacement.
Wire lead conductors
exposed ................ B ............ Require replacement.
Wire lead corroded ...... A ............ Require replacement.
Wire lead open .......... A ............ Require replacement.
Wire lead shorted ....... A ............ Require replacement.
( 1) - If a sensor is not adjustable, further inspection is
required to identify and correct cause.
( 2) - Component failure may be caused by water intrusion into
the wiring harness. Always check insulation for damage