1999 DODGE RAM parking brake

threads. Right side assembly has right-hand threads.
Installation
1) Lubricate and assemble adjustment star wheel. Apply thin
film of multipurpose grease to shoe contact pads on support plate.
Assemble lower shoe-to-shoe spring, adjustment star wheel and both
shoes. Position shoe assembly on support plate.
2) Attach parking brake cable to lever using NEW "U" clip or
"E" clip. Install shoe hold-down pins, springs and retainers. Install
upper shoe-to-shoe spring. Position adjusting lever return spring on
pivot. Install adjusting lever. Route cable, and connect it to
adjuster. Install drum assembly and wheel. Adjust brakes. See REAR
BRAKE SHOES under ADJUSTMENTS.
WHEEL CYLINDERS
Removal & Installation
1) Remove wheel, drum and brake shoes. Inspect boots for
damage and signs of leakage. Disconnect and plug hydraulic brakeline
from wheel cylinder. Remove attaching bolts, and remove cylinder. See
Fig. 5 .
2) Apply silicone sealant to cylinder mounting surface, and
position cylinder on support plate. Start brakeline fitting in wheel
cylinder. Install and tighten mounting bolts. Tighten brakeline
fitting. To complete installation, reverse removal procedure. Fill
brake fluid reservoir, and bleed hydraulic system. See BLEEDING
PROCEDURES under BLEEDING BRAKE SYSTEM.
Fig. 5: Exploded View Of Rear Wheel Cylinder (Typical)
Courtesy of Chrysler Corp.
MASTER CYLINDER & RESERVOIR
NOTE: Manufacturer does not recommend overhaul of master cylinder.
Removal and replacement of reservoir and grommets are the
only recommended service procedures. Replace master cylinder
if faulty.

being replaced, remove booster check valve and seal.
Installation
1) If new booster is being installed, install check valve and
seal. Position booster on dash, and install lock nuts on booster
mounting studs finger tight. Install booster push rod on brake pedal
pin, and secure rod with NEW retaining clip.
2) Tighten booster lock nuts to specification. Install master
cylinder on booster, and tighten mounting nuts to specification. See
TORQUE SPECIFICATIONS table. Connect vacuum hose to booster check
valve. Start vehicle and check booster operation.
COMBINATION VALVE
Removal & Installation
Raise and support vehicle. Mark brakelines for assembly
reference. Disconnect parking brake cable from clip on valve, if
necessary. Disconnect brake warning light connection at switch.
Disconnect all brake hydraulic lines at valve. Cap brakelines to
prevent dirt from entering system. Remove valve. To install, reverse
removal procedures. Bleed brake system. See BLEEDING PROCEDURES under
BLEEDING BRAKE SYSTEM.
AXLE BEARING & SEAL (FULL FLOATING AXLE)
Removal & Installation (Ram Pickup With 12" & 13" Drums)
1) Raise and support vehicle. Remove wheel. Remove axle shaft
nuts and washers. Strike center of axle flange to free cones. Remove
axle shaft and gasket.
2) Straighten and remove nut lock. Remove adjustment nut and
outer bearing. Remove drum assembly. Remove seal and inner bearing
from drum assembly.
3) Pack inner bearing, and install inner bearing and seal in
drum. Install drum assembly, outer bearing and adjustment nut. While
rotating drum, tighten adjustment nut to specification. See TORQUE
SPECIFICATIONS table.
4) Back off adjustment nut 1/8 turn to obtain .001-.010" (0.
025-0.254 mm) end play. Bend nut lock into spindle keyway. Install
gasket and axle shaft. Install wheel, and lower vehicle. See TORQUE
SPECIFICATIONS table.
OVERHAUL
NOTE: Use illustrations when overhauling components. See
Figs. 2-6.
DISC BRAKE SPECIFICATIONS
DISC BRAKE SPECIFICATIONS








\









\









\









\









\









\









\







Application In. (mm)\
Disc Diameter
Dakota ............................................... 11.30 (287)\
Ram Pickup
1/2 Ton ............................................. 11.57 (294)\
3/4 & 1 Ton ......................................... 12.50 (318)\
Ram Van
1/2 & 3/4 Ton ....................................... 11.75 (299)\
1 Ton ............................................... 12.82 (326)\
Lateral Runout

(1) - Approximate drive axle capacity listed. Lubricant level should
be within 1/2" below bottom of oil filler hole in axle housing
cover.
( 2) - Add container of Mopar Gear Oil Friction Modifier when
refilling.









\









\









\









\









\









\









\







FLUID TYPE
Use SAE 80W-90 or SAE 90W hypoid gear lubricant with MIL-L-
2105-B and API GL-5 ratings. Also add a container of Mopar Gear Oil
Friction Modifier when refilling.
FLUID DRAIN & REFILL
1) With lubricant of rear axle assembly at normal operating
temperature, raise and support vehicle so rear wheels are free to
rotate. Clean around axle housing cover. Loosen axle housing cover
bolts. Drain lubricant from axle housing. Remove bolts and axle
housing cover.
2) Position differential so hole in differential case faces
down. Wipe all accessible areas of axle housing. Ensure sealing
surfaces on axle housing and cover are clean. Apply a 1/4" thick bead
of silicone sealant on inside of bolt holes and along sealing surfaces
on axle housing cover.
3) Install axle housing cover, axle identification tag and
retaining bolts. Tighten bolts to 30 ft. lbs. (41 N.m). Remove oil
filler plug. Add a container of Mopar Gear Oil Friction Modifier. Fill
axle with gear lube. Install oil filler plug. Lower vehicle.
TROUBLE SHOOTING
DIFFERENTIAL NOISE
1) Ensure differential lubricant is at normal operating
temperature. Road test vehicle. Note if differential noise exists in
turns, but not during straight-ahead driving. Probable cause is
incorrect or insufficient rear axle lubricant or additive.
2) Drain and refill rear axle. See FLUID DRAIN & REFILL under
LUBRICATION. Road test vehicle and note if noise still exists, it may
be necessary to disassemble rear axle so differential can be repaired.
See RBI FULL-FLOATING AXLES article for removal of differential case.
TESTING
NOTE: Power-Lok differential can be tested without removing
differential carrier from axle housing. Either test can be
used to check drive axle.
TEST I
1) Place blocks under both front wheels. Ensure engine is off
and transmission is in Neutral. Release parking brake. Raise one rear
wheel until it is completely clear of the floor. Remove wheel. Install
Adapter (6790) to wheel studs, and tighten securely.
2) Using torque wrench on adapter, rotate axle, and record
torque required. Repeat procedure for remaining rear wheel position.
If rotational torque for either rear wheel is less than 30 ft. lbs.
(41 N.m) or greater than 200 ft. lbs. (271 N.m), Power-Lok unit must\
be replaced or repaired.

nut. Tighten pinion nut while rotating pinion, ensuring bearings are
properly seated. Tighten nut until preload measured before disassembly
is achieved. DO NOT exceed maximum torque specification. See TORQUE
SPECIFICATIONS.
3) 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: Removing axle housing assembly is not necessary unless axle
housing is damaged. Differential carrier and components can
be serviced by removing differential assembly from axle
housing.
Removal
1) Block brake pedal in upward position, as brake fluid lines
must be disconnected. Raise and support vehicle at body, in front of
rear springs. Remove rear wheels.
2) Reference mark drive shaft to pinion flange for
reassembly. Remove bolts and "U" joint straps at pinion flange. Remove
drive shaft, and support aside.
3) Disconnect and plug brakelines. Disconnect parking brake
cables. Disconnect shock absorbers. On models with Rear Wheel Anti-
Lock (RWAL) brakes, disconnect electrical connector at brake sensor on\
top of axle housing.
4) On all axles, support axle housing assembly with floor
jack. Remove rear spring "U" bolts. Lower axle housing assembly and
remove from vehicle.
Installation
1) To install, reverse removal procedure. Ensure rear spring
center bolts align with holes in spring pads on axle housing assembly.
2) Ensure reference marks on drive shaft and pinion flange
align. Tighten bolt/nuts to specification. See TORQUE SPECIFICATIONS.
Bleed and adjust brakes. Check axle fluid level and fill if necessary.
DIFFERENTIAL ASSEMBLY
NOTE: Differential assembly consists of differential case and
components mounted in axle housing. For differential assembly
servicing, see DIFFERENTIAL ASSEMBLY under OVERHAUL.
OVERHAUL
DIFFERENTIAL ASSEMBLY
Disassembly
1) On axles with Rear Wheel Anti-Lock (RWAL) brakes, remove
brake sensor from top of axle housing. On all axles, remove axle
shafts from differential. See REAR HUB, BEARINGS & AXLE SHAFT under
REMOVAL & INSTALLATION.
2) Note identification marks on bearing caps and axle housing
for reassembly reference. Bearing caps must be installed in original
location. If marks are not present, place marks on bearing caps and
axle housing.
3) Remove bearing caps. Place Axle Housing Spreader (W-129-B)\
on axle housing so dowel pins engage with locating holes. See Fig. 2.
Install hold-down clamps. Finger tighten turnbuckle on axle housing
spreader.
4) Install Guide Pin (C3288-B) at left side of axle housing.\

from axle housing clips. Disconnect electrical connector from brake
sensor mounted on top of axle housing (if equipped).
4) Disconnect parking brake cables. Scribe mark on drive
shaft and pinion flange for reassembly reference. Remove bolts and "U"
joint straps at pinion flange. Support drive shaft aside to prevent
damage to rear "U" joint.
5) Remove shock absorber from axle housing. Support axle
housing with floor jack. Remove "U" bolt nuts. Remove "U" bolts and
spring brackets. Lower axle housing from vehicle.
Installation
1) To install, reverse removal procedure. Ensure rear spring
center bolts align with holes in spring pads on axle housing.
2) Ensure reference mark on drive shaft and pinion flange are
aligned. Tighten bolt/nuts to proper specification. See TORQUE
SPECIFICATIONS. Bleed and adjust brakes.
DIFFERENTIAL ASSEMBLY
NOTE: Differential assembly consists of differential carrier and
components mounted in axle housing. For differential assembly
servicing, see DIFFERENTIAL ASSEMBLY under OVERHAUL.
OVERHAUL
DIFFERENTIAL ASSEMBLY
NOTE: Check pinion bearing preload, side play and then ring gear
runout, in this order, before disassembling differential
assembly.
Disassembly
1) Remove axle shafts. See AXLE SHAFT & BEARING under REMOVAL
& INSTALLATION. 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 if front pinion
bearing will be replaced.
2) To check side play, place pry bar between differential
carrier and axle housing. Pry differential carrier to one side and
note if any side play exists. No side play should exist. If side play
exists, remove bolt and adjuster lock. See Fig. 1. Using Adjuster
Rotator (C-4164), tighten adjuster to eliminate side play.
3) To check ring gear runout, install dial indicator on axle
housing at 90 degree angle to ring gear, with stem resting against
flat side of ring gear, opposite gear teeth. Rotate ring gear, and
note ring gear runout.
NOTE: Ring gear must be removed from differential carrier before
checking differential carrier flange runout. Differential
carrier and bearings must be reinstalled in axle housing to
check differential carrier flange runout.
4) Mark ring gear and differential carrier at point of
maximum ring gear runout for reassembly reference. If ring gear runout
does not exceed .005" (.13 mm), differential carrier and ring gear are\
okay. If ring gear runout exceeds .005" (.13 mm), check differential
carrier flange runout once ring gear is removed.
5) Remove brake sensor from top of axle housing (if
equipped). Mark bearing caps and axle housing for reassembly
reference.
CAUTION: Mark all bearing races and adjusters in relation to their

TESTING
NOTE: Trac-Lok differential can be tested without removing
differential case from axle housing.
1) Place blocks under both front wheels. Ensure engine is off
and transmission is in Neutral. Release parking brake. Raise one rear
wheel until it is completely clear of the floor. Remove wheel. Install
Adapter (6790) to wheel studs and tighten securely.
2) Using torque wrench on adapter, rotate axle and record
torque required. Repeat procedure for remaining rear wheel position.
If rotational torque for either rear wheel is less than 30 ft. lbs.
(40.1 N.m) or greater than 200 ft. lbs. (271 N.m), Trac-Lok unit mus\
t
be replaced or repaired.
REMOVAL & INSTALLATION
Servicing procedure is same as that used for standard
differential. See RBI FULL FLOATING AXLES article for servicing
procedures.
OVERHAUL
DIFFERENTIAL CARRIER
Disassembly
1) Place appropriate side gear holding tool in soft-jaw vise.
Position differential carrier on holding tool. Remove ring gear, if
necessary. Ring gear removal is only necessary when ring gear is being
replaced.
2) Remove roll pin holding pinion mate shaft into housing.
Remove pinion gear mate shaft. A drift and hammer can be used if
necessary. See Fig. 1.
3) Install appropriate Step Plate on lower side gear. Install
appropriate threaded forcing screw into upper side gear. See Fig. 2.
4) Thread Forcing Screw into threaded adapter disc until
forcing screw is centered in threaded adapter disc. Perform STEP 1
shown in illustration. See Fig. 2.
5) Place small screwdriver in slot of threaded adapter disc
to prevent disc from rotating. Tighten forcing screw to relieve
tension from clutch pack.
6) Remove pinion gear thrust washers. Loosen forcing screw to
release pressure from clutch pack. Install appropriate turning bar in
hole on side of differential case. Perform STEP 2 shown in
illustration. See Fig. 2.
7) Using turning bar, rotate differential case until pinion
gears can be removed. Remove pinion gears. Remove turning bar, forcing
screw, step plate, and threaded adapter disc from differential case.
8) Remove upper side gear and clutch pack. See Fig. 1. Remove
differential case from axle shaft. Remove remaining side gear and
clutch pack from differential case.
CAUTION: Mark clutch pack location for reassembly reference. Note
position of clutch pack components before removing clutch
pack retainers. Clutch packs must be assembled in correct
order and installed in original location.
9) Remove clutch pack retainers from clutch pack. Keeping
clutch pack components in correct order, disassemble clutch pack.

horizontally, and clamp straightedge to yoke in a horizontal plane.
Repeat procedure with drive pinion flange. Ensure flange/yokes are
horizontal by checking angle of straightedge using a machinist spirit
level.
4) Measure distance "X" at each side. See Fig. 9. If
measurements are not within 1/16" (1.6 mm) of each other, transmission\
flange is horizontally misaligned.
5) Measure distance "Y" (edge of straightedge to axle shaft
center line) at each side. If measurements are not within 1/8" (3.2
mm) of each other, axle housing is misaligned. Measure distance "W" at
each side. If measurements are not within 1/16" (1.6 mm) of each
other, pinion flange is horizontally misaligned.
ADJUSTING HORIZONTAL ALIGNMENT
NOTE: Excessive difference in measurements may indicate frame
damage. DO NOT attempt to use following correction procedure
if more than slight horizontal misalignment exists.
Minor adjustment of drive shaft horizontal alignment may be
made by loosening axle housing "U" bolts and moving either side of
axle housing forward or backward. If frame is not bent, slight axle
movement should make "W" measurements equal. See Fig. 9.
REMOVAL & INSTALLATION
CENTER BEARING SUPPORT ASSEMBLY
Removal
1) With transmission in neutral and parking brake off, raise
vehicle. Scribe alignment marks on all flange/yokes and slip joints to
be disassembled or disconnected. Remove drive shaft from pinion
flange/yoke.
2) Slide rear drive shaft slip joint from front drive shaft
splines. See Fig. 10. Support drive shaft(s) while removing center
bearing support bracket mounting bolts. Pull to remove front drive
shaft slip joint from transmission extension housing shaft.
Fig. 10: Identifying Center Bearing Support Assembly Components
Courtesy of Chrysler Corp.
CAUTION: DO NOT clamp drive shaft tube or slip joint tube in a vise.
Clamp only forged portion of each yoke in vise. To avoid

4) To install, reverse removal procedure. Ensure heater
housing top cover seal, firewall and side cowl seals are in good
condition.
Fig. 7: Removing Radiator Support Assembly (Ram Van/Wagon)
Courtesy of Chrysler Corp.
HEATER CONTROL PANEL R & I
Removal & Installation (Dakota & Durango)
1) Disconnect negative battery cable. On models equipped with
A/T, unlock ignition switch. Set parking brake and place gear selector
lever in "L" position. If equipped, set tilt steering column in lowest
position.
2) On all models, carefully pry bezel away from instrument
panel to disengage clips. Unplug connectors from cigarette lighter and
auxiliary power outlet. Disconnect fog light switch (if equipped).
Remove 4 heater control panel bolts.
3) Pull control panel outward enough to disconnect wiring
connector, vacuum harness and temperature control cable. Remove heater
control panel. To install, reverse removal procedure. Adjust
temperature control cable. See TEMPERATURE CONTROL CABLE ADJUSTMENT .
Removal & Installation (Ram Pickup)
1) Disconnect negative battery cable. Reach under driver's