1999 DODGE RAM brake

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

VEHICLE SPEED SENSORS
VENTS
VIBRATION DAMPERS
WHEEL ATTACHMENT HARDWARE
WHEEL SPEED SENSORS
WIRING HARNESSES AND CONNECTORS
YOKES AND SLIP YOKES
INTRODUCTION TO MOTORIST ASSURANCE PROGRAM (MAP)
OVERVIEW OF MOTORIST ASSURANCE PROGRAM
The Motorist Assurance Program is the consumer outreach
effort of the Automotive Maintenance and Repair Association, Inc.
(AMRA). Participation in the Motorist Assurance Program is drawn from
retailers, suppliers, independent repair facilities, vehicle
manufacturers and industry associations.
Our organization's mission is to strengthen the relationship
between the consumer and the auto repair industry. We produce
materials that give motorists the information and encouragement to
take greater responsibility for their vehicles-through proper,
manufacturer-recommended, maintenance. We encourage participating
service and repair shops (including franchisees and dealers) to adopt
(1) a Pledge of Assurance to their Customers and (2) the Motorist
Assurance Program Standards of Service. All participating service
providers have agreed to subscribe to this Pledge and to adhere to the
promulgated Standards of Service demonstrating to their customers that
they are serious about customer satisfaction.
These Standards of Service require that an inspection of the
vehicle's (problem) system be made and the results communicated to the\
customer according to industry standards. Given that the industry did
not have such standards, the Motorist Assurance Program successfully
promulgated industry inspection communication standards in 1994-95 for
the following systems: Exhaust, Brakes, ABS, Steering and Suspension,
Engine Maintenance and Performance, HVAC, and Electrical Systems.
Further, revisions to all of these inspection were recently published.
Further, revisions to all of these inspection communication standards
are continually republished. In addition to these, standards for Drive
Train and Transmissions have recently been promulgated. Participating
shops utilize these Uniform Inspection & Communication Standards as
part of the inspection process and for communicating their findings to
their customers.
The Motorist Assurance Program continues to work
cooperatively and proactively with government agencies and consumer
groups toward solutions that both benefit the customer and are
mutually acceptable to both regulators and industry. We maintain the
belief that industry must retain control over how we conduct our
business, and we must be viewed as part of the solution and not part
of the problem. Meetings with state and other government officials
(and their representatives), concerned with auto repair and/or
consumer protection, are conducted. Feedback from these sessions is
brought back to the association, and the program adjusted as needed.
To assure auto repair customers recourse if they were not
satisfied with a repair transaction, the Motorist Assurance Program
offers mediation and arbitration through MAP/BBB-CARE and other non-
profit organizations. MAP conducted pilot programs in twelve states
before announcing the program nationally in October, 1998. During the
pilots, participating repair shops demonstrated their adherence to the
Pledge and Standards and agreed to follow the UICS in communicating
the results of their inspection to their customers. To put some
"teeth" in the program, an accreditation requirement for shops was
initiated. The requirements are stringent, and a self-policing method

has been incorporated which includes the "mystery shopping" of
outlets.
We welcome you to join us as we continue our outreach... with
your support, both the automotive repair industry and your customers
will reap the benefits. Please visit MAP at our Internet site www.
motorist.org or contact us at:
1444 I Street, NW Suite 700
Washington, DC 20005
Phone (202) 712-9042 Fax (202) 216-9646
January 1999
MAP UNIFORM INSPECTION GENERAL GUIDELINES
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
It is MAP policy that all exhaust, brake, steering,
suspension, wheel alignment, drive-line, engine performance and
maintenance, and heating, ventilation and air conditioning, and
electrical services be offered and performed under the standards and
procedures specified in these sections.
Before any service is performed on a vehicle, an inspection
of the appropriate system must be performed. The results of this
inspection must be explained to the customer and documented on an
inspection form. The condition of the vehicle and its components will
indicate what services/part replacements may be "Required" or
"Suggested". In addition, suggestions may be made to satisfy the
requests expressed by the customer.
When a component is suggested or required to be repaired or
replaced, the decision to repair or replace must be made in the
customer's best interest, and at his or her choice given the options
available.
This section lists the various parts and conditions that
indicate a required or suggested service or part replacement.
Although this list is extensive, it is not fully inclusive. In
addition to this list, a technician may make a suggestion. However,
any suggestions must be based on substantial and informed experience,
or the vehicle manufacturer's recommended service interval and must be
documented.
Some conditions indicate that service or part replacement is
required because the part in question is no longer providing the
function for which it is intended, does not meet a vehicle
manufacturer's design specification or is missing.
Example:
An exhaust pipe has corroded severely and has a hole
in it through which exhaust gases are leaking. Replacement
of the exhaust pipe in this case is required due to
functional failure.
Example:
A brake rotor has been worn to the point where it measures
less than the vehicle manufacturer's discard specifications.
Replacement of the rotor is required because it does not meet
design specifications.
Some conditions indicate that a service or part replacement
is suggested because the part is close to the end of its useful life
or addresses a customer's need, convenience or request. If a
customer's vehicle has one of these conditions, the procedure may be
only to suggest service.

CLUTCH LINKAGES (MECHANICAL)
See LINKAGES (EXTERNAL) .
CLUTCH MASTER CYLINDERS
CLUTCH MASTER CYLINDER INSPECTION








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Condition Code Procedure
Cover gasket distorted .. A .... Require replacement of cover
gasket.
Cover gasket gummy ...... A .... Require replacement of cover
gasket.
Cylinder leaking fluid
from rear of bore ...... A .. Require repair or replacement.
Cylinder leaking fluid
internally ............. A ............ Require replacement.
Dust boot missing ....... C ..... Require replacement of dust
boot.
Dust boot punctured ..... A ..... Require replacement of dust
boot.
Dust boot torn .......... A ..... Require replacement of dust
boot.
Fluid level incorrect ... B . Require fluid level adjustment.
Housing damaged, affecting
performance ............ A .. Require repair or replacement.
Master cylinder has
residue in reservoir
(make parallel w/brakes
when they are done) .... 2 .......... ( 1) Further inspection
required.
Threads damaged ......... A ...... Require repair replacement
Threads stripped (threads
missing) ............... A ............ Require replacement.
( 1) - DO NOT replace master cylinder unless it exhibits
conditions listed for replacement. You may suggest fluid
change according to OEM service intervals.









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CLUTCH PEDALS
CLUTCH PEDAL INSPECTION








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Condition Code Procedure
Bent, affecting
performance ............ A .. Require repair or replacement.
Broken .................. A .. Require repair or replacement.
Pedal pad missing ....... C .......... Require replacement of
pedal pad.
Pivot bushings worn,
affecting performance .. A .... Require replacement of pivot
bushings.









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CLUTCH PIVOTS
CLUTCH PIVOT INSPECTION








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CIRCUIT PROTECTION DEVICES









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Component Component Location








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Circuit Breakers In junction block.
Junction Block Left end of dash.
Power Distribution Center In engine compartment, on left
inner fender panel, near
battery.









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CONTROL UNITS









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Component Component Location








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Air Bag Control Module Behind lower center of dash.
Controller Anti-Lock Brake (4WABS) Engine compartment, mounted on\
top of hydraulic control unit.
Controller Anti-Lock Brake (RWAL) In engine compartment, on left\
front inner fender.
Daytime Running Lamp (DRL) Module In engine compartment, on left\
inner fender panel.
Engine Control Module (Diesel) On left side of engine, behind\
fuel filter.
Fuel Pump Module Top of fuel tank.
Integrated Electronic Module Left side of dash, inboard of
steering column opening.
Powertrain Control Module (PCM) In engine compartment, on
right side of firewall.
Seat Belt Control Module Under front seat center
cushion.









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MOTORS









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Component Component Location








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Blower Motor Behind right side of dash.
Fuel Injection Pump (Diesel) On left side of engine, on
rear of timing gear housing.
Fuel Transfer Pump (Diesel) On left side of engine, below
and rearward of fuel filter.

Back-Up Lamp Switch On left side of transmission.
Brake Pressure Switch On combination valve.
Clutch Pedal Position Switch On clutch master cylinder
pushrod.
Low Washer Fluid Level Switch On side of washer fluid
reservoir.
Park Brake Switch On park brake mechanism.
Park/Neutral Position Switch
(A/T) On left side of transmission.
Seat Belt Switch Above left rear speaker.

Stoplight Switch On brake pedal bracket.








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MISCELLANEOUS









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Component Component Location








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Blower Motor Resistor Block Behind right side of dash, on
A/C-heater housing.
Data Link Connector (DLC) Left bottom of dash.
Fuel Heater (Diesel) In top of fuel filter housing.
Ignition Coil 4-Pack & 6-Pack Right side of engine.