tire pressure DODGE RAM 1999 Service Repair Manual

Refrigerant R-12 based systems use mineral oil, while R-134a
systems use synthetic Polyalkylene Glycol (PAG) oils. Using a mineral
oil based lubricant with R-134a will result in A/C compressor failure
due to lack of proper lubrication.
Following are the most common R-134a refrigerant oils used by
most domestic vehicles:
Chrysler Corp., Eagle & Jeep
Use ND-8 PAG oil, SUN PAG 56 oil, SP-10 PAG Oil, or SP-20 PAG
oil.
Ford Motor Co.
Use YN-12B or YN-12C PAG Refrigerant Oil (specification WSH-
M1C231-B) or SP-20 PAG Oil (specification WST-M1C231-B2).
General Motors
On all models except Saturn, use PAG Refrigerant Oil (Part
No. 12345923). On Saturn, use Saturn PAG refrigerant oil.
NOTE: PAG oil absorbs moisture very rapidly, 2.3-5.6 percent by
weight as compared to a mineral oil absorption rate of .005
percent by weight.
NOTE: Use ONLY the specified oil for the appropriate system or A/C
compressor. Always check the underhood A/C specification
label or A/C compressor label before adding refrigerant oil
to A/C system.
SYSTEM SERVICE VALVES
SCHRADER-TYPE VALVES
NOTE: Although similar in construction and operation to a tire
valve, NEVER replace a Schrader-type valve with a tire
valve.
Schrader valve is similar in construction and operation to a
tire valve. See Fig. 4. When a test gauge hose is attached (hose has
built-in valve core depressor), Schrader stem is pushed inward to the
open position and allows system pressure to reach the gauge.
If test hose being used does not have a built-in core
depressor, an adapter must be used. Never attach hoses or adapters to
a Schrader valve unless it is first connected to manifold gauge set.
Fig. 4: Schrader Service Valve (Compressor Location Shown)
SPECIAL VALVE CONNECTORS
On some General Motors models, thread size on high-side

Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Binding, affecting
performance ............ A .. Require repair or replacement.
Binding, not affecting
performance ............ 2 .. Suggest repair or replacement.
Broken .................. A .. Require repair or replacement.
Burned, affecting
performance ............ A ........... (1) Require repair or
replacement.
Burned, not affecting
performance ............ 2 ........... ( 1) Suggest repair or
replacement.
Cracked, affecting
performance ............ A .. Require repair or replacement.
Cracked, not affecting
performance ............ 1 .. Suggest repair or replacement.
Float saturated ......... A ............ Require replacement.
Leaking ................. A .. Require repair or replacement.
Malfunctioning .......... A ........... ( 2) Require repair or
replacement.
Melted, affecting
performance ............ A ........... ( 1) Require repair or
replacement.
Melted, not affecting
performance ............ 2 ........... ( 1) Suggest repair or
replacement.
Missing ................. C ............ Require replacement.
Out of adjustment ....... B .. Require repair or replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal burned, affecting
performance ............ A ........... ( 1) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting
performance ............ B .. Require repair or replacement.
Terminal loose, not
affecting performance .. 1 .. Suggest repair or replacement.
Won't return ............ A .. Require repair or replacement.
Worn .................... 1 ............ Suggest replacement.
( 1) - Determine cause and correct prior to repair or
replacement of part.
( 2) - Includes inoperative, intermittent operation, or failure to
perform all functions.









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TIRES
Consult the vehicle owner's manual or vehicle placard for
correct size, speed ratings, and inflation pressure of the original
tires.
TIRE INSPECTION

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Condition Code Procedure
Tire diameter incorrect,
affecting ABS or TCS ... A ............ Require replacement.
Tire pressure incorrect,
affecting ABS or TCS ... A .. Require repair or replacement.
Tire size incorrect,
affecting ABS or TCS ... A ............ Require replacement.









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TOOTHED RINGS (TONE WHEEL)
NOTE: Copied from Drivetrain UIGs.
If the toothed ring requires replacement and cannot be
replaced as a separate component, replace the assembly of which the
ring is a part.
TOOTHED RING INSPECTION









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Condition Code Procedure
Alignment incorrect ..... B ............... Require repair or
replacement.
Bent .................... B ............ Require replacement.
Contaminated, affecting
performance ............. A ........ Require repair. Identify
and correct cause.
Cracked ................. B ............ Require replacement.
Loose ................... A ............. Require replacement
of worn parts.
Missing ................. C ............ Require replacement.
Number of teeth
incorrect .............. B ............ Require replacement.
Teeth broken ............ A ............ Require replacement.
Teeth damaged, affecting
performance ............ A ............ Require replacement.









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VACUUM BOOSTERS
VACUUM BOOSTER INSPECTION








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Condition Code Procedure
Applies too much assist
(oversensitive) ........ A ............ Require replacement.
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.
Auxiliary vacuum pump
inoperative ............ A ........... ( 1) Require repair or
replacement.
Check valve grommet
deteriorated, affecting
performance ............ A .. Require replacement of grommet.

TEST II
1) Drive vehicle until differential lubricant is at normal
operating temperature. Place a piece of Kraft paper over a smooth
Formica board. Place Formica board with Kraft paper under one rear
wheel. Rear wheel should be centered on board on level surface.
2) Block one front tire with a 2" high by 3" wide wooden
block. Start vehicle. With gradual throttle pressure, attempt to
slowly drive vehicle over wooden block.
3) If Kraft paper slips out from under rear wheel before
vehicle drives over wooden block, move Formica board and Kraft paper
under the other rear wheel.
4) With gradual throttle pressure, attempt to slowly drive
vehicle over wooden block again. If vehicle drives over wooden block
with Formica and Kraft paper under either rear wheel, drive axle is
functioning properly.
REMOVAL & INSTALLATION
Servicing procedure is same as that used for a standard
differential. See appropriate RBI FULL-FLOATING AXLES article for
servicing procedures.
OVERHAUL
DIFFERENTIAL CARRIER
CAUTION: Mark all component locations for reassembly reference. Note
position of clutch pack components before removal. Install
clutch pack components in correct order and original
locations.
Disassembly
1) Place reference mark on differential case lower half and
upper half for reassembly reference. Also place reference mark on
pinion cross shaft and differential case lower half for reassembly
reference.
2) Remove differential case half retaining bolts. Remove
differential case upper half. Remove components from differential case
lower half. See Fig. 1.
Fig. 1: Exploded View Of Power-Lok Differential
Courtesy of Chrysler Corp.
Cleaning & Inspection
Clean components with solvent, and dry with compressed air.

IGNITION SWITCHES
INDICATOR LIGHTS
KEYLESS ENTRY KEYPADS AND TRANSMITTERS
KEYLESS ENTRY TRANSMITTERS
LEDS
LENSES
MICROPHONES
MIRRORS (ELECTROCHROMATIC AND HEATED)
MOTORS
NEUTRAL SAFETY SWITCHES
ODOMETERS
ODOMETERS, SPEEDOMETERS AND TACHOMETERS (CABLE-DRIVEN)
PULLEYS
RECEIVERS, AMPLIFIERS, EQUALIZERS AND SUB-WOOFER VOLUME CONTROLS
RELAY BOXES
RELAYS
SEALED BEAMS
SEAT HEATERS
SECURITY ALARM SENSORS
SIRENS
SOLENOIDS
SPEAKERS AND MICROPHONES
SPEEDOMETER AND TACHOMETER LINKAGES AND CABLES
SPEEDOMETER CABLES
SPEEDOMETERS
STARTERS
SUB-WOOFER VOLUME CONTROLS
SWITCHES
TACHOMETER CABLES
TACHOMETERS
TAPE PLAYERS AND CD PLAYERS
TENSIONERS
TIMERS
TIRE PRESSURE SENSORS
TRANSCEIVERS
TRANSDUCERS
VACUUM ACCUMULATORS (RESERVOIRS)
VACUUM RESERVOIRS
VOLTAGE REGULATORS
WASHER FLUID LEVEL SENDERS
WASHER PUMPS
WIPER ARMS AND BLADES
WIPER BLADES
WIPER HOSES AND NOZZLES
WIPER LINKAGES
WIPER NOZZLES
WIPER PUMP RESERVOIRS
WIRING HARNESSES AND CONNECTORS
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,

(2) - Inoperative includes intermittent operation or out of OEM
specification.









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TIRE PRESSURE SENSORS
TIRE PRESSURE SENSOR INSPECTION








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Condition Code Procedure
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.
Inoperative ............. A ........... ( 1) Require repair or
replacement.
Loose ................... A .. Require repair or replacement.
Missing ................. C ............ Require replacement.
( 1) - Inoperative includes intermittent operation or out of OEM
specification.









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TRANSCEIVERS
TRANSCEIVER INSPECTION








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Condition Code Procedure
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.
Connector broken ........ A .. Require repair or replacement.
Connector melted ........ A ........... ( 1) Require repair or
replacement.
Connector missing ....... C ............ Require replacement.
Malfunctioning .......... A ........... ( 2) Require repair or
replacement.
Missing ................. C ............ Require replacement.
Sound quality poor ...... A ........... ( 3) Require repair or
replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal burned, affecting
performance ............ A ........... ( 1) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting

Limited Slip









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Differential  Model 248 (4WD)  7.3 Pts. (3.4L) 












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 Model 267 (2WD)  7 Pts. (3.3L) 












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 Model 267 (4WD)  7.8 Pts. (3.6L) 












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 Model 286 (2WD)  6.8 Pts. (3.2L) 












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 Model 286 (4WD)  10.1 Pts. (4.8L) 











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Front Axle  Model 216  6.8 Pts. (3.6L) 

Lubricant










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 Model 248  7.6 Pts. (3.6L) 











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Transfer Case NV231 HD  2.5 Pts. (1.2L) 

Fluid   











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Power Take  NV021  4.6 Pts. (2.1L) 

Off Adapter   











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Power  Drained  2.7 Pts. (1.3L) 

Steering   

Fluid   











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A/C  Charge Capacity  32 Oz. (.9Kg) 

Refrigerant   

  











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Refrigerant  A/C System Capacity  7.75 Oz. (230ML) 

Oil   











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Fuel Tank 119" & 139" Wheelbase Vehicles 26 Gal. (98L) 












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 All Others  35 Gal. (132L) 











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(
1) - Capacities are recommended or calculated levels. Always use 

dipstick (if available) to measure level. 










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WHEEL & TIRE SPECIFICATIONS
TIRE REPLACEMENT
The tires on your new vehicle provide a balance of many
characteristics. They should be inspected regularly for wear and
correct inflation pressure. Chrysler strongly recommends that you use
tires equivalent to the originals in quality and performance when
replacement is needed. Failure to use equivalent replacement tires may
adversely affect the safety, handling and ride of your vehicle. We
recommend that you contact your original equipment tire dealer on any
questions you may have on tire specifications or capability.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE








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Lug Nut Ft. Lbs. (N.m)
BR1500 (5 Stud Wheel) ........................... 95 (130)
BR2500 (8 Stud Wheel) ........................... 135 (180)

CAUTION: Disconnect negative battery cable before servicing any air
bag system, steering column or passenger side dash
component. After any repair, turn ignition key to the ON
position from passenger's side of vehicle in case of
accidental air bag inflation
AIR CONDITIONING SERVICING
WARNING: Avoid breathing R-134a refrigerant and PAG lubricant vapors,
exposure may irritate eyes, nose and throat. To remove
R-134a from system use R-134a recycling equipment that meets
SAE J2210 specifications. If accidental system discharge
occurs, ventilate work area before resuming service.
WARNING: R-134a service equipment or vehicle A/C systems SHOULD NOT
be pressure tested or leak tested with compressed air. Some
mixtures of air/R134a have shown to be combustible at
elevated pressures. These mixtures are dangerous and may
cause fire and/or explosions. See AIR CONDITIONING SERVICE
article in GENERAL INFORMATION section.
AIR CONDITIONING MAINTENANCE
WARNING: NEVER add A/C refrigerant to correct a non-cooling problem
unless pressure gauges are connected to the system by a
certified technician. Lack of cooling may be caused by a
restriction, therefore adding refrigerant can cause a
dangerous pressure rise.
ANTI-LOCK BRAKE SYSTEM
CAUTION: The anti-lock brake system contains electronic equipment that
can be susceptible to interference caused by improperly
installed or high output radio transmitting equipment. Since
this interference could cause the possible loss of the
antilock braking capability, such equipment should be
installed by qualified professionals.
On models equipped with anti-lock brake systems, ALWAYS
observe the following cautions:
* DO NOT attempt to bleed hydraulic system without first
referring to the appropriate ANTI-LOCK BRAKE SYSTEM article
in the BRAKES Section.
* DO NOT mix tire sizes. As long as tires remain close to the
original diameter, increasing the width is acceptable.
Rolling diameter must be identical for all 4 tires. Some
manufacturers recommend tires of the same brand, style and
type. Failure to follow this precaution may cause inaccurate
wheel speed readings.
* Use ONLY recommended brake fluids. DO NOT use silicone brake
fluids in an ABS-equipped vehicle.
AUTOMATIC TRANSAXLE FLUID SERVICE
WARNING: Make certain no fluid is spilled when the transaxle fluid
is inspected. Wipe up any spilled fluid completely.
AXLE FLUID
CAUTION: Axle lubricant should be changed whenever the axle has

N - R EM OVE /IN STA LL/O VER HAU L
under FUEL SYSTEM. Disconnect negative battery cable. Ensure disconnect fitting and fuel lines are clean. Note location of releasetab and pull tab on disconnect fitting. See Fig. 24.
CAUTION: Release tab must be pressed downward before removing pull
tab, or pull tab will be damaged. 2) Press release tab downward. Use screwdriver to pry pull tab upward until pull tab separates from disconnect fitting. Removedisconnect fitting from fuel line. Inspect components for damage. Ifdisconnect fitting is damaged, entire assembly must be replaced, asonly pull tab may be replaced. 3) To install, ensure fuel line and disconnect fitting areclean. Lubricate fuel line and disconnect fitting with engine oil.Install disconnect fitting on fuel line until disconnect fittingbottoms on fuel line. 4) Install NEW pull tab until pull tab locks in disconnectfitting. DO NOT reuse old pull tab. Pull on fuel line and disconnectfitting to ensure components are properly locked together. Reconnectnegative battery cable. Start engine and check for leaks. Removal & Installation (Dual Tab)
1) Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE under FUEL SYSTEM. Disconnect negative battery cable. Ensuredisconnect fitting and fuel lines are clean. Note location of tabs ondisconnect fitting. See Fig. 24.
2) Squeeze both tabs against disconnect fitting. Pulldisconnect fitting from fuel line. The plastic retainer will remain onthe fuel system component being serviced. The "O" rings and spacerwill remain in the disconnect fitting. 3) Inspect components for damage. If disconnect fitting isdamaged, entire assembly must be replaced. The only component that maybe replaced is the plastic retainer. If plastic retainer must beremoved from fuel system component, carefully release the plasticretainer from the fuel system component using 2 screwdrivers. Inspectplastic retainer for cracks or damage. Replace plastic retainer ifdefective. 4) To install, ensure fuel line and disconnect fitting areclean. Lubricate fuel line and disconnect fitting with engine oil.Install disconnect fitting on fuel line until click sound is heard. 5) Pull on fuel line and disconnect fitting to ensurecomponents are properly locked together. Reconnect negative batterycable. Start engine and check for leaks. Removal & Installation (Plastic Retainer Ring)
1) Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE under FUEL SYSTEM. Disconnect negative battery cable. Ensuredisconnect fitting and fuel lines are clean. Note location of plasticretainer ring on disconnect fitting. See Fig. 24.
NOTE: Plastic retainer ring must be pressed evenly into disconnect fitting. If plastic retainer is not even, it will be difficult to remove disconnect fitting from fuel line. 2) Firmly push disconnect fitting toward the fuel line while pushing plastic retainer ring evenly into disconnect fitting. Withplastic retainer ring fully depressed, pull disconnect fitting fromfuel line. 3) Inspect components for damage. If disconnect fitting isdamaged, entire assembly must be replaced. 4) To install, ensure fuel line and disconnect fitting areclean. Lubricate fuel line and disconnect fitting with engine oil.Install disconnect fitting on fuel line until click sound is heard.

5) Pull on fuel line and disconnect fitting to ensure
components are properly locked together. Reconnect negative battery
cable. Start engine and check for leaks.
FUEL LINE AT FUEL RAIL
Removal & Installation (Dakota, Durango & Ram Pickup)
1) Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE
under FUEL SYSTEM. Disconnect negative battery cable.
2) Ensure area around fuel line fitting on fuel line and fuel
rail is clean. Using screwdriver, pry latch clip from fuel line
fitting and fuel rail while sliding latch clip toward fuel rail.
Perform STEP 1. See Fig. 25.
3) Insert Fuel Line Remover (Snap-On FIH-9055-1) into fuel
line fitting to release locking fingers inside fuel line fitting.
Perform STEP 2. See Fig. 25. Pull fuel line fitting with fuel line
from fuel rail.
4) Inspect fuel line fitting components for damage. If fuel
line fitting components are damaged, entire fuel line assembly must be
replaced.
5) To install, ensure fuel line fitting and fuel rail are
clean. Lubricate fuel line fitting and fuel rail with engine oil.
Install fuel line fitting on fuel rail until click sound is heard.
6) Install latch clip. Ensure latch clip snaps into position.
If latch clip will not fit properly, check for improper installation
of fuel line fitting on fuel rail. Pull on fuel line to ensure fuel
line fitting is properly locked on fuel rail. Reconnect negative
battery cable. Start engine and check for leaks.
Fig. 25: Disconnecting Fuel Line At Fuel Rail (Dakota, Durango &
Ram Pickup)
Courtesy of Chrysler Corp.
Removal & Installation (Ram Van & Ram Wagon)