1999 DODGE RAM oil type

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.

distorting yoke, DO NOT overtighten vise jaws.
Disassembly
1) Clamp front drive shaft in a soft-jaw vise. If required,
disassemble "U" joint from yoke to access yoke-to-drive shaft
retaining bolt. Scribe mark yoke or slip joint to drive shaft for
reassembly reference. Slide yoke or slip joint off shaft splines.
2) Remove and retain center bearing support bracket and
retainer. (Service replacement assembly may not come with these items.
) Remove rubber insulator from bearing housing. See Fig. 10.
3) Bend slinger away from center bearing to provide clearance
for bearing puller. Using bearing puller, remove center bearing from
drive shaft. On some applications, outer bearing cover/cage and balls
must be removed to attach puller to bearing race.
Reassembly & Installation
Install NEW slinger to shaft. Install/press bearing onto
shaft using appropriate tool or tube until bearing is seated to shaft
shoulder. To complete installation, reverse disassembly and removal
procedures. Ensure support bracket angle adjustment shims are
reinstalled (if removed).
OVERHAUL
NOTE: Manufacturer recommends replacing "U" joint(s) whenever "U"
joint is disassembled from yoke. ALWAYS replace complete "U"
joint whenever extreme external lubrication leakage or
bearing cap damage exists.
Before disassembly, mark flange/yoke to drive shaft for
reassembly reference, and remove "U" joint lube fitting(s). If joints
are rusted or corroded, apply penetrating oil before pressing bearing
caps out of yoke or off "U" joint trunnion pin.
SINGLE CARDAN "U" JOINTS
Other than adding grease, "U" joint assembly items are not
individually serviceable or repairable. If needle bearings, seals,
spider, or bearing caps are found to be defective, damaged or
excessively worn, complete "U" joint must be replaced.
NOTE: Saturate bearing caps and yokes with penetrating oil before
removal.
Removal
Raise and support vehicle. Remove drive shaft. Remove inner
or outer type bearing cap retainer clips. See Fig. 11. Press bearing
caps from yokes. Remove bearings, seals and spider from yoke bore, and
discard.
Cleaning
Clean yoke bores using solvent and wire brush or crocus
cloth. Remove rust, corrosion and foreign matter from yoke bores.
Installation
1) Apply multipurpose lubricant (NLGI grade 2 EP) to yoke
bores and into needle bearings of each bearing cap. Position spider in
yoke bores.
2) Install seals onto spider trunnions or bearing caps.
Lightly tap bearing caps into yoke bore far enough to retain spider in
place.

FLANGES
FLEX PLATES
FLUID LEVEL INDICATORS
FLUIDS AND LUBRICANTS
FLYWHEELS
FORCE MOTORS
GUIDES
HALF SHAFTS
HOSES, LINES AND TUBES
HOUSINGS (BELL, CASE, TAIL (EXTENSION) AND AUXILIARY)
INTERMEDIATE SHAFT SUPPORT BEARINGS
KEY INTERLOCK SYSTEMS
LIMITED SLIPS
LINES
LINKAGES (EXTERNAL)
LOCKING HUB ASSEMBLIES
LOCKING HUB CONTROL KNOBS
LUBRICANTS
METAL-CLAD SEALS
METALASTIC JOINTS
MODULATOR PINS
MODULATORS
MOUNTS (ENGINE, TRANSAXLE AND TRANSMISSION)
ODOMETER DRIVES (MECHANICAL)
ODOMETER HEADS (MECHANICAL)
OIL PANS
PANS
PILOT HOLES
PRESSURE PLATES
PRESSURE SWITCHES
RACES
RUBBER JOINTS (METALASTIC)
SCREENS
SEALS
SEALS (METAL-CLAD)
SELECTOR INTERLOCK SYSTEMS
SERVOS
SHIFT INTERLOCK SYSTEMS (SELECTOR AND KEY INTERLOCK SYSTEMS)
SENSORS
SIDE COVERS
SLIP YOKES
SOLENOIDS
SPEED SENSORS (ELECTRONIC WHEEL AND VEHICLE)
SPEEDOMETER-DRIVEN GEAR HOUSINGS
SPEEDOMETER/ODOMETER DRIVES (MECHANICAL)
SPEEDOMETER/ODOMETER HEADS (MECHANICAL)
SPEEDOMETERS AND ODOMETERS (ELECTRONIC)
SWITCHES
TONE WHEELS
TOOTHED RINGS (TONE WHEELS)
TORQUE CONVERTERS
TRANSAXLE MOUNTS
TRANSDUCERS (TRANSMISSION)
TRANSMISSION COOLERS
TRANSMISSION MOUNTS
TRANSMISSION PANS
TRANSMISSION RANGE INDICATORS (PRNDL)
TUBES
UNIVERSAL JOINTS (CARDON OR CROSS TYPE)
VACUUM CONTROLS
VACUUM HOSES
VACUUM MOTORS
VACUUM-OPERATED SWITCHES

is to be serviced, slowly loosen inlet side of fuel fill tube fitting
at check valve. It is normal for approximately 25 psi of residual
natural gas pressure to flow from loosened fitting. At this point, all
fuel tubes are purged of natural gas between fuel cylinders and
engine. It is now okay to open fuel system.
WARNING: Fuel cylinders still contain high-pressure fuel.
Compressed Natural Gas Fuel Cylinder Purging (5.2L)
1) Open manual shutoff valve. Open only fuel control valve(s)\
(counterclockwise) on fuel cylinder(s) to be serviced. Close all oth\
er
control valve(s) (clockwise) on fuel cylinder(s) not being service\
d.
2) Start and operate engine until it runs out of fuel.
Attempt 3 more engine starts. At this point, all fuel tubes and opened
cylinders are purged of natural gas between fuel cylinders and engine.
It is now okay to open fuel system.
WARNING: Fuel cylinders not being serviced still contain high-pressure
fuel.
FUEL LINE DISCONNECT FITTINGS
Removal & Installation (Tab Type Fitting)
1) Release fuel pressure. See FUEL PRESSURE RELEASE.
Disconnect negative battery cable. Ensure area around fuel line and
disconnect fitting is clean. Place shop towel around fuel line.
2) On 2-tab connectors, squeeze retainer tabs together and
pull fuel tube/quick-connect fitting assembly off of fuel tube nipple.
On single-tab connectors, use screwdriver to pry up pull tab. See
Fig. 1 . Raise pull tab until it separates from quick-connect fitting.
Discard old pull tab. Disconnect quick-connect fitting from fuel line.
CAUTION: DO NOT install a quick-connect fitting without retainer being
either in fuel tube or already in quick-connect fitting.
After installing fuel line in disconnect fitting, pull on
fuel line and disconnect fitting to ensure fuel line is
locked in place.
3) To install, coat fuel tube nipple with clean 30W engine
oil. Insert quick-connect fitting into fuel tube until stop on fuel
tube rests against back of quick-connect fitting.
4) On single-tab connectors, obtain NEW pull tab. Push tab
down until it locks into quick-connect fitting. On 2-tab connectors,
firmly pull on fuel tube and fitting to ensure retainer and quick-
connect fitting are locked.
Removal & Installation (Retainer Type Fitting)
1) Release fuel pressure. See FUEL PRESSURE RELEASE.
Disconnect negative battery cable. Ensure area around fuel line and
disconnect fitting is clean. Place shop towel around fuel line.
2) Pull backward on disconnect fitting while depressing
plastic ring into disconnect fitting. See Fig. 2. Separate fuel line
from disconnect fitting.
NOTE: Plastic retainer ring must be pressed squarely into fitting
body. If retainer is cocked during removal, it may be
difficult to disconnect fitting. Use open-end wrench on
shoulder of plastic retainer to ease disconnection.
3) To install, ensure plastic ring is in outward position
(away from disconnect fitting). If plastic ring is in inward position
(toward disconnect fitting), disconnect fitting must be replaced.
4) Lubricate end of fuel line with 30W engine oil. Insert

Fig. 2: Identifying Retainer Type Fuel Line Disconnect Fittings
Courtesy of Chrysler Corp.
ENGINE
Removal (Ram Van/Wagon)
1) Release fuel pressure. See FUEL PRESSURE RELEASE.
Disconnect negative battery cable. Drain cooling system and engine
oil. Remove and discard oil filter.
2) Remove engine cover, air cleaner and oil dipstick.
Discharge A/C system (if equipped) using approved refrigerant
recovery/recycling equipment. Disconnect A/C lines at condenser, and
plug openings. Remove A/C compressor. Disconnect fan shroud.
3) Remove front bumper, grille and support brace. Disconnect
coolant hoses. Remove radiator, condenser and support as an assembly.
4) Remove upper fan shroud. Remove power steering pump with
hoses attached, and set aside. Remove air pump, spark plug wires and
distributor cap. Disconnect necessary electrical wiring, coolant hoses
and vacuum hoses. Disconnect fuel lines. See FUEL LINE DISCONNECT

CYLINDER HEAD
Cylinder Head
Check cylinder head warpage. Repair or replace cylinder head
if warpage exceeds specification. See CYLINDER HEAD table under ENGINE
SPECIFICATIONS.
Valve Springs
1) Check valve spring free length, out-of-square and
pressure. Replace valve spring if not within specification. See VALVES
& VALVE SPRINGS table under ENGINE SPECIFICATIONS.
2) Measure valve spring installed height from bottom of
spring seat (cylinder head surface) to bottom of spring retainer. If
spacers are installed, measure from top of spacer.
3) If height exceeds 1.687" (42.86 mm), install a .066" (1.\
58
mm) thick spacer in cylinder head counterbore to obtain correct
installed spring height. See VALVES & VALVE SPRINGS table.
Valve Stem Oil Seals
Cup-type oil seals are used on all valves. Ensure oversize
valve stem oil seals are used when oversize valves are installed. When
installing valves, DO NOT overcompress valve springs, or damage to
valve stem oil seal may result.
NOTE: DO NOT ream valve guides from standard to maximum oversize in
one step. Ream valve guides to oversize in gradual steps so
guides are reamed true in relation to valve seat. After
reaming valve guides, valve seat runout must be checked.
Valve Guides
Check valve stem oil clearance. Ensure valve stem diameter is
within specification. Valve guide must be reamed for valve with
oversize valve stem if oil clearance exceeds specification. See
CYLINDER HEAD table under ENGINE SPECIFICATIONS. Valves are available
with stems of .015" (.38 mm) and .030" (.76 mm) oversize.
Valve Seat
Check valve seat width and runout. Grind valve seat if not
within specification. See CYLINDER HEAD table under ENGINE
SPECIFICATIONS.
Valves
Ensure valve margin, head diameter and stem diameter are
within specification. See VALVES & VALVE SPRINGS table under ENGINE
SPECIFICATIONS. Valves are available with stems of .015" (.38 mm) and
.030" (.76 mm) oversize.
Valve Seat Correction Angles
Use a 15-degree stone to lower valve seat, and a 60-degree
stone to raise valve seat.
VALVE TRAIN
Rocker Arms & Pivots
Remove rocker arms and pivots. Inspect for wear. Replace as
necessary.
NOTE: Cylinder block must be marked to indicate oversize valve
lifters. See SPECIAL ENGINE MARKS.
Valve Lifters
Measure valve lifter diameter and bore diameter in cylinder

2) Ensure journal diameter, taper and out-of-round are within
specification. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS table
under ENGINE SPECIFICATIONS. Upper main bearings contain oil holes,
while lower bearings installed in main bearing cap do not.
3) Apply light coat of engine oil to threads before
tightening bolt to specification. See TORQUE SPECIFICATIONS table.
Ensure oil clearance and end play are within specification. See
CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS table.
CAUTION: Crankshaft journal grinding should not exceed .012" (.30 mm)
under standard size. DO NOT grind thrust surfaces of No. 3
main bearing. Final paper or cloth polishing after regrind
must be done in same direction as engine rotation.
Thrust Bearing
Thrust bearing is located on No. 3 main bearing. Replace
thrust bearing if crankshaft end play is not within specification. See
CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS table under ENGINE
SPECIFICATIONS.
NOTE: Cylinder bore should be measured at room temperature of 70
F
(21C).
Cylinder Block
1) Check cylinder bore, out-of-round and taper. Measure
cylinder bore diameter below top surface of cylinder bore, middle of
bore and bottom of cylinder bore. Bore cylinder block if bore diameter
is not within specification. See CYLINDER BLOCK table under ENGINE
SPECIFICATIONS.
NOTE: Cylinder block is marked to indicate oversize valve lifters.
See SPECIAL ENGINE MARKS.
2) Check valve lifter bore diameter. Check for scoring. If
scoring exists or lifter bore diameter is not within specification,
ream cylinder block bore for next oversize valve lifter. See VALVE
LIFTERS table under ENGINE SPECIFICATIONS.
ENGINE OILING
ENGINE LUBRICATION SYSTEM
System has a rotor-type oil pump and full-flow oil filter.
Oil is forced by pump through a series of oil passages in engine to
provide lubrication to engine components. Oil is supplied to rocker
assembly through hollow push rods. Push rods are fed oil from lifters.
See Fig. 17 .
Crankcase Capacity
On 3.9L, oil capacity with oil filter is 4.0 qts. (3.8L). On
5.2L and 5.9L, oil capacity with oil filter is 5.0 qts. (4.7L).
Oil Pressure
Oil pressure is 6 psi (.4 kg/cm
) at idle and 30-80 psi (2.1-
5.6 kg/cm) at 3000 RPM with engine at normal operating temperature.

rust may be removed using bead blasting method. Components must be
free of oil and grease prior to bead blasting. Beads will stick to
grease or oil soaked areas causing area not to be cleaned.
Use air pressure to remove all trapped residual beads from
components after cleaning. After cleaning internal engine parts made
of aluminum, wash thoroughly with hot soapy water. Component must be
thoroughly cleaned as glass beads will enter engine oil resulting in
bearing damage.
CHEMICAL CLEANING
Solvent tank is used for cleaning oily residue from
components. Solvent blasting sprays solvent through a siphon gun using
compressed air.
The hot tank, using heated caustic solvents, is used for
cleaning ferrous materials only. DO NOT clean aluminum parts such as
cylinder heads, bearings or other soft metals using the hot tank.
After cleaning, flush parts with hot water.
A non-ferrous part will be ruined and caustic solution will
be diluted if placed in the hot tank. Always use eye protection and
gloves when using the hot tank.
Use of a cold tank is for cleaning of aluminum cylinder
heads, carburetors and other soft metals. A less caustic and unheated
solution is used. Parts may be lift in the tank for several hours
without damage. After cleaning, flush parts with hot water.
Steam cleaning, with boiling hot water sprayed at high
pressure, is recommended as the final cleaning process when using
either hot or cold tank cleaning.
COMPONENT CLEANING
* PLEASE READ THIS FIRST *
NOTE: Always refer to appropriate engine overhaul article in the
ENGINES section for complete overhaul procedures and
specifications for the vehicle being repaired.
SHEET METAL PARTS
Examples of sheet metal parts are the rocker covers, front
and side covers, oil pan and bellhousing dust cover. Glass bead
blasting or hot tank may be used for cleaning.
Ensure all mating surfaces are flat. Deformed surfaces should
be straightened. Check all sheet metal parts for cracks and dents.
INTAKE & EXHAUST MANIFOLDS
Using solvent cleaning or bead blasting, clean manifolds for
inspection. If the intake manifold has an exhaust crossover, all
carbon deposits must be removed. Inspect manifolds for cracks, burned
or eroded areas, corrosion and damage to fasteners.
Exhaust heat and products of combustion cause threads of
fasteners to corrode. Replace studs and bolts as necessary. On "V"
type intake manifolds, the sheet metal oil shield must be removed for
proper cleaning and inspection. Ensure that all manifold parting
surfaces are flat and free of burrs.
CYLINDER HEAD REPLACEMENT
* PLEASE READ THIS FIRST *