1999 DODGE RAM engine

same axle to eliminate uneven braking behavior. Always wash drums
after servicing or before installing.
DRUM INSPECTION









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Condition Code Procedure
Balance weight missing .. .. ........ No service suggested or
required.
Bell-mouthed, affecting
performance ............ A ....... Require reconditioning or
replacement.
Cooling fin broken ...... .. ........ No service suggested or
required.
Cracked ................. B ............ Require replacement.
Drum diameter is greater
than OEM "machine to"
specifications but less
than "discard at"
specifications, and the
drum does not require
reconditioning ......... 1 ........ (1) Suggest replacement.
Drum diameter will exceed
OEM "machine to"
specifications after
required
reconditioning ......... B ........ ( 2) Require replacement.
Hard-spotted ............ 2 ....... Suggest reconditioning or
replacement.
Measured diameter is
greater than OEM discard
specifications ......... B ............ Require replacement.
Out-of-round (runout),
affecting performance .. A ....... Require reconditioning or
replacement.
Out-of-round (runout),
exceeding manufacturer's
specifications ......... B ....... Require reconditioning or
replacement.
Scored .................. B ....... Require reconditioning or
replacement.
Surface threaded due to
improper machining ..... B ....... Require reconditioning or
replacement.
Tapered, affecting
performance ............ A ....... Require reconditioning or
replacement.
( 1) - Only applies to vehicles for which OEM "machine to"
specifications exist. If OEM does not supply "machine to"
specifications, the drum may be worn to discard
specifications.
( 2) - If OEM does not supply "machine to" specifications, you
may machine to discard specifications.









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ELECTRICAL PUMPS AND MOTORS
Copied fuel pump conditions from engine UIGs & deleted
pulsator from leaking conditions.
ELECTRICAL PUMP AND MOTOR INSPECTION









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NOTE: Copied Vehicle Speed Sensors from Engine UIGs & added
Air Gap incorrect, loose, and wire lead misrouted. For
"contaminated" removed coolant & fuel examples from note.
SPEED SENSOR INSPECTION









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Condition Code Procedure
Air gap incorrect ....... B ....... (1) Require adjustment or
replacement.
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware
threads damaged ........ A ... Require repair or replacement
of hardware.
Attaching hardware
threads stripped
(threads missing) ...... A .. Require repair or replacement
of hardware.
Connector broken ........ A .. Require repair or replacement.
Connector (Weatherpack
type) leaking ........... A .. Require repair or replacement.
Connector melted ........ A ........... ( 2) Require repair or
replacement.
Connector missing ....... C ............ Require replacement.
Contaminated ............ A ........... ( 3) Require repair or
replacement.
Inoperative ............. B ........... ( 4) Require repair or
replacement. Further
inspection required.
Lead routing incorrect .. B ..... Require rerouting according
to vehicle manufacturer's
specifications.
Leaking ................. A .. Require repair or replacement.
Loose ................... A .. Require repair or replacement.
Missing ................. C ............ Require replacement.
Resistance out of
specification .......... B .. Require repair or replacement.
Sensor housing cracked .. 2 ............ Suggest replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal burned,
affecting performance .. A ........... ( 2) 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.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped
(threads missing) ...... A ............ Require replacement.
Wire lead conductors
exposed ................ B .. Require repair or replacement.
Wire lead corroded ...... A .. Require repair or replacement.
Wire lead misrouted ..... B . Require re-routing according to
vehicle manufacturer's

BRAK E S YSTE M
1999 D odge P ic ku p R 1500
1998-99 BRAKES
CHRY - Disc & Drum - Trucks & Vans - Except FWD
Dakota, Ram Pickup, Ram Van
DESCRIPTION & OPERATION
All models are equipped with single-piston, sliding-caliper
front disc brakes with ventilated rotors. All models utilize self-
adjusting rear drum brakes. Rear Wheel Anti-Lock (RWAL) brake system
is standard on all models. Optional 4-wheel Anti-Lock (4WAL) brake
system is available on all models.
System also includes power brake booster, dual-reservoir
master cylinder and combination valve. Combination valve consists of
metering valve and pressure differential switch.
Models with diesel engine include a gear-driven vacuum pump.
Depending on speed of engine, pump produces 8-25 in. Hg. Models
without full-floating rear axle use 9", 10" or 11" single-anchor rear
brakes. Models with full-floating rear axle use 12" or 13" single-
anchor rear brakes.
NOTE: For information on Anti-Lock Brake Systems (ABS), see
appropriate ANTI-LOCK article.
BLEEDING BRAKE SYSTEM
BLEEDING PROCEDURES
Complete Brake System
Before bleeding system, exhaust all vacuum from power unit by
depressing brake pedal several times. Bleed master cylinder using
bleeder screws (if equipped). Bleed wheel cylinders and calipers in
sequence. See BLEEDING SEQUENCE table.
BLEEDING SEQUENCE









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Application Sequence
1999 Dakota & Ram Van .......... Master Cylinder, Combination Valve,
RR, LR, RF & LF
All Other Models ............... Master Cylinder, Combination Valve,
Rear Anti-Lock Valve, RR, LR, RF & LF









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Master Cylinder (Bench Bleeding)
1) Bench bleed master cylinder before installation. Place
master cylinder in soft-jaw vise. Install bleeder tubes in both
outlets of master cylinder. See Fig. 1.
2) Fill master cylinder with clean brake fluid. Ensure ends
of bleeder tubes are submerged in brake fluid.
3) Using a wood dowel, apply and release master cylinder
until no air bubbles exist in brake fluid flow. Leave bleeder tubes
installed on master cylinder during installation. Install master
cylinder. Remove bleeder tubes, and connect brakelines. Bleed brake
system if necessary.

1) Start engine, and check booster vacuum hose connections. A
hissing noise indicates a vacuum leak. Repair any vacuum leaks before
proceeding. Stop engine, and shift transmission into Neutral. Pump
brake pedal until all vacuum reserve in booster is depleted.
2) Hold brake pedal under light pressure. If pedal does not
hold firm and falls away, master cylinder may be faulty. Bleed system
using appropriate method, and repeat step 1). See BLEEDING PROCEDURES
under BLEEDING BRAKE SYSTEM.
3) If pedal still does not hold firm, master cylinder is
faulty. If pedal holds firm, start engine and observe pedal height. If
pedal height change is not apparent, power booster or vacuum check
valve is faulty. Install good check valve, and repeat steps 1) and 2).\
If pedal falls away slightly under light pressure and then holds firm,
go to next step .
4) Start engine. Release brake pedal. Increase engine speed
to 1500 RPM. Close throttle and immediately turn off ignition. Wait at
least 90 seconds, and try brake action again. Booster should provide 2
or more vacuum assisted pedal applications. If vacuum assist is not
provided, perform booster and check valve vacuum tests.
POWER BRAKE BOOSTER VACUUM TEST
Connect vacuum gauge to booster check valve using "T"
fitting. Start engine, and run at idle speed for one minute. Clamp
hose shut between vacuum source and check valve. Stop engine, and
observe vacuum gauge. If vacuum drops more than one in. Hg within 15
seconds, booster diaphragm or check valve is faulty.
POWER BRAKE BOOSTER CHECK VALVE TEST
Disconnect vacuum hose from check valve. Remove check valve
and valve seal from booster. Use a hand-operated vacuum pump for
testing. Apply 15-20 in. Hg at large end of check valve. Vacuum should
hold steady. If gauge on pump indicates vacuum loss, check valve is
faulty and should be replaced.
COMBINATION VALVE METERING VALVE TEST
Metering valve operation can be checked visually with aid of
an assistant. While an assistant applies and releases brake pedal,
observe metering valve stem. If valve is operating correctly, stem
will extend slightly when brakes are applied, and contract when brakes
are released. If valve is faulty, replace combination valve assembly.
COMBINATION VALVE PRESSURE DIFFERENTIAL SWITCH TEST
1) Using an assistant, apply brake pedal. Observe brake
warning light. Raise and support vehicle, and connect a bleed hose to
one rear wheel cylinder. Submerge other end of hose into container
partially filled with brake fluid. Have assistant press and hold brake
pedal down while observing brake warning light. Open bleeder screw. If
warning light glows, switch is operating properly.
2) If warning light fails to glow, check circuit fuse, bulb
and wiring. Repair as necessary. Repeat step 1). If warning light
fails to glow, check brakelight, parking brake switches and related
wiring. Repair as necessary. Repeat step 1). If warning light fails to
glow, pressure differential switch is faulty. Replace combination
valve assembly, and bleed brake system. Verify proper valve operation.
REMOVAL & INSTALLATION

Removal & Installation
1) Disconnect and plug primary and secondary brakelines from
master cylinder. Remove master cylinder-to-power brake booster nuts.
Slide master cylinder straight out and away from power brake booster
unit.
2) Ensure reservoir is empty. Install master cylinder in
soft-jaw vise. Pry gently upward between reservoir ports while working
reservoir side to side. Remove reservoir and grommets. See Fig. 6.
3) Install NEW grommets in master cylinder ports. Lubricate
grommets with brake fluid. Firmly and evenly, press reservoir into
grommets by hand.
4) To complete installation, position master cylinder over
studs of power brake booster. Align power cylinder brake push rod with
cylinder piston. Install master cylinder nuts, and tighten to
specification. See TORQUE SPECIFICATIONS table. Connect both
brakelines. Bleed system. See BLEEDING BRAKE SYSTEM.
Fig. 6: Exploded View Of Master Cylinder (Ram Pickup)
Courtesy of Chrysler Corp.
POWER BRAKE BOOSTER
Removal
1) Disconnect vacuum hose from booster check valve. Remove
nuts attaching master cylinder, and move cylinder away from booster.
Inside vehicle, remove booster push rod-to-brake pedal clip. Pry clip
off pedal pivot pin.
2) Remove lock nuts from booster mounting studs. Slide
booster away from dash and out of engine compartment. If booster is

CLU TC H
1999 D odge P ic ku p R 1500
1998-99 CLUTCHES
CHRY - RWD - Trucks
Dakota, Ram Pickup
DESCRIPTION
Clutches on all models are dry, single-disc design.
Adjustment for wear is not possible. Clutch pedal is connected to
release fork through a hydraulic master cylinder and slave cylinder
and is not adjustable. Pre-lubricated clutch bearing is constant
running type. External adjustments cannot be made.
All models are equipped with a clutch pedal position switch.
The switch completes the circuit to the starter relay and is mounted
on clutch master cylinder push rod. The position switch is an integral
part of clutch master cylinder push rod and cannot be serviced
separately.
TRANSMISSION/TRANSFER CASE APPLICATION









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Transmission Transfer Case
Dakota
AX15, NV1500 & NV3500 .............................. NV231 & NV242
Ram Pickup
NV3500, NV4500, NV4500HD & NV5600 ..... NV231HD, NV241LD & NV241HD









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ADJUSTMENTS
CLUTCH PEDAL FREE PLAY
NOTE: Clutches are a single, dry disc type. Adjustment for wear is
not possible. Clutch is actuated through hydraulic master
cylinder and slave cylinder, and is self-adjusting.
SHIFT LINKAGE ADJUSTMENT
NV231 (Dakota)
1) Shift transfer case into 4H position, and secure shift
lever in shift gate. See Fig. 1. Raise and support vehicle. Loosen
shift rod lock bolt at swivel. Ensure shift rod slides freely in
adjusting swivel.
2) Ensure transfer case range lever is in 4H position. Slide
adjusting swivel forward until shift rod contacts shift gate
crossover, then slide adjusting swivel back, allowing a .11-.20" (3-5
mm) gap between shift lever and shift gate.
3) Center pin on adjusting swivel in shift arm and tighten
lock bolt to 90 INCH lbs. (10 N.m.). Lower vehicle, making sure all
wheels are off floor. Start engine. Shift transfer case through all
ranges to verify correct adjustment.
NV231HD, NV241LD & NV241HD (Ram Pickup)
1) Place shift lever into 2H position. Raise and support
vehicle. Loosen shift rod lock bolt at swivel. See Fig. 2. Ensure
shift rod fits in swivel and does not bind.
2) Ensure transfer case shift lever is in 2H position. Lower
vehicle. Position shift lever in cab so distance between instrument

panel and 2H position dot in shift lever insert is 5.75" (14.6 cm).
Make measurement parallel to floor of vehicle.
3) Tighten shift rod lock bolt to 90 INCH lbs. (10 N.m).
Start engine. Shift transfer case through all ranges to verify proper
operation.
NV242 (Dakota)
1) Put shift lever into 4FT position and secure. Raise
vehicle. Loosen shift rod lock bolt at swivel. See Fig. 1. Ensure
shift rod slides freely in adjusting swivel.
2) Ensure transfer case shift lever is in 4FT position. Slide
adjusting swivel forward until shift lever contacts shifter gate
crossover then slide adjusting swivel back, allowing a 0.11-0.20" (3-5
mm) gap between shift lever and shift gate.
3) Center pin on adjusting swivel in shift arm and tighten
lock bolt to 90 INCH lbs. (10 N.m). Lower vehicle, making sure wheels
are off floor. Start engine. Shift transfer case through all ranges to
verify correct adjustment.
Fig. 1: Adjusting Transfer Case Shift Linkage (Dakota)
Courtesy of Chrysler Corp.

CLUTCH HOUSING (RAM PICKUP)
NOTE: Only NV4500 clutch housing can be checked using the following
bore and face runout procedures. The NV1500, NV3500 and
NV5600 clutch housings are an integral part of transmission
front case and can only be checked off vehicle.
Clutch Housing Bore Runout (NV4500)
1) Remove clutch housing. Remove clutch cover and disc. See
CLUTCH ASSEMBLY under REMOVAL & INSTALLATION. Replace one flywheel
bolt with a threaded rod. See Fig. 2. Remove release fork from clutch
housing. Reinstall clutch housing. Tighten housing bolts nearest
alignment dowels first. Mount dial indicator on threaded rod and
position indicator plunger on surface of clutch housing bore. See
Fig. 4 .
2) Rotate crankshaft until indicator plunger is at top center
of housing bore. Zero dial indicator. Rotate crankshaft and record
indicator readings at 8 points, 45 degrees apart, around bore. See
Fig. 5 .
3) Repeat measurement at least twice. Subtract each reading
from one 180 degrees opposite to determine magnitude and direction of
runout. For example: 0.000" minus (-0.007") = 0.007", 0.002" minus (-\
0.010") = 0.01", 0.004" minus (-0.005") = 0.009" or -0.001" minus (0\
.
001") = -0.002" which will be 0.002". In this example, largest
difference is 0.012" (total indicator reading). This means housing
bore is offset from crankshaft centerline by 0.006" (1/2 of 0.012").
4) On gas engines, acceptable total indicator reading is 0.
010". If measured total indicator reading is more than 0.010", bore
runout will have to be corrected using offset dowels. Offset dowels
are available in 0.007", 0.014" and 0.021". See DOWEL SELECTION table.
If total indicator reading is 0.053" or greater, replace clutch
housing. If dial indicator reads positive when plunger moves inward
(toward indicator) and negative when moves outward away from
indicator), lowest or most negative reading determines direction of
housing bore offset (runout).
5) On diesel engines, offset dowels are not available to
correct runout. If total indicator reading exceeds bore runout of 0.
015", replace either clutch housing, or transmission adapter plate. On
gas engines, if bore is offset, remove housing and original dowels,
install new offset dowels in direction need to center bore with
crankshaft centerline. Install new dowels with slotted side facing
out. Using a screwdriver, rotate dowels until total indicator reading
is less than 0.010". Ensure clutch housing face runout is within
specification.
DOWEL SELECTION









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Application - In. (mm) Offset Dowel - In. (mm\
)
0.011-0.021 (0.2794-0.5334) ......................... 0.007 (0.1778\
)
0.022-0.035 (0.5588-0.8890) ......................... 0.014 (0.3556\
)
0.036-0.052 (0.9144-1.3208) ......................... 0.021 (0.5334\
)









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Fig. 3: Manufactured Stud Or Threaded Rod
Courtesy of Chrysler Corp.