DODGE RAM 1999 Service Repair Manual

4) Difference between 2 measured angles is drive shaft front
angle. See Fig. 5. Compare front and rear angles. Allowable difference
between angles is plus or minus one degree. If difference of angles is
greater than specified, adjustment is necessary. See ADJUSTING
VERTICAL ANGLE.
Fig. 4: Measuring Drive Shaft Vertical Angle
Courtesy of Chrysler Corp.
Fig. 5: Identifying Front & Rear Vertical Angle
Courtesy of Chrysler Corp.
2-Piece Non-Parallel Drive Shafts (Broken-Back Type)
1) A broken-back type driveline is where yokes are not

perpendicular to each other in vertical plane. See Fig. 6. With non-
parallel or broken-back type installation, working angles of "U"
joints of given drive shaft must be equal (angle "A" = angle "B").
Fig. 6: Identifying Broken-Back Type Drive Shaft
Courtesy of Chrysler Corp.
2) Calculate by subtracting angle of output shaft center line
from angle of drive shaft. Difference should be equal to front shaft
angle subtracted from rear shaft angle.
2-Piece Drive Shafts (Except Broken-Back Type)
1) All yokes must be perpendicular in both vertical and
horizontal planes to engine crankshaft. Using Inclinometer (C-4224),
measure drive shaft vertical angles.
2) Raise and support vehicle so rear wheels can be rotated.
Rotate drive shaft so a pinion flange bearing cap faces downward.
Attach inclinometer magnet to bearing cap, and note angle. See Fig. 4.
Remove inclinometer.
3) Rotate drive shaft 90 degrees until drive shaft rear yoke
bearing cap faces downward. Attach inclinometer magnet to bearing cap,
and note angle. Difference between 2 measured angles is drive shaft
rear angle. See Fig. 5. Remove inclinometer.
4) Rotate drive shaft until a slip joint yoke bearing cap
faces downward. Attach inclinometer magnet to bearing cap, and note
angle. Remove inclinometer. Rotate drive shaft 90 degrees until drive
shaft front yoke bearing cap faces downward. Attach inclinometer
magnet to bearing cap, and note angle. Difference between 2 measured
angles is drive shaft front angle. See Fig. 5. Remove inclinometer.
5) Rotate drive shaft until front yoke of rear shaft faces
downward. Attach inclinometer magnet to bearing cap, and note angle.
Rotate drive shaft until rear yoke of front drive shaft faces
downward. Attach inclinometer magnet to bearing cap, and note angle.
Remove inclinometer.
6) Difference between 2 measured angles is drive shaft center
angle. Compare front, center and rear angles. Vertical alignment of 2
piece drive shafts at yokes should be greater than 1/2 degree and must
be retained as close to one degree as possible. See Fig. 7. If
difference of angles is greater than specified, adjustment is
necessary. See ADJUSTING VERTICAL ANGLE.

Fig. 7: Checking Vertical Alignment Of 2-Piece Drive Shaft
Courtesy of Chrysler Corp.
ADJUSTING VERTICAL ANGLE
If front angle minus rear angle is greater than one degree
positive (+1 degree), rear angle is too small and must be increased.
If front angle minus rear angle is greater than one degree negative (-
1 degree), rear angle is too large and must be decreased.
1) Raise and support rear of vehicle. Position a jack under
differential housing. Remove rear wheel assemblies. Loosen rear spring
"U" bolt nuts. Insert tapered shim between spring and axle spring pad.
If increasing angle, insert shim with taper facing front of vehicle.
If decreasing angle, insert shim with taper facing rear of vehicle.
NOTE: If encountering difficulty in making drive shaft vertical
adjustments on one-piece drive shafts, drive shaft may be out
of horizontal alignment. See CHECKING HORIZONTAL ALIGNMENT.
NOTE: On 2-piece drive shafts, center angle is adjusted by use of
shims between center support mounting bracket and frame
crossmember. Center angle may need adjusting if rear angle is
changed.
2) Tighten spring "U" bolt nuts to specification. See TORQUE
SPECIFICATIONS table. Recheck drive shaft angle measurements. See
CHECKING VERTICAL ANGLE.
CHECKING HORIZONTAL ALIGNMENT
1) Drive shaft horizontal alignment should be checked if
frame damage is suspected or when major components have been replaced.
See Fig. 8 .
2) Clamp a long straightedge (12" longer than width of rear
wheel track) at 90 degrees to frame side rails. See Fig. 9. Use large
framing squares to align straightedge with side rails.

Fig. 8: Identifying Horizontal Misalignment Of Drive Shaft
Courtesy of Chrysler Corp.
Fig. 9: Checking Horizontal Alignment
Courtesy of Chrysler Corp.
3) To make horizontal alignment checks, set up straightedges
as shown. See Fig. 9. Set transmission output flange/yoke

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

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.

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
distorting yoke, DO NOT overtighten vise jaws.
3) Using vise or press, push bearing caps into yoke bores,
keeping spider aligned in center of bearing caps. Using socket with
diameter slightly smaller than bearing cap, continue pressing caps
inward until retainer clips can be installed. Install inner or outer
type bearing cap retainer clips.
4) Install lube fitting, and lube "U" joint. Install drive
shaft. Tighten "U" joint clamp bolts to 14 ft. lbs. (19 N.m). Lower
vehicle.
Fig. 11: Exploded View Of Single Cardan "U" Joint
Courtesy of Chrysler Corp.
DOUBLE CARDAN CONSTANT VELOCITY (CV) JOINT (4WD)
NOTE: 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 assembly must
be replaced.
CAUTION: DO NOT allow pinion flange end of front drive shaft to hang
free or bend at sharp angle from CV joint.
Removal & Disassembly (Dakota & Ram Pickup)
1) Mark drive shaft yoke-to-front pinion flange position and
transfer case flange-to-CV joint flange position for installation
reference. Remove CV joint flange-to-transfer case flange bolts first,
then remove pinion flange bolts. Remove front drive shaft from
vehicle. DO NOT bend shaft at sharp angle from CV joint.
2) Mark CV joint components for reassembly reference. Remove
all inner or outer type bearing cap retaining clips. See Fig. 12.
3) Set joint in arbor press or vise and place a socket on
upper bearing cap. Partially press one bearing cap from outer side of

link yoke enough to grasp bearing cap with vise jaws. Remove grease
fittings that interfere with removal.
4) Grasp protruding bearing in vise jaws. Tap link yoke with
mallet and drift to dislodge bearing cap from yoke.
5) Flip assembly and repeat steps 3 and 4 to remove opposite
bearing cap. Remove cross centering kit assembly and spring.
6) Press remaining bearing caps out other end of link yoke to
complete disassembly.
Reassembly & Installation
1) Clean dirt and rust from all contact areas. Apply
multipurpose lubricant (NLGI grade 2 EP) to yoke bores and into needle\
bearings of each bearing cap. Lube center socket yoke and needle
bearings. See Fig. 12.
2) Position spider in drive shaft yoke bore. Reassemble
components in reverse order of disassembly, ensuring reference marks
align. Install drive shaft in vehicle, and tighten flange bolts to
specification. See TORQUE SPECIFICATIONS table.
Installation
1) Before installing drive shaft, clean mating flange, and
inspect machined surface for scratches, nicks and burrs. Support drive
shaft during installation to prevent bending shaft at sharp angle to
CV joint and causing damage to "U" joints.
2) Aligning reference marks, install CV joint flange to
transfer case flange first, then install shaft to pinion flange.
Attach 2 clamps to pinion flange, and tighten attaching bolts to
specification. Install and tighten 4 bolts to CV joint at transfer
case flange.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS








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Application Ft. Lbs. (N.m)\
Center Bearing Support Bracket-To-Upper Bracket Bolts ...... 50 (68)\
Center Bearing Upper Bracket-To-Frame Bolts ................ 50 (68)\
Spring "U" Bolt Nuts
Dakota
2WD ..................................................... 65 (88)\
4WD ................................................... 110 (149)\
Ram Pickup ............................................. 110 (149)\
Ram Van/Wagon
B150 & B250 ............................................. 45 (61)\
B350 .................................................. 110 (149)\
Transfer Case Flange-To-CV Joint Flange Bolts
Dakota ................................................... 20 (27)\
Ram Pickup ............................................... 65 (88)\
"U" Joint Clamp-To-Pinion Flange Bolts
1/4" ..................................................... 14 (19)\
5/16" .................................................... 25 (34)\
Wheel Lug Nuts
Dakota .......................................... 85-115 (115-156)\
Ram Pickup
5-Lug .................................................. 95 (129)\
8-Lug (Single Wheel) .................................. 135 (183\
)
8-Lug (Dual Wheel) .................................... 145 (196\
)
Ram Van/Wagon
5-Lug .......................................... 80-110 (108-149)\
8-Lug ......................................... 120-150 (163-203)\









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Fig. 12: Double Cardan Constant Velocity (CV) "U" Joint (Dakota &
Ram Pickup)
Courtesy of Chrysler Corp.


* D RIV ETR AIN S YSTE M S U NIF O RM IN SPEC TIO N G UID ELIN ES *

1 999 D odge P ic ku p R 1500
GENERAL INFORMATION
Drivetrain/Transmission Motorist Assurance Program
Standards For Automotive Repair
All Makes and Models
INTRODUCTION TO MOTORIST ASSURANCE PROGRAM (MAP)
CONTENTS
OVERVIEW OF MOTORIST ASSURANCE PROGRAM
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
Drive/Power Train Assemblies
AUTOMATIC TRANSMISSION/TRANSAXLE ASSEMBLIES
DIFFERENTIAL AND FINAL DRIVE ASSEMBLIES
MANUAL TRANSMISSION/TRANSAXLE ASSEMBLIES
TRANSFER CASE ASSEMBLIES
Drive/Power Train Components
ACTUATORS (ELECTRICAL)
ACTUATORS (VACUUM)
AXLES
BEARINGS AND RACES
BELL CRANKS
BELL HOUSINGS
BUSHINGS (EXTERNAL)
CABLES (SPEEDOMETER)
CABLES (TV, DETENT AND SHIFT)
CARRIER BEARINGS
CLUTCH CABLES AND CABLE HOUSINGS
CLUTCH DISCS (MANUAL TRANSMISSION)
CLUTCH FORKS
CLUTCH LINKAGES (MECHANICAL)
CLUTCH MASTER CYLINDERS
CLUTCH PEDALS
CLUTCH PIVOTS
CLUTCH PRESSURE PLATES
CLUTCH RELEASE BEARINGS
CLUTCH SLAVE CYLINDERS (CONCENTRIC)
CLUTCH SLAVE CYLINDERS (CONVENTIONAL OR EXTERNAL)
COMPANION FLANGES
CONNECTORS
COOLER BYPASS VALVES
COOLER LINES
COOLERS
CV JOINTS
DIP STICK TUBES
DIP STICKS (FLUID LEVEL INDICATORS)
DOWEL PINS, GUIDES AND PILOT HOLES
DRIVE SHAFT FLANGES
DRIVE SHAFTS AND HALF SHAFTS
DUST BOOTS
ENGINE MOUNTS
EXCITER RINGS
FILLER TUBES
FILTERS AND SCREENS