1999 DODGE RAM 4WD

TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS








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Application Ft. Lbs. (N.m)\
Clutch Master Cylinder Nuts ................................ 40 (54)\
Clutch Slave Cylinder Nuts ................................. 17 (23)\
Crossmember-To-Frame Bolts
AX15 & NV3500 (Dakota) ..................................... 30 (41\
)
NV3500 (Ram Pickup) ........................................ 50 (68\
)
Crossmember-To-Transmission Insulator Nuts
2WD (NV3500 - Ram Pickup) ................................ 50 (68\
)
4WD (NV3500 - Ram Pickup) .......................... 40-45 (54-61\
)
Flywheel Bolts
Dakota 2.5L ................................................ 70 (95)\
Dakota V6 & V8 ............................................. 55 (75)\
Pressure Plate Bolts
5/16" .................................................... 17 (23)\
3/8" ..................................................... 30 (41)\
Transfer Case To Transmission Nuts
AX15 ................................................. 26 (35 N.m)\
NV3500, NV4500, NV4500HD & NV5600
5/16" ............................................. 22-30 (30-41)\
3/8" .............................................. 30-35 (41-47)\
Transmission-To-Clutch Housing Bolts
AX15 ..................................................... 27 (37)\
NV3500 (Ram Pickup) & NV5600 ....................... 40-45 (54-61\
)
NV1500, NV3500 (Dakota), NV4500 & NV 4500HD ............. 80 (108\
)
"U" Joint Clamp Bolts ...................................... 14 (19)\
INCH Lbs. (N.m)
Shift Tower Bolts (NV3500) ............................ 62-89 (7-10\
)









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267 RBI ................................................ 7.0 (3.3)\
286 RBI
2WD ................................................... 6.8 (3.2)\
4WD .................................................. 10.1 (4.8)\
Ram Van/Wagon
248 RBI ................................................ 6.0 (2.8)\
(1) - Approximate drive axle capacity listed. Lubricant level should
be 1/2" below oil filler hole in axle housing cover.









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FLUID TYPE
Use SAE 80W-90 for 286 models, or 90W for all other models,
hypoid gear lubricant with MIL-L-2105-C and API GL-5 ratings. Models
with Trac-Lok require addition of 6 ozs. (.18 L) Mopar(R) friction
modifier (limited slip additive). Ram Pickups equipped with Power-Lok
require addition of 8 ozs. (.24 L) Mopar(R) friction modifier.
TROUBLE SHOOTING
NOTE: See appropriate table in TROUBLE SHOOTING article in GENERAL
INFORMATION.
REMOVAL & INSTALLATION
REAR HUB, BEARINGS & AXLE SHAFT
Removal
Raise and support vehicle. Remove wheel. Remove bolts, axle
shaft and gasket. Remove nut lock from adjusting nut. See Fig. 1.
Remove adjusting nut and outer wheel bearing. Remove rear hub and
brake drum. Remove oil seal and inner wheel bearing (if necessary).
Installation
1) Pack wheel bearings with wheel bearing grease. Install
inner wheel bearing and oil seal in rear hub (if removed). Install
rear hub and brake drum. Install outer wheel bearing and adjusting
nut. Tighten adjusting nut to specification while rotating rear hub
and brake drum. See TORQUE SPECIFICATIONS table.
2) Back off adjusting nut approximately 1/8 turn to obtain .
001-.010" (.03-.25 mm) wheel bearing end play. Tap key lock into
adjusting nut and keyway on axle housing.
3) To install remaining components, reverse removal
procedure. Use NEW gasket when installing axle shaft. Tighten bolts to
specification. See TORQUE SPECIFICATIONS table.
DRIVE SHAFT
Removal
1) Raise and support vehicle. Ensure transmission and
transfer case selector levers are in Neutral. Remove wheel assembly.
Remove RWAL sensor, if equipped. Reference mark drive shaft to pinion
flange for reassembly.
2) On 2-piece drive shafts, scribe center carrier bearing-to-
frame bracket reference line for reassembly. On all drive shafts,
remove bolts and "U" joint straps at pinion flange. Remove center
carrier bearing bolts, if equipped. Remove spring clamps and brackets.
Remove drive shaft(s).
CAUTION: The "U" joint straps and bolts must be replaced. DO NOT

Center Carrier Bearing Bolt ................................ 50 (68)\
Pinion Nut (Minimum Torque) .............................. 210 (285\
)
Ring Gear Bolt (1)
Dakota
8 1/4" ................................................. 75 (102)\
9 1/4" ................................................. 115 (157)\
Ram Pickup ............................................... 70 (95)\
Ram Van/Wagon ........................................... 75 (102)\
Shock Absorber Nut ......................................... 60 (81)\
"U" Bolt Nut
8 1/4" Ring Gear
Dakota 2WD .............................................. 65 (88)\
Dakota 4WD ............................................ 110 (149)\
9 1/4" Ring Gears
1/2" X 20 Bolt Thread ................................... 65 (88)\
9/16" X 18 Bolt Thread ................................ 110 (149)\
"U" Joint Strap Bolt
Diesel Models ............................................ 25 (34)\
Gasoline Models .......................................... 14 (19)\
Wheel Lug Nut
Dakota .......................................... 85-110 (115-149)\
Ram Pickup
5-Lug .......................................... 80-110 (108-149)\
8-Lug (Single Wheel) .......................... 120-150 (163-203\
)
8-Lug (Dual Wheel) ............................ 130-160 (176-217\
)
Ram Van/Wagon
1/2" Stud
60-Degree Cone ............................... 80-110 (108-149)\
90-Degree Cone ............................... 85-115 (115-156)\
5/8" Stud
90-Degree Cone .............................. 175-225 (237-305)\
Flanged Nut ................................. 300-350 (407-474)\
INCH Lbs. (N.m)
Adjuster Lock Bolt ......................................... 90 (10)\
Pinion Shaft Lock Bolt ( 2) ................................. 96 (11)
( 1) - Left-hand threaded bolts.
( 2) - Apply Loctite to bolt threads.









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LUBRICATION
CAPACITY
DRIVE AXLE CAPACITY ( 1)








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Application ( 2) Pts. (L)
Dakota .................................................... 4.7(2.2)\
Ram Pickup
248 RBI ................................................ 6.3 (3.0)\
267 RBI .................................................. 7 (3.3)\
286 RBI
2WD ................................................... 6.8 (3.2)\
4WD .................................................. 10.1 (4.8)\
Ram Van/Wagon ............................................ 6.3 (3.0)\
( 1) - Approximate drive axle capacity listed. Lubricant level should
be within 1/2" below bottom of oil filler hole in axle housing
cover.
( 2) - Add container of Mopar Gear Oil Friction Modifier when
refilling.









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FLUID TYPE
Use SAE 80W-90 or SAE 90W hypoid gear lubricant with MIL-L-
2105-C and API GL-5 ratings. Also add a container of Mopar Gear Oil
Friction Modifier when refilling.
FLUID DRAIN & REFILL
1) With lubricant of rear axle assembly at operating
temperature, raise and support vehicle so rear wheels are free to
rotate. Clean around axle housing cover. Loosen axle housing cover
bolts. Drain lubricant from axle housing. Remove bolts and axle
housing cover.
2) Position differential so hole in differential case is
facing downward. Wipe out all accessible areas of axle housing. Ensure
sealing surfaces on axle housing and cover are clean. Apply a 1/4"
thick bead of silicone sealant on inside of bolt holes and along
sealing surfaces on axle housing cover.
3) Install axle housing cover, axle identification tag and
retaining bolts. Tighten bolts to 30-35 ft. lbs. (41-47 N.m). Remove
oil filler plug. Add a container of Mopar Gear Oil Friction Modifier.
Fill axle with gear lube. Install oil filler plug. Lower vehicle.
TROUBLE SHOOTING
DIFFERENTIAL NOISE
1) Ensure differential lubricant is at normal operating
temperature. Road test vehicle. Note if differential noise exists in
turns, but not during straight-ahead driving. Probable cause is
incorrect or insufficient rear axle lubricant or additive.
2) Drain and refill rear axle. See FLUID DRAIN & REFILL under
LUBRICATION. Road test vehicle making 10-12 slow figure-8 turns and
note if noise still exists. It may be necessary to disassemble rear
axle so differential can be repaired. See RBI FULL FLOATING AXLES
article for removal of differential case.

DRIV E S H AFTS & " U " J O IN TS - R W D

1999 D odge P ic ku p R 1500
1998-99 Drive Axles
CHRY - Drive Shafts & "U" Joints - RWD Trucks
Dakota, Ram Pickup, Ram Van/Wagon
DESCRIPTION
Drive shafts are balanced, tubular shafts with "U" joints
attached at each end. Flanges or yokes are used to connect drive shaft
"U" joints to rear differential pinion flange or to transmission
output shaft. "U" joint bearing caps are bolted to shaft flanges, or
are pressed into shaft yokes. Drive shafts can be steel or aluminum.
Number of drive shafts used by vehicle depends on vehicle
length and 4WD capability. Long wheel base vehicles use 2 rear drive
shafts with a center bearing support assembly. See Fig. 1. 4WD
applications use a double cardan constant velocity joint on front axle
drive shaft for correct drive shaft-to-front axle alignment. See
Fig. 12 .
Locations of slip joints and splined shafts vary with model
application. Single tube type drive shaft has slip joint on outside of
"U" joint flange/yoke. This slip joint slides in and out on
transmission's splined main shaft.
Fig. 1: Identifying Common Drive Shaft Combinations
Courtesy of Chrysler Corp.
LUBRICATION

1) On drive shafts greater than 30" in length, measure runout
3" from transmission flange/yoke, center bearing yoke and pinion
flange using dial indicator. Maximum runout for Ram Pickup is .030" (.
76 mm) at front and rear end of drive shaft and .035" (.89 mm) at
center of drive shaft. Maximum runout for all other models is .010" (.
25 mm) at front and rear end of drive shaft and .015" (.38 mm) at
center of drive shaft.
2) For drive shafts less than 30" in length, maximum runout
for Pickup is .030" (.76 mm). Maximum runout for all other models is .\
020" (.51 mm). Replace drive shaft if maximum runout is exceeded.
BALANCING DRIVE SHAFT
1) Perform following procedure only after inspecting all
other possible causes of vibration. See INSPECTION. Drive shaft
imbalance may often be cured by disconnecting shaft, rotating it 180
degrees and reconnecting shaft to flange. Test drive to check results.
NOTE: DO NOT run engine for prolonged periods without forced
airflow across radiator. Engine or transmission may
overheat.
2) To balance drive shaft(s), begin by raising rear wheels
off ground and turning drive shaft with engine. Balance testing may be
done by marking drive shaft in 4 positions, 90 degrees apart around
shaft. Place marks about 6" forward of rear flange/yoke weld. Number
marks 1-4.
3) Install large diameter screw-type hose clamp around drive
shaft so clamp's head is in No. 1 position. Spin drive shaft with
engine and note vibrations. If there is little or no change in
vibration intensity, move clamp head to No. 2 position, and repeat
test.
4) Continue procedure until vibration is at lowest level. If
no difference is noted with clamp head moved to all 4 positions,
vibrations may not be due to drive shaft imbalance.
5) If vibration decreases but is not completely eliminated,
place a second clamp at same position, and repeat test. Combined
weight of both clamps in one position may increase vibration. If so,
rotate clamps 1/2" apart, above and below lowest vibration level
position, and repeat test.
6) Continue to rotate clamps, as necessary, until vibration
is at lowest point. If vibration can be eliminated or reduced to
acceptable level, bend back slack end of clamp so screw cannot loosen.
If vibration level is still unacceptable, leave rear clamp(s) in
place, and repeat procedure at front end of drive shaft. Road test
vehicle. On 4WD models, perform procedure on each shaft.
CHECKING VERTICAL ANGLE
One-Piece Drive Shafts
1) Raise and support vehicle so rear wheels can be rotated.
Rotate drive shaft so a pinion flange bearing cap faces downward.
Attach Inclinometer (C-4224) magnet to bearing cap, and measure drive
shaft vertical angle. See Fig. 4. Remove inclinometer.
2) Rotate drive shaft 90 degrees until drive shaft rear yoke
bearing cap faces downward. Attach inclinometer magnet to bearing cap,
and measure drive shaft vertical angle. Difference between 2 measured
angles is drive shaft rear angle. See Fig. 5. Remove inclinometer.
3) 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. Remove inclinometer.

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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