engine DODGE RAM 2001 Service Owner's Guide

26,250 Miles (42 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
30,000 Miles (48 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Inspect fan hub.
²Inspect damper.
²Inspect water pump weep hole for blockage.
²Replace fuel filter and clean water in fuel sen-
sor.
²Drain and refill automatic transmission fluid.
Replace filter and adjust bands.
²Change rear axle fluid.
²Change front axle fluid (4x4).
²Inspect front wheel bearings. Clean and repack,
if required (4x2).
²Inspect brake linings.
33,700 Miles (54 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
37,500 Miles (60 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Replace fuel filter and clean water in fuel sen-
sor.
41,250 Miles (66 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
45,000 Miles (72 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Inspect drive belts, replace as necessary.
²Inspect water pump weep hole for blockage.
²Replace fuel filter and clean water in fuel sen-
sor.
²Drain and refill automatic transmission fluid.
Replace filter and adjust bands.
²Drain and refill transfer case fluid.
²Change rear axle fluid.
²Change front axle fluid (4x4).
²Inspect brake linings.
48,750 Miles (78,000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
52,500 Miles (84 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Replace fuel filter and clean water in fuel sen-
sor.
56,250 Miles (90 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
60,000 Miles (96 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Inspect fan hub.
²Inspect damper.
²Inspect water pump weep hole for blockage.
²Replace fuel filter and clean water in fuel sen-
sor.
²Drain and refill automatic transmission fluid.
Replace filter and adjust bands.
²Change rear axle fluid.
²Change front axle fluid (4x4).
²Inspect front wheel bearings. Clean and repack
if required (4x2).
²Inspect brake linings.
²Flush and replace engine coolant.
63,750 Miles (102 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
67,500 Miles (108 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Inspect drive belts, replace as necessary.
²Replace fuel filter and clean water in fuel sen-
sor.
71,250 Miles (114 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
75,000 Miles (120 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Inspect water pump weep hole for blockage.
²Replace fuel filter and clean water in fuel sen-
sor.
²Drain and refill automatic transmission fluid.
Replace filter and adjust bands.
²Change rear axle fluid.
²Change front axle fluid (4x4).
²Inspect brake linings.
78,750 Miles (126 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
82,500 Miles (132 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Replace fuel filter and clean water in fuel sen-
sor.
BR/BELUBRICATION & MAINTENANCE 0 - 25
MAINTENANCE SCHEDULES (Continued)

86,250 Miles (138 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
90,000 Miles (144 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Inspect drive belts, replace as necessary.
²Inspect fan hub.
²Inspect damper.
²Inspect water pump weep hole for blockage.
²
Replace fuel filter and clean water in fuel sensor.
²Drain and refill automatic transmission fluid.
Replace filter and adjust bands.
²Drain and refill transfer case fluid.
²Change rear axle fluid.
²Change front axle fluid (4x4).
²Inspect front wheel bearings. Clean and repack
if required (4x2).
²Inspect brake linings.
93,750 Miles (150 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
97,500 Miles (156 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Flush and replace engine coolant.
²Replace fuel filter and clean water in fuel sen-
sor.
²Adjust rear brakes.
101,250 Miles (162 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
105,000 Miles (168 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Inspect water pump weep hole for blockage.
²Replace fuel filter and clean water in fuel sen-
sor.
²Drain and refill automatic transmission fluid.
Replace filter and adjust bands.
²Change rear axle fluid.
²Change front axle fluid (4x4).
²Inspect brake linings.
108,750 Miles (174 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
112,500 Miles (180 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Inspect drive belts, replace as necessary.²
Replace fuel filter and clean water in fuel sensor.
116,250 Miles (186 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
120,000 Miles (192 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Inspect fan hub.
²Inspect damper.
²Inspect water pump weep hole for blockage.
²Replace fuel filter and clean water in fuel sen-
sor.
²Drain and refill automatic transmission fluid.
Replace filter and adjust bands.
²Change rear axle fluid.
²Change front axle fluid (4x4).
²Inspect front wheel bearings. Clean and repack
if required (4x2).
²Inspect brake linings.
123,750 Miles (198 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
127,500 Miles (204 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Replace fuel filter and clean water in fuel sen-
sor.
131,250 Miles (210 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
135,000 Miles (216 000 km)
²Change engine oil and filter.
²Drain crankcase breather canister (if equipped).
²Clean inside of engine air cleaner element hous-
ing.
²Inspect drive belts, replace as necessary.
²Inspect water pump weep hole for blockage.
²Replace fuel filter and clean water in fuel sen-
sor.
²Adjust valve lash clearance
²Drain and refill automatic transmission fluid.
Replace filter and adjust bands.
²Drain and refill transfer case fluid.
²Change rear axle fluid.
²Change front axle fluid (4x4).
²Inspect brake linings.
²Flush and replace engine coolant.
²Adjust rear brakes
Inspection and service should also be performed
anytime a malfunction is observed or suspected.
0 - 26 LUBRICATION & MAINTENANCEBR/BE
MAINTENANCE SCHEDULES (Continued)

JUMP STARTING
STANDARD PROCEDURE
WARNING: REVIEW ALL SAFETY PRECAUTIONS
AND WARNINGS IN GROUP 8A, BATTERY/START-
ING/CHARGING SYSTEMS DIAGNOSTICS. DO NOT
JUMP START A FROZEN BATTERY, PERSONAL
INJURY CAN RESULT. DO NOT JUMP START WHEN
MAINTENANCE FREE BATTERY INDICATOR DOT IS
YELLOW OR BRIGHT COLOR. DO NOT JUMP
START A VEHICLE WHEN THE BATTERY FLUID IS
BELOW THE TOP OF LEAD PLATES. DO NOT
ALLOW JUMPER CABLE CLAMPS TO TOUCH
EACH OTHER WHEN CONNECTED TO A BOOSTER
SOURCE. DO NOT USE OPEN FLAME NEAR BAT-
TERY. REMOVE METALLIC JEWELRY WORN ON
HANDS OR WRISTS TO AVOID INJURY BY ACCI-
DENTAL ARCING OF BATTERY CURRENT. WHEN
USING A HIGH OUTPUT BOOSTING DEVICE, DO
NOT ALLOW BATTERY VOLTAGE TO EXCEED 16
VOLTS. REFER TO INSTRUCTIONS PROVIDED
WITH DEVICE BEING USED.
CAUTION: When using another vehicle as a
booster, do not allow vehicles to touch. Electrical
systems can be damaged on either vehicle.
TO JUMP START A DISABLED VEHICLE:
(1) Raise hood on disabled vehicle and visually
inspect engine compartment for:
²Battery cable clamp condition, clean if necessary.
²Frozen battery.
²Yellow or bright color test indicator, if equipped.
²Low battery fluid level.
²Generator drive belt condition and tension.
²Fuel fumes or leakage, correct if necessary.
CAUTION: If the cause of starting problem on dis-
abled vehicle is severe, damage to booster vehicle
charging system can result.
(2) When using another vehicle as a booster
source, park the booster vehicle within cable reach.
Turn off all accessories, set the parking brake, place
the automatic transmission in PARK or the manual
transmission in NEUTRAL and turn the ignition
OFF.(3) On disabled vehicle, place gear selector in park
or neutral and set park brake. Turn off all accesso-
ries.
(4) Connect jumper cables to booster battery. RED
clamp to positive terminal (+). BLACK clamp to neg-
ative terminal (-). DO NOT allow clamps at opposite
end of cables to touch, electrical arc will result.
Review all warnings in this procedure.
(5) On disabled vehicle, connect RED jumper cable
clamp to positive (+) terminal. Connect BLACK
jumper cable clamp to engine ground as close to the
ground cable attaching point as possible (Fig. 7)and
(Fig. 8).
(6) Start the engine in the vehicle which has the
booster battery, let the engine idle a few minutes,
then start the engine in the vehicle with the dis-
charged battery.
CAUTION: Do not crank starter motor on disabled
vehicle for more than 15 seconds, starter will over-
heat and could fail.
(7) Allow battery in disabled vehicle to charge to
at least 12.4 volts (75% charge) before attempting to
start engine. If engine does not start within 15 sec-
onds, stop cranking engine and allow starter to cool
(15 min.), before cranking again.
Fig. 7 Jumper Cable Clamp ConnectionsÐGas
Engine
1 - NEGATIVE OR GROUND CABLE CONNECTION
2 - POSITIVE CABLE CONNECTION
3 - BATTERY
BR/BELUBRICATION & MAINTENANCE 0 - 27

DISCONNECT CABLE CLAMPS AS FOLLOWS:
²Disconnect BLACK cable clamp from engine
ground on disabled vehicle.
²When using a Booster vehicle, disconnect
BLACK cable clamp from battery negative terminal.
Disconnect RED cable clamp from battery positive
terminal.
²Disconnect RED cable clamp from battery posi-
tive terminal on disabled vehicle.
HOISTING
STANDARD PROCEDURE
Refer to the Owner's Manual for emergency vehicle
lifting procedures.
WARNING: THE HOISTING AND JACK LIFTING
POINTS PROVIDED ARE FOR A COMPLETE VEHI-
CLE. WHEN A CHASSIS OR DRIVETRAIN COMPO-
NENT IS REMOVED FROM A VEHICLE, THE
CENTER OF GRAVITY IS ALTERED MAKING SOME
HOISTING CONDITIONS UNSTABLE. PROPERLY
SUPPORT (Fig. 9) OR SECURE VEHICLE TO HOIST-
ING DEVICE WHEN THESE CONDITIONS EXIST.
FLOOR JACK
When properly positioned, a floor jack can be used
to lift a vehicle (Fig. 10). Support the vehicle in the
raised position with jack stands at the front and rear
ends of the frame rails (Fig. 9).CAUTION: Do not lift vehicle with a floor jack posi-
tioned under:
²An axle tube.
²A body side sill.
²A steering linkage component.
²A drive shaft.
²The engine or transmission oil pan.
²The fuel tank.
²A front suspension arm.
NOTE: Use the correct frame rail lifting locations
only (Fig. 11).
HOIST
A vehicle can be lifted with:
²A single-post, frame-contact hoist.
²A twin-post, chassis hoist.
²A ramp-type, drive-on hoist.
Fig. 8 Jumper Cable Clamp ConnectionsÐDiesel
Engine
1 - POSITIVE CABLE CONNECTION
2 - BATTERY
3 - NEGATIVE OR GROUND CABLE CONNECTION
Fig. 9 Safety Stands
1 - SAFETY STANDS
0 - 28 LUBRICATION & MAINTENANCEBR/BE
JUMP STARTING (Continued)

down several times. Always release the bumper in
the down position.Set the front end alignment to
specifications while the vehicle is in its NOR-
MALLY LOADED CONDITION.
Camber and caster angle adjustments involve
changing the position of the upper suspension arm
pivot bar (Fig. 3). Refer to the Alignment Specifica-
tion Chart for the correct setting.
CASTER:Move the rear position of the pivot bar
in or out. This will change the caster angle signifi-
cantly and camber angle only slightly. To retain cam-
ber move the forward pivot very slightly in the
opposite direction.
NOTE: For example, to increase a positive caster
angle, move the rear position of the pivot bar
inward (toward the engine). Move the front of pivot
bar outward (away from the engine) slightly until
the original camber angle is obtained.CAMBER:Move the forward position of the pivot
bar in or out. This will change the camber angle sig-
nificantly and caster angle only slightly. The camber
angle should be adjusted as close as possible to the
preferred service specification. After adjustment
is made tighten pivot bar nuts to specifications.
TOE POSITION:The wheel toe position adjust-
ment should be the final adjustment.
(1) Start the engine and turn wheels both ways
before straightening the wheels. Center and secure
the steering wheel and turn off engine.
(2) Loosen the tie rod adjustment sleeve clamp
bolts/nuts.
NOTE: Each front wheel should be adjusted for
one-half of the total toe position specification. This
will ensure the steering wheel will be centered
when the wheels are positioned straight-ahead.
(3) Adjust the wheel toe position by turning the tie
rod adjustment sleeves as necessary.
STANDARD PROCEDURES - CASTER
CORRECTION MEASUREMENT
NOTE: To determine the correct caster alignment
angle for Cab-Chassis vehicles the following proce-
dure must be performed.
NOTE: 4x2 11000 GVW has a solid front axle and
uses a 4x4 frame.
(1) Take a height measurement to the center of the
front gauge hole in the frame. Take another measure-
ment to the center of the rear spring hanger bolt
(Fig. 4). Take these measurements on both sides of
the vehicle.
(2) Subtract the front measurement from the rear
measurement and use the average between the right
and left side. Use this number (caster correlation
valve) with the Corrected Caster Chart to obtain the
preferred caster angle.
Fig. 3 Caster Camber Adjustment Location
1 - PIVOT BAR
2 - UPPER SUSPENSION ARM
3 - SUSPENSION ARM FRAME MOUNT
4 - ADJUSTMENT SLOTS
BR/BEWHEEL ALIGNMENT 2 - 3
WHEEL ALIGNMENT (Continued)

CORRECTED CASTER CHART-CAB CHASSIS
Caster
Correlation
Value
(inches)4x2 8800
lb. GVW
134.7 in.
wheel
base4x4 8800
lb. GVW
4x2 & 4x4
11000 lb.
GVW
134.7 &
138.7 in.
wheel
base4x2 & 4x4
11000 lb.
GVW 162.7
in. wheel
base
Caster61
deg.Caster61
deg.Caster61
deg.
þ5.00 4.27É 3.77É 3.81É
þ4.75 4.39É 3.89É 3.91É
þ4.50 4.51É 4.01É 4.01É
þ4.25 4.64É 4.14É 4.11É
þ4.00 4.76É 4.26É 4.21É
þ3.75 4.88É 4.38É 4.31É
þ3.50 5.00É 4.50É 4.41É
þ3.25 5.12É 4.62É 4.51É
þ3.00 5.25É 4.75É 4.61É
þ2.75 5.37É 4.87É 4.71É
þ2.50 5.49É 4.99É 4.81É
þ2.25 5.61É 5.11É 4.91É
þ2.00 5.74É 5.24É 5.01É
þ1.75 5.86É 5.36É 5.11É
þ1.50 5.98É 5.48É 5.21É
þ1.25 6.10É 5.60É 5.31É
þ1.00 6.23É 5.73É 5.41É
þ0.75 6.33É 5.83É 5.51É
þ0.50 6.47É 5.97É 5.61É
þ0.25 6.59É 6.09É 5.71É
0.00 6.71É 6.21É 5.81É
STANDARD PROCEDURES - ALIGNMENT
LINK/COIL SUSPENSION
Before each alignment reading the vehicle should
be jounced (rear first, then front). Grasp each
bumper at the center and jounce the vehicle up and
down several times. Always release the bumper in
the down position.Set the front end alignment to
specifications while the vehicle is in its NOR-
MALLY LOADED CONDITION.
CAMBER:The wheel camber angle is preset and
is not adjustable.
CASTER:Check the caster of the front axle for
correct angle. Be sure the axle is not bent or twisted.Road test the vehicle and make left and right turn.
Observe the steering wheel return-to-center position.
Low caster will cause poor steering wheel returnabil-
ity.
Caster can be adjusted by rotating the cams on the
lower suspension arm (Fig. 5). (Refer to 2 - SUSPEN-
SION/WHEEL ALIGNMENT - STANDARD PROCE-
DURE).
TOE POSITION:The wheel toe position adjust-
ment should be the final adjustment.
(1) Start the engine and turn wheels both ways
before straightening the wheels. Center and Secure
the steering wheel and turn off engine.
(2) Loosen the adjustment sleeve clamp bolts.
(3) Adjust the right wheel toe position with the
drag link. Turn the sleeve until the right wheel is at
the correct TOE-IN position. Position clamp bolts to
their original position and tighten to specifications.
Make sure the toe setting does not change dur-
ing clamp tightening.
(4) Adjust left wheel toe position with tie rod at
left knuckle. Turn the sleeve until the left wheel is at
the correct TOE-IN position. Position clamp bolts to
their original position and tighten to specifications.
Make sure the toe setting does not change dur-
ing clamp tightening.
(5) Verify the right toe setting.
Fig. 5 Adjustment Cam
1 - ADJUSTMENT CAM
2 - AXLE BRACKET
3 - BRACKET REINFORCEMENT
4 - LOWER SUSPENSION ARM
BR/BEWHEEL ALIGNMENT 2 - 5
WHEEL ALIGNMENT (Continued)

SHOCK
DESCRIPTION
The shocks are mounted inside the springs and
attached at the top to brackets with grommets. These
brackets are bolted on the frame with three studs on
a ring. The shock is mounted at the bottom of the
axle below the spring seat.
OPERATION
The shock absorbers dampen the jounce and
rebound of the vehicle over various road conditions.
DIAGNOSIS AND TESTING - SHOCK
A knocking or rattling noise from a shock absorber
may be caused by movement between mounting
bushings and metal brackets or attaching compo-
nents. These noises can usually be stopped by tight-
ening the attaching nuts. If the noise persists,
inspect for damaged and worn bushings, and attach-
ing components. Repair as necessary if any of these
conditions exist.
A squeaking noise from the shock absorber may be
caused by the hydraulic valving and may be intermit-
tent. This condition is not repairable and the shock
absorber must be replaced.
The shock absorbers are not refillable or adjust-
able. If a malfunction occurs, the shock absorbermust be replaced. To test a shock absorber, hold it in
an upright position and force the piston in and out of
the cylinder four or five times. The action throughout
each stroke should be smooth and even.
The shock absorber bushings do not require any
type of lubrication. Do not attempt to stop bushing
noise by lubricating them. Grease and mineral oil-
base lubricants will deteriorate the bushing.
REMOVAL
(1) Remove the nut, retainer and grommet from
the upper stud in the engine compartment.
(2) Remove three nuts from the upper shock
bracket (Fig. 16) .
(3) Remove the lower bolt from the axle bracket
(Fig. 17) . Remove the shock absorber from engine
compartment.
INSTALLATION
(1) Position the lower retainer and grommet on the
upper stud. Insert the shock absorber through the
spring from engine compartment.
(2) Install the lower bolt and tighten to 135 N´m
(100 ft. lbs.).
(3) Install the upper shock bracket and three nuts.
Tighten nuts to 75 N´m (55 ft. lbs.).
Fig. 15 Cam Adjuster
1 - ADJUSTMENT CAM
2 - AXLE BRACKET
3 - BRACKET REINFORCEMENT
4 - LOWER SUSPENSION ARM
Fig. 16 Shock Absorber and Bracket
1 - GROMMET
2 - RETAINER
3 - BRACKET
4 - RETAINER
5 - SHOCK
6 - GROMMET
BR/BEFRONT - 4WD 2 - 21
LOWER CONTROL ARM (Continued)

DIFFERENTIAL & DRIVELINE
TABLE OF CONTENTS
page page
PROPELLER SHAFT.......................1
FRONT AXLE - 216FBI....................12
FRONT AXLE - 248FBI....................45
REAR AXLE-91/4.......................77REAR AXLE - 248RBI....................109
REAR AXLE - 267RBI....................140
REAR AXLE - 286RBI....................169
PROPELLER SHAFT
TABLE OF CONTENTS
page page
PROPELLER SHAFT
DESCRIPTION............................1
OPERATION.............................1
DIAGNOSIS AND TESTING..................3
PROPELLER SHAFT.....................3
STANDARD PROCEDURE...................5
SPECIFICATIONS.........................8
SPECIAL TOOLS..........................8
PROPELLER SHAFT - FRONT
REMOVAL...............................8
INSTALLATION............................8PROPELLER SHAFT - REAR
REMOVAL...............................9
INSTALLATION............................9
CENTER BEARING
DESCRIPTION...........................10
OPERATION.............................10
REMOVAL..............................10
INSTALLATION...........................10
ADJUSTMENTS..........................10
SINGLE CARDAN UNIVERSAL JOINTS
DISASSEMBLY...........................11
PROPELLER SHAFT
DESCRIPTION
A propeller shaft (Fig. 1), (Fig. 2), (Fig. 3), and
(Fig. 4) is a shaft which connects the transmission/
transfer case to the axle differential. This is the link
through which the engine power is transmitted to the
axle.
The propeller shaft is designed and built with the
yoke lugs in line with each other which is called zero
phasing. This design produces the smoothest running
condition, an out-of-phase shaft can cause a vibra-
tion.
Tubular propeller shafts are balanced by the man-
ufacturer with weights spot welded to the tube.
Use the exact replacement parts when installing
the propeller shafts. The use of the correct replace-
ment parts helps to ensure safe operation. All fasten-
ers must be torqued to the specified values for safe
operation.Also make alignment reference marks (Fig. 5)on
the propeller shaft yoke and axle, or transmission,
yoke prior to servicing. This helps to eliminate possi-
ble vibration.
CAUTION: Do not allow the propeller shaft to drop
or hang from any propeller shaft joint during
removal. Attach the propeller shaft to the vehicle
underside with wire to prevent damage to the joints.
OPERATION
The propeller shaft must operate through con-
stantly changing relative angles between the trans-
mission and axle. It must also be capable of changing
length while transmitting torque. The axle rides sus-
pended by springs in a floating motion. The propeller
shaft must be able to change operating angles when
going over various road surfaces. This is accom-
plished through universal joints, which permit the
propeller shaft to operate at different angles. The slip
joints (or yokes) permit contraction or expansion.
BR/BEDIFFERENTIAL & DRIVELINE 3 - 1

Before undercoating a vehicle, the propeller
shaft and the U-joints should be covered to pre-
vent an out-of-balance condition and driveline
vibration.
CAUTION: Use original equipment replacement
parts for attaching the propeller shafts. The speci-
fied torque must always be applied when tightening
the fasteners.
DIAGNOSIS AND TESTING - PROPELLER
SHAFT
VIBRATION
Tires that are out-of-round, or wheels that are
unbalanced, will cause a low frequency vibration.
(Refer to 22 - TIRES/WHEELS - DIAGNOSIS AND
TESTING)
Brake drums that are unbalanced will cause a
harsh, low frequency vibration. (Refer to 5 - BRAKES
- DIAGNOSIS AND TESTING)
Driveline vibration can also result from loose or
damaged engine mounts.
Propeller shaft vibration increases as the vehicle
speed is increased. A vibration that occurs within a
specific speed range is not usually caused by a pro-
peller shaft being unbalanced. Defective universal
joints, or an incorrect propeller shaft angle, are usu-
ally the cause of such a vibration.
Fig. 3 Rear Propeller Shaft - Dana Axles
1 - SLIDING YOKE
2 - PROPELLER SHAFT
3 - PINION YOKE
4 - CLAMP
5 - SCREW
6 - OUTPUT SHAFT
Fig. 4 Rear Propeller Shaft - Corporate Axles
1 - COMPANION FLANGE
2 - COMPANION YOKE
3 - REAR PROPELLER SHAFT
Fig. 5 Propeller Shaft And Yoke
1 - REFERENCE MARKS
BR/BEPROPELLER SHAFT 3 - 3
PROPELLER SHAFT (Continued)

DRIVELINE VIBRATION
Drive Condition Possible Cause Correction
Propeller Shaft Noise 1) Undercoating or other foreign
material on shaft.1) Clean exterior of shaft and wash
with solvent.
2) Loose U-joint clamp screws. 2) Install new clamps and screws
and tighten to proper torque.
3) Loose or bent U-joint yoke or
excessive runout.3) Install new yoke.
4) Incorrect driveline angularity. 4) Measure and correct driveline
angles.
5) Rear spring center bolt not in
seat.5) Loosen spring u-bolts and seat
center bolt.
6) Worn U-joint bearings. 6) Install new U-joint.
7) Propeller shaft damaged or out
of balance.7) Installl new propeller shaft.
8) Broken rear spring. 8) Install new rear spring.
9) Excessive runout or unbalanced
condition.9) Re-index propeller shaft, test,
and evaluate.
10) Excessive drive pinion gear
shaft runout.10) Re-index propeller shaft and
evaluate.
11) Excessive axle yoke deflection. 11) Inspect and replace yoke if
necessary.
12) Excessive transfer case runout. 12) Inspect and repair as necessary.
Universal Joint Noise 1) Loose U-joint clamp screws. 1) Install new clamps and screws
and tighten to proper torque.
2) Lack of lubrication. 2) Replace as U-joints as
necessary.
BALANCE
NOTE: Removing and re-indexing the propeller
shaft 180É relative to the yoke may eliminate some
vibrations.
If propeller shaft is suspected of being unbalanced,
it can be verified with the following procedure:
(1) Raise the vehicle.
(2) Clean all the foreign material from the propel-
ler shaft and the universal joints.
(3) Inspect the propeller shaft for missing balance
weights, broken welds, and bent areas.If the pro-
peller shaft is bent, it must be replaced.
(4) Inspect the universal joints to ensure that they
are not worn, are properly installed, and are cor-
rectly aligned with the shaft.
(5) Check the universal joint clamp screws torque.
(6) Remove the wheels and tires. Install the wheel
lug nuts to retain the brake drums or rotors.
(7) Mark and number the shaft six inches from the
yoke end at four positions 90É apart.(8) Run and accelerate the vehicle until vibration
occurs. Note the intensity and speed the vibration
occurred. Stop the engine.
(9) Install a screw clamp at position 1 (Fig. 6).
(10) Start the engine and re-check for vibration. If
there is little or no change in vibration, move the
clamp to one of the other three positions. Repeat the
vibration test.
(11) If there is no difference in vibration at the
other positions, the source of the vibration may not
be propeller shaft.
(12) If the vibration decreased, install a second
clamp (Fig. 7) and repeat the test.
(13) If the additional clamp causes an additional
vibration, separate the clamps (1/2 inch above and
below the mark). Repeat the vibration test (Fig. 8).
(14) Increase distance between the clamp screws
and repeat the test until the amount of vibration is
at the lowest level. Bend the slack end of the clamps
so the screws will not loosen.
3 - 4 PROPELLER SHAFTBR/BE
PROPELLER SHAFT (Continued)