differential INFINITI QX56 2009 Factory Repair Manual

MA-28
< ON-VEHICLE MAINTENANCE >
CHASSIS AND BODY MAINTENANCE
1. Remove the filler plug and gasket from the rear final driveassembly.
2. Fill the rear final drive assembly with new differential gear oil until the level reaches the specified level near the filler plug hole.
3. Install the filler plug with a new gasket on it to the rear final drive assembly. Tighten to the specified torque. Refer to DLN-253,
"Disassembly and Assembly".
CAUTION:
Do not reuse gasket.
Balancing WheelsINFOID:0000000004215547
BALANCING WHEELS (ADHESIVE WEIGHT TYPE)
Preparation Before Adjustment
Remove inner and outer balance weights from the road wheel using releasing agent, remove double-faced
adhesive tape from the road wheel.
CAUTION:
• Be careful not scratch the road wheel during removal.
• After removing double-faced adhesive tape, wipe clean traces of releasing agent from the road
wheel.
Wheel Balance Adjustment
CAUTION:
• Use center hole cone-type clamping machines due to clad wheels.
• If a balancer machine has an adhesive weight mode se tting, select the adhesive weight mode setting and
skip Step 2. below. If a balancer machine only has the clip-on (rim flange) weight mode setting, follow Step 2.
to calculate the correct size adhesive weight.
1. Set road wheel on balancer machine using the center hole as a guide. Start the balancer machine.
2. For tire balance machines that only have a clip-on (rim flange) weight mode setting, follow this step to cal- culate the correct size adhesive weight to use. When inner and outer imbalance values are shown on the
balancer machine indicator, multiply outer imbalance value by 5/3 (1.67) to determine balance weight that
should be used. Select the outer balance weight with a value closest to the calculated value above and
install in to the designated outer position of, or at the designated angle in relation to the road wheel.
a. Indicated imbalance value × 5/3 (1.67) = balance weight to be
installed
Calculation example:
23 g (0.81 oz) × 5/3 (1.67) = 38.33 g (1.35 oz) ⇒ 40 g (1.41 oz)
balance weight (closer to calculated balance weight value)
NOTE:
Note that balance weight value must be closer to the calculated
balance weight value.
Example:
37.4 ⇒ 35 g (1.23 oz)
37.5 ⇒ 40 g (1.41 oz)
Differential gear oil
grade and capacity
: Refer to MA-12, "
Fluids and
Lubricants".
LLIA0068E
SMA054D
Revision: December 20092009 QX56

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGRAX-5
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
RAX
N
O P
SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHN ESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000003772257
Use chart below to help you find the cause of the symp tom. If necessary, repair or replace these parts.
×: Applicable
Reference page
—
RAX-9RAX-9—
RAX-7—
DLN-242, "NVH Troubleshooting Chart"
FAX-5, "NVH Troubleshooting Chart" FSU-5, "NVH Troubleshooting Chart"RSU-5, "NVH Troubleshooting Chart"WT-36, "NVH Troubleshooting Chart"WT-36, "NVH Troubleshooting Chart"DLN-194, "NVH Troubleshooting Chart"BR-6, "NVH Troubleshooting Chart"ST-12, "NVH Troubleshooting Chart"
Possible cause and SUSPECTED PARTS
Excessive joint angle
Joint sliding resistance
Imbalance
Improper installation, looseness
Parts interference
DIFFERENTIAL
FRONT AXLE
FRONT SUSPENSION
REAR SUSPENSION
TIRES
ROAD WHEEL
PROPELLER SHAFT
BRAKES
STEERING
Symptom Noise
×× ×× ××× ×××××
Shake × × ×× ×× ×××××
Vibration ×× ××× ××× ×
Shimmy ×× ×× ×× ××
Shudder × ××××××
Poor quality ride or handling ×× ××× ×× ×
Revision: December 20092009 QX56

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGRSU-5
< SYMPTOM DIAGNOSIS >
C
DF
G H
I
J
K L
M A
B
RSU
N
O P
SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHN ESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000003772289
Use chart below to help you find the cause of the symp tom. If necessary, repair or replace these parts.
×: ApplicableReference page
RSU-6RSU-6—
—
—
RSU-6RSU-6RSU-23
DLN-194, "NVH Troubleshooting Chart"DLN-242, "NVH Troubleshooting Chart"FAX-5, "NVH Troubleshooting Chart"FSU-5, "NVH Troubleshooting Chart"WT-36, "NVH Troubleshooting Chart"WT-36, "NVH Troubleshooting Chart"RAX-5, "NVH Troubleshooting Chart"BR-6, "NVH Troubleshooting Chart"ST-12, "NVH Troubleshooting Chart"
Possible cause and SUSPECTED PARTS
Improper installation, looseness
Shock absorber deformation, damage or deflection
Bushing or mounting deterioration
Parts interference
Spring fatigue
Suspension looseness
Incorrect wheel alignment
Stabilizer bar fatigue
PROPELLER SHAFT
DIFFERENTIAL
FRONT AXLE
FRONT SUSPENSION
TIRES
ROAD WHEEL
DRIVE SHAFT
BRAKES
STEERING
Symptom Noise
×××××× ××× ××××××
Shake ×××× × × × ××××××
Vibration ××××× × × ×× × ×
Shimmy ×××× × × ××× ××
Shudder ××× × ××× ××
Poor quality ride or handling ××××× ×× × ×××
Revision: December 20092009 QX56

WT-36
< SYMPTOM DIAGNOSIS >
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000003772398
Use the chart below to help you find the cause of the sy mptom. If necessary, repair or replace these parts.
×: ApplicableReference page
WT-40WT-41WT-45WT-40—
—
WT-45
FA X - 5 , "
NVH Troubleshooting Chart
" (FFD),
RAX-5, "
NVH Troubleshooting Chart
" (RFD)
FA X - 5 , "
NVH Troubleshooting Chart
" (FAX),
FSU-5, "
NVH Troubleshooting Chart
" (FSU)
RAX-5, "
NVH Troubleshooting Chart
" (RAX),
RSU-5, "
NVH Troubleshooting Chart
" (RSU)
Refer to TIRES in this chart.
Refer to ROAD WHEEL in this chart.
BR-6, "
NVH Troubleshooting Chart
"
ST-12, "
NVH Troubleshooting Chart
"
Possible cause and SUSPECTED PARTS
Out-of-round
Imbalance
Incorrect tire pressure
Uneven tire wear
Deformation or damage
Non-uniformity
Incorrect tire size
DIFFERENTIAL
FRONT AXLE AND FRONT SUSPENSION
REAR AXLE AND REAR SUSPENSION
TIRES
ROAD WHEEL
BRAKE
STEERING
Symptom TIRESNoise
× ××××× × × × × ××
Shake × ×××× × × × × ××
Vibration ××× ×××
Shimmy × ×××××× × × × ××
Shudder × ×××× × × × × ××
Poor quality ride or
handling × ×××× × × × ×
ROAD
WHEEL Noise
×× × ××× ×××
Shake ×× × ×× ×××
Shimmy, shudder ×× × ×× ×××
Poor quality ride or
handling ×× ×
×× ×
Revision: December 20092009 QX56