length INFINITI QX56 2004 Factory Workshop Manual

TF-134
CENTER CASE
Revision: August 20072004 QX56
CONTROL VALVE

Check resistance between terminals of 4WD solenoid valve, 2-
4WD shift solenoid valve and transfer fluid temperature sensor.
Refer to TF-95, "
Component Inspection" .

Check sliding faces of control valves and plugs for abnormality.
If any is found, replace the control valve assembly with new one.
Refer to TF-154, "
Control Valve" .
CAUTION:
Replace control valve body together with clutch return
spring as a set.

Check each control valve spring for damage or distortion, and
also check its free length, outer diameter and wire diameter. If
any damage or fatigue is found, replace control valve body with
new one. Refer to TF-154, "
Control Valve" .
CAUTION:
Replace control valve body together with clutch return spring
as a set.
CLUTCH

Check drive plate facings and driven plate for damage, cracks or
other abnormality. If any abnormalities are found, replace with
new one.

Check the thickness of drive plate facings and driven plate.
Refer to TF-153, "
CLUTCH" .
CAUTION:

Measure facing thickness at 3 points to take an average.

Check all the drive and driven plates.

Check return spring for damage or deformation.

Do not remove spring from the plate
PDIA0183E
SMT947C
SMT948C
SMT949C

CENTER CASE
TF-135
C
E
F
G
H
I
J
K
L
MA
B
TF
Revision: August 20072004 QX56

Check stamped mark shown in the figure. Then, check that free
length, (include thickness of plate) are within specifications. If
any abnormality is found, replace with new return spring assem-
bly of the same stamped number.
NOTE:
Specifications, refer to TF-153, "
CLUTCH" .
SDIA2176E

TF-154
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: August 20072004 QX56
*: Always check with the Parts Department for the latest parts information.
Control Valve
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information.
Control Valve Spring
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information.
Return Spring
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information.
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information.Mounting position
(Part name)Part number* Outer dia. Overall length
L1
(2-4 shift valve)31772 21X00 8.0 (0.315) 38.5 (1.516)
L2
(Clutch valve)31772 80X11 10.0 (0.394) 40.0 (1.575)
L4
(Pilot valve)31772 80X11 10.0 (0.394) 40.0 (1.575)
L5
(Regulator valve)31741 0W410 12.0 (0.472) 68.0 (2.677)
Mounting position
(Part name)Part number* Free length Outer dia. Overall length
L1
(2-4 shift valve spring)31742 2W500 31.85 (1.2539) 7.0 (0.276) 0.6 (0.024)
L2
(Clutch valve spring)31742 2W505 40.6 (1.598) 8.9 (0.350) 0.7 (0.028)
L4
(Pilot valve spring)31742 0W410 28.1 (1.106) 9.0 (0.354) 1.2 (0.047)
L5
(Regulator valve spring)31742 2W515 39.7 (1.563) 11.0 (0.433) 1.3 (0.051)
Stamped mark Part number* Free length
1 31521 7S111 42.7 (1.168)
2 31521 7S112 43.1 (1.697)
3 31521 7S113 43.6 (1.717)
4 31521 7S114 44.0 (1.731)
Stamped mark Part number* Free length Outer dia. Overall length
L1
(2-4 shift valve spring)31742 2W500 31.85 (1.2539) 7.0 (0.276) 0.6 (0.024)
L2
(Clutch valve spring)31742 2W505 40.6 (1.598) 8.9 (0.350) 0.7 (0.028)
L4
(Pilot valve spring)31742 0W410 28.1 (1.106) 9.0 (0.354) 1.2 (0.047)
L5
(Regulator valve spring)31742 2W515 39.7 (1.563) 11.0 (0.433) 1.3 (0.051)