Subaru Legacy 2004 Service Manual page 2424

AUTOMATIC TRANSMISSION
27.Multi-Plate Clutch
A: REMOVAL
Remove the multi-plate clutch following the same
instructions as for the extension case. <Ref. to
5AT-72, REMOVAL, Extension Case & Intermedi-
ate Case.>
B: INSTALLATION
Install the multi-plate clutch following the same in-
structions as for the extension case. <Ref. to 5AT-
72, INSTALLATION, Extension Case & Intermedi-
ate Case.>
C: INSPECTION
• Inspect the drive plate facing for wear and dam-
age.
• Inspect the snap ring for wear; return spring for
permanent distortion, breakage and deformation.
• Inspect the damage for D-ring.
• Measure the multi-plate clutch clearance and ad-
just it within specification. <Ref. to 5AT-76, AD-
JUSTMENT, Multi-Plate Clutch.>
D: ADJUSTMENT
1) Remove drive plate and driven plate from center
differential carrier.
2) Measure the depth "A" from mating surface of
extension case to multi-plate clutch (LSD) piston.
A
A Measured value
3) Using the ST, measure the height "B" from inter-
mediate case mating surface to end of center differ-
ential clutch drum, and then subtract the thickness
of ST gauge (50 mm (1.97 in)) from measured val-
ue.
ST 378744300 GAUGE
Multi-Plate Clutch
NOTE:
Measure with driven plate No. 3 removed.
4) Calculation formula:
When clearances are 0.2 mm (0.008 in):
T (mm) = A " (B " 0.28) " 0.2
[T (in) = A " (B " 0.011) " 0.008]
When clearances are 0.6 mm (0.024 in):
T (mm) = A " (B " 0.28) " 0.6
[T (in) = A " (B " 0.011) " 0.024]
NOTE:
• Calculation formula for "T" is applied when mea-
suring using ST (398643600 GAUGE, 398744300
GAUGE). When not using ST, apply following.
When clearances are 0.2 mm (0.008 in):
T (mm) = A " (B " # " 0.28) " 0.2
[T (in) = A " (B " # " 0.011) " 0.008]
When clearances are 0.6 mm (0.024 in):
T (mm) = A " (B " # " 0.28) " 0.6
[T (in) = A " (B " # " 0.011) " 0.024]
T: Thickness of driven plate No. 3
A: Measure the depth from mating surface of exten-
sion case to multi-plate clutch (LSD) piston
B: Height from end of intermediate case to center
differential clutch drum
AT-01966
#: Collar thickness used when measuring "B"
0.28 (0.011): Gasket thickness (Unit mm (in))
• Measure multi-plate clutch (LSD) driven and
drive plate thickness to find the clearance between
measurement value and "T".
Standard value:
0.2 — 0.6 mm (0.008 — 0.024 in)
If outside the standard value, replace the plate set
(drive and driven plate) and select the driven plate
No. 3 to bring clearance within the standard value.
5AT-76
B Measured value
Driven plate No. 3
Part Number
31589AA041
31589AA050
31589AA060
31589AA070
B
AT-01967
Thickness mm (in)
1.6 (0.063)
2.0 (0.079)
2.4 (0.094)
2.8 (0.110)