Subaru IMPREZA GD 2007 Series Manual page 2586

asieps_tobira_IM_US.book 79 ページ ２０１２年１月１７日 火曜日 午後３時４８分
28.Multi-plate Clutch
A: REMOVAL
In the same manner as the extension case, remove
the multiplate clutch. <Ref. to 4AT-70, REMOVAL,
Extension Case.>
B: INSTALLATION
In the same manner as the extension case, install
the multiplate clutch. <Ref. to 4AT-70, INSTALLA-
TION, Extension Case.>
C: INSPECTION
• Inspect the drive plate facing for wear and dam-
age.
• Make sure the snap ring is not worn and the re-
turn spring has no permanent distortion, damage,
or deformation.
• Inspect the D-ring for damage.
• Measure the multiplate clutch clearance, and ad-
just so that it will be within the specification range.
<Ref. to 4AT-79, ADJUSTMENT, Multi-plate
Clutch.>
D: ADJUSTMENT
1) Install the drive plate and driven plate to the cen-
ter differential carrier.
2) Using the ST, measure distance "A" from the
end of the ST to the multiplate clutch piston.
ST 398643600 GAUGE
A Measured value
Multi-plate Clutch
3) Using the ST, measure the height "B" from the
transmission case mating surface to end of ST.
ST 398744300
4) Calculation formula:
T = A – B + 0.45 mm
[T = A – B + 0.0177 in]
Standard value:
0.2 — 0.6 mm (0.008 — 0.024 in)
Service limit:
1.6 mm (0.063 in)
If outside the standard value, replace the plate set
(drive and driven plate), and select the side adjust-
ment plates for the multiplate clutch piston so that
the value is within the standard.
ST
A
AT-01031
4AT-79
AUTOMATIC TRANSMISSION
GAUGE
B
B Measured value
Driven plate
Part No. Thickness mm (in)
31589AA041 1.6 (0.063)
31589AA050 2.0 (0.079)
31589AA060 2.4 (0.094)
31589AA070 2.8 (0.110)
ST
AT-01033