Impreza F4-2.5L SOHC (2003)
Clutch: Service and Repair
Multi-Plate Clutch
Multi-plate Clutch
REMOVAL
Remove the multi-plate clutch in the same manner as with the extension case.
INSTALLATION
Install the multi-plate clutch in the same manner as with the extension case.
INSPECTION
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Check the drive plate facing for wear and damage.
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Check the snap ring for wear, and the return spring for permanent set, breakage and deformation.
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Check the D ring for damage.
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Measure the mutli-plate clutch clearance and adjust to within specifications.
ADJUSTMENT
1) Remove drive plates and driven plates from the center differential carrier.
2) Measure distance L from extension case mating surface to multi-plate clutch (LSD) piston with ST.
ST 398643600 GAUGE L = Measured value - 15 mm (L = Measured value - 0.59 inch)
A: Measured value
B: ST thickness [15 mm (0.59 inch)]
L: Distance from end of extension case to end of rear drive shaft
3) Measure the distance " Q " from the transmission case mating surface to the center differential clutch drum end surface with ST.
ST 398744300 GAUGE
l = Measured value - 50 mm
(l = Measured value - 1.97 inch)
ST 398744300 GAUGE
A: Measured value
B: ST thickness [50 mm (1.97 inch)]
a: Measure distance from transmission case mating surface to multi-plate clutch (LSD) piston.
4) Calculation equation:
T = (L + 0.45 mm) - l
[T = (L + 0.0177 inch) - l]
T: Distance from clutch drum to multi-plate clutch (LSD) piston
L: Distance from extension case mating surface to multi-plate clutch (LSD) piston 0.45: Gasket thickness
a: Distance from transmission case mating surface to center differential clutch drum
NOTE: Measure the thickness of drive and driven plates of the multi-plate clutch (LSD) and obtain the clearance between the measured value and
"T".
Standard: 0.2 - 0.6 mm (0.008 - 0.024 inch)
Service limit: 1.6 mm (0.063 inch)