Multi-Plate Clutch: Adjustment
- Remove the drive plate and driven plate from the center differential carrier.
- Measure the distance "L" from mating surface of extension case to multi-plate clutch (LSD) piston with ST.
ST 398643600 GAUGE
L = Measured value - 15 mm
(L = Measured value - 0.59 in)
Courtesy of SUBARU OF AMERICA, INC.
Measured value
ST thickness [15 mm (0.59 in)]
L: Distance from end of extension case to end of rear drive shaft
- Measure the height "l" from mating surface of the transmission case to end surface of the center differential clutch drum with ST.
ST 398744300 GAUGE
l = Measured value - 50 mm
(l = Measured value - 1.97 in)
Courtesy of SUBARU OF AMERICA, INC.
Measured value
ST thickness [50 mm (1.97 in)]
l: Distance from mating surface of transmission case to multi-plate clutch (LSD) piston
- Calculation equation:
T = (L + 0.45 mm) - l
[T= (L+ 0.0177 in) - l]
T: Measurements between end surface of clutch drum and multi-plate clutch (LSD) piston.
L: Distance from mating surface of extension case to multi-plate clutch (LSD) piston.
0.45: Gasket thickness
l: Distance from mating surface of transmission case to end surface of the center differential clutch drum.
NOTE: Measure thickness of driven and drive plates of multi-plate clutch (LSD) and determine clearance between measured value and "T".Standard value:
0.2 - 0.6 mm (0.008 - 0.024 in)
Allowable limit:
1.6 mm (0.063 in)
If out of specification, replace plate set (drive and driven plate) and select a multi-plate clutch (LSD) piston side adjusting plate to make it within specification.
AVAILABLE DRIVEN PLATES SPECIFICATIONAvailable driven plates 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)