VTD Model
- Insert the rear drive shaft into the reduction drive gear and center differential assembly.
- 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 in)
A: Measured value
B: ST thickness [15 mm (0.59 in)]
L: Distance from end of extension case to end of rear drive shaft
- Measure the distance "l" from the transmission case mating surface to the reduction drive gear end surface with ST.
l = Measured value - 15 mm
(l = Measured value - 0.59 in)
ST 398643600 GAUGE
Fig 3: Measure Distance "l" From Transmission Case Mating Surface To Reduction Drive Gear End Surface With STCourtesy of SUBARU OF AMERICA, INC.
A: Measured value
B: ST thickness [15 mm (0.59 in)]
l : Distance from end of extension case to end of reduction drive gear
- Calculation equation:NOTE: Calculating H:
When clearance is at 0.05 mm (0.0020 in) and 0.25 mm (0.0098 in), then select up to 4 shims from the table so that their total thickness matches the clearance.
H = (L + 0.45 mm) - l - T
[H = (L + 0.0177 in) - l - T]
T: Shim clearance
L: Distance from end of extension case to end of rear drive shaft
0.45 mm (0.0177 in): Gasket thickness
l : Distance from end of transmission case to end of reduction drive gear
T: Shim thickness 0.05 - 0.25 mm (0.0020 - 0.0098 in)
Example:
When, L = 90.50 mm (3.5360 in), l = 90.35 mm (3.5571 in)
Calculation when clearance is 0.05 mm (0.0020 in)
H = (90.50 + 0.45) - 90.35 - 0.05 = 0.55
[H = (3.5630 + 0.0177) - 3.5571 - 0.0020 = 0.0217]
Calculation when clearance is 0.25 mm (0.0098 in)
H = (90.50 + 0.45) - 90.35 - 0.25 = 0.35
[H = (3.5630 + 0.0177) - 3.5571 - 0.0098 = 0.0138]
After calculation, the value of H becomes between 0.35 mm (0.0138 in) - 0.55 mm (0.0217 in), therefore select either 2 shims of a thickness 0.2 mm (0.010 in) each, or 1 shim 0.5 mm (0.020 in) thick.