AT Main Case: Adjustment

1. Using the ST, measure the height "A" from AT main case mating surface to convex surface of oil pump cover.

   ST 499575400 GAUGE

   Fig 1: Measuring Height From AT Main Case Mating Surface To Convex Surface Of Oil Pump Cover

   Courtesy of SUBARU OF AMERICA, INC.
2. Using the ST, measure the depth "B" from the convex surface of oil pump cover to thrust bearing transferring surface.

   ST 499575400 GAUGE

   Fig 2: Measuring Depth From Convex Surface Of Oil Pump Cover To Thrust Bearing Transferring Surface

   Courtesy of SUBARU OF AMERICA, INC.
3. Calculate the measured value on step 1) and 2), and then set the calculated value as "C" Calculation formula: C = A - B
4. Using the ST, measure the depth "D" from AT main case mating surface to thrust bearing transferring surface of front sun gear.

   ST 499575400 GAUGE

   Fig 3: Measuring Depth From AT Main Case Mating Surface To Thrust Bearing Transferring Surface Of Front Sun Gear

   Courtesy of SUBARU OF AMERICA, INC.
5. Set the value as "E" which subtract the thickness of ST GAUGE from measured value on step 4).

   Calculation formula: E (mm) = D - 15

   [E (in) = D - 0.59]

6. Calculation formula:

   Select a thrust bearing from the table to adjust clearance within 0.25-0.55 mm (0.0098-0.022 in).

   When clearances are 0.25 mm (0.0098 in):

   T (mm) = E - C + 0.03

   [T (in) = E - C + 0.0012]

   When clearances are 0.55 mm (0.022 in):

   T (mm) = E - C - 0.27

   [T (in) = E - C - 0.012]

   T: Thrust bearing clearance

   C: Distance from oil pump cover mating surface to rear end of oil pump cover

   E: Depth from mating surface of AT main case to bearing surface of front sun gear

Example:

When the A is 39.50 mm (1.56 in), B is going to be 16.20 mm (0.64 in), so the C would be 23.30 mm (0.92 in) by calculation.

When the D is 41.90 mm (1.65 in), subtract the thickness of ST GAUGE from D, and then the value E would be 26.90 mm (1.06 in).

Calculation when clearance is 0.25 mm (0.0098 in)

T (mm) = 26.90 - 23.30 + 0.03 = 3.63

[T (in) = 1.059 - 0.917 + 0.0012 = 0.143]

Calculation formula when clearances are 0.55 mm (0.022 in)

T (mm) = 26.90 - 23.30 - 0.27 = 3.33

[T (in) = 1.059 - 0.917 - 0.012 = 0.131]

According to the calculation, the value "T" would be 3.33-3.63 mm (0.131-0.143 in), therefore select the thrust bearing with the thickness of 3.4 mm (0.134 in) or 3.6 mm (0.142 in) thrust bearing from the table.