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Home › Subaru › 2008 › Tribeca Base › Repair and Diagnosis › Transmission › Automatic Trans › Automatic Transmission (5AT) › AT Main Case › Adjustment

AT Main Case: Adjustment

  1. Using the ST, measure the height "A" from the 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
    G05671178Courtesy 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
    G05671179Courtesy of SUBARU OF AMERICA, INC.
  3. Calculate the measured value from 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 the 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
    G05671180Courtesy of SUBARU OF AMERICA, INC.
  5. Set the value as "E" which subtract the thickness of ST (GAUGE) from the measured value on step  4).

    Calculation: E (mm) = D - 15

    [E (in) = D - 0.59]

  6. Calculation formula:

    Select one 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 needle bearing thickness

    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

    NOTE: Calculation formula for "T" above is applied when measuring with the ST (499575400 GAUGE). In the calculation without using ST, substitute the thickness of collar used to calculate the value "E" on step  5).
    THRUST BEARING THICKNESS SPECIFICATION

    Thrust bearing
    Part No. Thickness mm (in)
    806548020 3.2 (0.126)
    606548030 3.4 (0.134)
    806548040 3.6 (0.142)
    806548050 3.8 (0.150)
    806548060 4.0 (0.157)
    806548070 4.2 (0.165)
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