Rear Drive Shaft: Adjustment

NOTE: When replacing the rear drive shaft or bearing, select the thrust needle bearing.

Using the ST, measure the distance "A" from ST end face to rear drive shaft thrust needle bearing catch surface.
ST 398643600 GAUGE

Fig 1: Identifying Distance Between ST End Face And Rear Drive Shaft Thrust Needle Bearing Catch Surface
Courtesy of SUBARU OF AMERICA, INC.
Using the ST, measure the height "B" from the intermediate case mating surface to the ST end face.
NOTE: Place the measurement tool at the dent on ST upper side to measure.

ST 499737100 PULLER SET

Fig 2: Identifying Length Between Intermediate Case Mating Surface And ST End Face
Courtesy of SUBARU OF AMERICA, INC.
Using the ST, measure the height "C" from ST end face to transfer clutch assembly thrust needle bearing catch surface.
NOTE: Place the measurement tool at the dent on ST upper side to measure.

ST 499737100 PULLER SET

Fig 3: Identifying Height Between ST End Face And Transfer Clutch Assembly Thrust Needle Bearing Catch Surface
Courtesy of SUBARU OF AMERICA, INC.

Obtain the thickness of thrust bearing using the following formula to select the thrust bearing.

T mm = (A - 15) - (B - C) - (0.05 - 0.25)

[T in = (A - 0.59) - (B - C) - (0.002 - 0.01)]

T: Thrust bearing thickness

A: Height from the ST end face to the rear drive shaft thrust needle bearing catch surface

B: Height from the mating surface of the intermediate case to the ST end face

C: Height from the ST end face to the transfer clutch assembly thrust needle bearing catch surface 15 mm (0.591 in): Thickness of ST

0.05 - 0.25 mm (0.002 - 0.01 in): Clearance