HYPOID Gear Backlash

Set the ST1, ST2 and ST3. Insert the needle through transmission oil drain plug hole so that the needle comes in contact with the tooth surface on the right corner, and check the backlash.
ST1 498247001 MAGNET BASE

ST2 498247100 DIAL GAUGE

ST3 498255400 PLATE
Secure the drive pinion shaft using the ST, install SUBARU genuine axle shafts to both sides, rotate in the both directions so that the gauge contacts the tooth surface, and read the dial gauge.
NOTE: If the backlash is outside the specified range, adjust it by turning the side retainer in the right side case.

Backlash

0.13 - 0.18 mm (0.0051 - 0.0071 in)

ST 18667AA020 HOLDER

Part No. 38415AA100 Axle shaft

Fig 1: Inserting Needle Through Transmission Oil Drain Plug Hole
Courtesy of SUBARU OF AMERICA, INC.