Steering System (Power Steering): Inspection: Gearbox

Set the steering wheel in the straight position, then rotate it 90° in both the left and right directions. While steering wheel is being rotated, check the looseness of the gearbox.
Tightening torque:

60 N.m (6.1 kgf-m, 44.3 ft-lb)

Fig 1: Locating Gearbox Mounting Bolts (1 Of 2)
Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Locating Gearbox Mounting Bolts (2 Of 2)
Courtesy of SUBARU OF AMERICA, INC.
Check the boot for damage, cracks or deterioration.
With the vehicle stopped on a level surface, quickly turn the steering wheel to the left and right. While steering wheel is being rotated, check the gear backlash. If any noise is noticed, adjust the gear backlash in the following manner.
1. Apply liquid gasket to at least 1/3 of entire perimeter of adjusting screw thread.
  Liquid gasket:
  
  THREE BOND 1102 or equivalent
  
  Fig 3: Adjusting Screw Liquid Gasket Applying Area
  Courtesy of SUBARU OF AMERICA, INC.
2. Tighten the adjusting screw to 9.8 N.m (0.99 kgf-m, 7.2 ft-lb) and then loosen.
3. Tighten the adjusting screw to 4.9 N.m (0.49 kgf-m, 3.6 ft-lb) and then loosen.
4. Tighten the adjusting screw to 4.9 N.m (0.49 kgf-m, 3.6 ft-lb) and then loosen approx. 30°.
5. Install the lock nut. While holding the adjusting screw with a wrench, tighten the lock nut using ST.
ST 926230000 SPANNER

Tightening torque (lock nut):

40 N.m (4.1 kgf-m, 29.5 ft-lb)

Hold the adjusting screw with a wrench to prevent it from turning while tightening the lock nut.