Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU1998LEGACY BRIGHTON WAGON AWD F4-2.2L SOHCREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINMANUAL TRANSMISSION/TRANSAXLESERVICE AND REPAIRSERVICE PROCEDURESCENTER DIFFERENTIAL
1998 Subaru Legacy Brighton Wagon AWD F4-2.2L SOHC
Center Differential
1998 Subaru Legacy Brighton Wagon AWD F4-2.2L SOHCSECTION Center Differential
A: DISASSEMBLY
1. Remove snap ring (1) (Inner-110) using flat bladed screwdriver.
2. Remove center differential cover (2).
3. Remove snap ring (4) and roller bearing (3).
4. Remove viscous coupling (5),
5. Remove needle bearings (6).
6. Remove adjusting washer (7) (45 x 62 x t).
7. Remove pinion shaft (8), bevel pinions (9) and retainers (10).
8. Remove side gear (11).
9. Remove thrust washer (12).
10. Remove ball bearing (13) using Special Service Tool(SST).
(SST) 498077300 CENTER DIFFERENTIAL BEARING REMOVER
CAUTION:
Do not reuse ball bearing.
B: ASSEMBLY
Assembly is in the reverse order of disassembly. Do the following:
- Install thrust washer with chamfered side of inner perimeter facing the side gear.
- Install adjusting washer with chamfered side of inner perimeter facing the viscous coupling using SST.
SST 499547300 INSTALLER SET
1. Selection of snap ring (Inner-110)
1. After assembling, using a thickness gauge measure clearance between snap ring (1) and center differential case.
Clearance: 0 - 0.15 mm (0 - 0.0059 inch)
2. If the measurement is not within the specification, select suitable snap ring.
2. Selection of adjusting washer (Backlash adjustment)
1. After assembling, set up a SST1 and SST2 to end of viscous coupling shaft. Move viscous coupling up and down, and measure backlash in the axial direction.
SST1 498247001 MAGNET BASE
SST2 498247100 DIAL GAUGE
Backlash: 0.62 - 0.86 mm (0.0244 - 0.0339 inch)
2. If the measurement is not within the specification, select suitable washer.
1. Remove snap ring (1) (Inner-110) using flat bladed screwdriver.
2. Remove center differential cover (2).
3. Remove snap ring (4) and roller bearing (3).
4. Remove viscous coupling (5),
5. Remove needle bearings (6).
6. Remove adjusting washer (7) (45 x 62 x t).
7. Remove pinion shaft (8), bevel pinions (9) and retainers (10).
8. Remove side gear (11).
9. Remove thrust washer (12).
10. Remove ball bearing (13) using Special Service Tool(SST).
(SST) 498077300 CENTER DIFFERENTIAL BEARING REMOVER
CAUTION:
Do not reuse ball bearing.
B: ASSEMBLY
Assembly is in the reverse order of disassembly. Do the following:
- Install thrust washer with chamfered side of inner perimeter facing the side gear.
- Install adjusting washer with chamfered side of inner perimeter facing the viscous coupling using SST.
SST 499547300 INSTALLER SET
1. Selection of snap ring (Inner-110)
1. After assembling, using a thickness gauge measure clearance between snap ring (1) and center differential case.
Clearance: 0 - 0.15 mm (0 - 0.0059 inch)
2. If the measurement is not within the specification, select suitable snap ring.
2. Selection of adjusting washer (Backlash adjustment)
1. After assembling, set up a SST1 and SST2 to end of viscous coupling shaft. Move viscous coupling up and down, and measure backlash in the axial direction.
SST1 498247001 MAGNET BASE
SST2 498247100 DIAL GAUGE
Backlash: 0.62 - 0.86 mm (0.0244 - 0.0339 inch)
2. If the measurement is not within the specification, select suitable washer.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.