Differentials: Diagnosis Subaru Legacy BL/BP рестайлинг

INSPECTION

Wash all the disassembled parts clean, and examine them for wear, damage and other defects. Repair or replace the defective parts as necessary.

1. Hypoid driven gear and drive pinion If there is evidently an abnormal tooth contact, find out the cause and adjust until the teeth contact correctly. Replace the gear if there is an excessive worn or an incapable adjustment. If crack, cutout or seizure is found, replace the parts as a set. Slight damage of some teeth can be corrected by oil stone or the like.
2. Side gear and pinion mate gear Replace if cracks, scoring or other defects are evident on the tooth surface. Replace if thrust washer contact surface is worn or seized. Slight damages of the surface can be corrected by oil stones or equivalent.
3. Bearing Replace if seizure, peeling, wear, rust, dragging during rotation, noise or other defect is evident.
4. Thrust washer of the side gear and pinion mate gear: Replace if seized, flawed, abnormally worn or having other defects.
5. Oil seal Replace if deformed or damaged, and at every disassembling.
6. Differential carrier Replace if the bearing bores are worn or damaged.
7. Differential case Replace if its sliding surfaces are worn or cracked.
8. Companion flange Replace if the oil seal lip contact surface shows cracking.

Wash all the disassembled parts clean, and examine them for wear, damage or other defects. Repair or replace the defective parts as necessary.

1. Hypoid driven gear and drive pinion If there is evidently an abnormal tooth contact, find out the cause and adjust until the teeth contact correctly. Replace the gear if there is an excessive worn or an incapable adjustment. If crack, cutout or seizure is found, replace the parts as a set. Slight damage of some teeth can be corrected by oil stone or the like.
2. Side gear and pinion mate gear Replace if cracks, scoring or other defects are evident on the tooth surface. Replace if thrust washer contact surface is worn or seized. Slight damages of the surface can be corrected by oil stones or equivalent.
3. Bearing Replace if seizure, peeling, wear, rust, dragging during rotation, noise or other defect is evident.
4. Thrust washer of the side gear and pinion mate gear: Replace if seized, flawed, abnormally worn or having other defects.
5. Oil seal Replace if deformed or damaged, and at every disassembling.
6. Differential carrier Replace if the bearing bores are worn or damaged.
7. Differential case Replace if its sliding surfaces are worn or cracked.
8. Companion flange Replace if the oil seal lip contact surface shows cracking.

Make sure that there is no leakage from front oil seal portion. If there is any leakage replace the oil seal and inspect the propeller shaft.

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1. Shift the select lever or gear shift lever to neutral.
2. Release the parking brake.
3. Remove the oil drain plug, and drain gear oil. Except for VA2-type VA2-type
4. Install the oil drain plug. NOTE: Apply liquid gasket to the drain plug for the T-type (except for GT spec. B 6MT model). Liquid gasket: THREE BOND 1105 (Part No. 004403010) or equivalent Use a new copper gasket for the VA1 -type and T-type (GT spec. B 6MT model). Use a new metal gasket for the VA2-type. Tightening torque: T-type (except for GT spec. B 6MT model): 49 N.m (5.0 kgf-m, 36.2 ft-lb) T-type (GT spec. B 6MT model): 60 N.m (6.1 kgf-m, 44.3 ft-lb) VA1-type: 34 N.m (3.5 kgf-m, 25.1 ft-lb) VA2-type: 29 N.m (3.0 kgf-m, 21.4 ft-lb)
5. Jack-up the rear wheel and support the body with rigid racks.
6. Remove the rear exhaust pipe and muffler.
7. Remove the heat shield cover. (When equipped)
8. Remove the propeller shaft. REMOVAL , Propeller Shaft .>
9. Remove the self-locking nut while holding the companion flange with ST. ST 498427200 FLANGE WRENCH
10. Extract the companion flange using ST. ST 399703600 PULLER ASSY
11. Remove the oil seal using ST or screwdriver. ST 398527700 PULLER ASSY
12. Install a new oil seal with ST. ST 498447120 OIL SEAL INSTALLER
13. Install the companion flange. NOTE: Use a plastic hammer to install companion flange.
14. Apply seal material on the drive pinion shaft thread and new self-locking nut seat. SEAL MATERIAL THREE BOND 1324 (Part No. 004403042) or equivalent
15. Tighten the self-locking nut within the specified torque range so that the rotating resistance of companion flange becomes the same as that of before oil seal replacement. ST 498427200 FLANGE WRENCH NOTE: Use a new self-locking nut. Tightening torque: T-type: 181.5 N.m (18.5 kgf-m, 134.0 ft-lb) VA-type: 191 N.m (19.5 kgf-m, 141.0 ft-lb)
16. Hereafter, reassemble in the reverse order of disassembly.

Make sure that there is no leakage from side oil seal. If there is any leakage, replace the oil seal.

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1. Remove the rear differential. REMOVAL, Rear Differential (T-type) .> REMOVAL, Rear Differential (VA-type) .>
2. Remove the rear differential side oil seal using a screwdriver wrapped with vinyl tape to prevent the side retainer from scratches.
3. Using the ST, install the oil seal to the side retainer. T-type and VA2-type ST 398437700 DRIFT VA1-type ST 498447100 INSTALLER
4. Install the rear differential. INSTALLATION, Rear Differential (T-type) .> INSTALLATION, Rear Differential (VA-type) .>

Scheme 19

1. Disconnect the ground cable from the battery.
2. Lift the vehicle.
3. Support the rear differential using transmission jack, and then remove the rear differential front member.

1. Check the rear differential front member for damage, bend and corrosion. If damage, bend or corrosion is excessive, replace the rear differential front member.
2. Check the bushings of rear differential member for cracking, hardening and damage. If cracking, hardening or damage is excessive, replace rear differential front member.

DIAGNOSTIC TROUBLE SYMPTOM CHART