Differentials: Diagnosis Subaru Forester SG 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 abnormal tooth contact is evident, find out the cause and adjust to give correct tooth contact. Replace the gear if excessively worn or incapable of adjustment. If crack, score or seizure is evident, replace as a set. Slight damage of tooth can be corrected by oil stone or the like.
2. Side gear and pinion mate gear Replace if crack, score or other defects are evident on tooth surface. Replace if thrust washer contacting surface is worn or seized. Slight damage of the surface can be corrected by oil stone or the like.
3. Bearings Replace if seizure, peeling, wear, rust, dragging during rotation, noise or other defect is evident.
4. Thrust washers of side gear and pinion mate gear: Replace if seizure, flaw, abnormal wear or other defect is evident.
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 contacting surfaces have flaws.

Make sure that there is no oil leakage from side oil seal.

If there is any oil leakage, replace the oil seal.

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1. Disconnect the ground cable from battery.
2. Move the select lever or gear shift lever to "N".
3. Release the parking brake.
4. Loosen both wheel nuts.
5. Jack-up the vehicle and support it with rigid racks.
6. Remove the wheels.
7. Remove the rear exhaust pipe and muffler. Non-turbo model < Ref. to «REMOVAL»(ref-274158-S05380561552007121400000) , Rear Exhaust Pipe. > and < Ref. to «REMOVAL»(ref-274158-S42180220342007121400000) , Muffler. > Turbo model < Ref. to «REMOVAL»(ref-274159-S35889321872007121400000) , Rear Exhaust Pipe. > and < Ref. to «REMOVAL»(ref-274159-S11511559372007121400000) , Muffler. >
8. Remove the DOJ of rear drive shaft from rear differential. Remove the ABS wheel speed sensor cable clamp and parking brake cable clamp from bracket. ABS wheel speed sensor cable clamp Parking brake cable clamp Remove the ABS wheel speed sensor cable clamp from trailing link. Remove the ABS wheel speed sensor cable clamp and parking brake cable guide from trailing link. Remove the rear stabilizer link. Remove the bolts which secure trailing link to housing. Remove the bolts which secure front and rear lateral link to rear housing. Remove the DOJ from the rear differential by using ST. NOTE: When removing the DOJ from rear differential, fit ST to the bolts as shown in the figure so as not to damage the side bearing retainer. ST 28099PA100 DRIVE SHAFT REMOVER
9. Remove the rear drive shaft to the rear cross-member using wire.
10. Using the ST, remove the oil seal. ST 398527700 PULLER ASSY
11. Drive in a new side oil seal using ST. NOTE: Apply chassis grease between the oil seal lips. ST 398437700 DRIFT
12. Insert the DOJ into rear differential. Install the ST to rear differential. ST 28099PA090 SIDE OIL SEAL PROTECTOR Install the spline shaft until the spline portion is inside the side oil seal using ST. ST 28099PA090 SIDE OIL SEAL PROTECTOR Remove the ST. ST 28099PA090 SIDE OIL SEAL PROTECTOR
13. Hereafter, reassemble in the reverse order of disassembly.

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

GENERAL DIAGNOSTIC