Differentials: Other Subaru Impreza GD/GC/GG

Rear Differential Gear Oil

Recommended oil

Recommended Rear Differential Gear Oil. Scheme 157

VA-Type, Differential Adjusting Parts Chart. Scheme 158

T-Type, Differential Adjusting Parts Chart (1 Of 2). Scheme 159

T-Type, Differential Adjusting Parts Chart (2 Of 2). Scheme 160

Identifying Rear Differential For T-Type Without LSD Components. Scheme 161

Tightening torque: N.m (kgf-m, ft-lb)

1. T1: 10.3 (1.05, 7.6)
2. T2: 29 (3.0, 21.7)
3. T3: 49.0 (5.0, 36.2)
4. T4: 103 (10.5, 76)
5. T5: 181 (18.5, 134)

Identifying Rear Differential For T-Type With LSD Components. Scheme 162

Tightening torque: N.m (kgf-m, ft-lb)

1. T1: 10.3 (1.05, 7.6)
2. T2: 29(3.0, 21.7)
3. T3: 49.0 (5.0, 36.2)
4. T4: 103 (10.5, 76)
5. T5: 181 (18.5, 134)

Identifying Rear Differential For VA-Type Components. Scheme 163

Tightening torque: N.m (kgf-m, ft-lb)

1. T1: 25 (2.5, 18.1)
2. T2: 34 (3.5, 25.3)
3. T3: 62 (6.3, 45.6)
4. T4: 188 (19.2, 139)

Identifying Rear Differential Mounting System Components. Scheme 164

Tightening torque: N.m (kgf-m, ft-lb)

1. T1: 20 (2.0, 14.5)
2. T2: 32 (3.3, 23.9)
3. T3: 64 (6.5, 47.0)
4. T4: 69 (7.0, 50.6)
5. T5: 88 (9.0, 65.0)
6. T6: 98 (10.0, 72.0)

CAUTION

1. Wear working clothing, including a cap, protective goggles, and protective shoes during operation.
2. Remove contamination including dirt and corrosion before removal, installation or disassembly.
3. Keep the disassembled parts in order and protect them from dust or dirt.
4. Before removal, installation or disassembly, be sure to clarify the failure. Avoid unnecessary removal, installation, disassembly, and replacement.
5. Be careful not to burn your hands, because each part on the vehicle is hot after running.
6. Use SUBARU genuine gear oil, grease etc. or the equivalent. Do not mix gear oil, grease etc. with that of another grade or from other manufacturers.
7. Be sure to tighten fasteners including bolts and nuts to the specified torque.
8. Place shop jacks or safety stands at the specified points.
9. Apply gear oil onto sliding or revolution surfaces before installation.
10. Before installing O-rings or snap rings, apply sufficient amount of gear oil to avoid damage and deformation.
11. Before securing a part on a vice, place cushioning material such as wood blocks, aluminum plate, or shop cloth between the part and the vice.
12. Avoid damaging the mating face of the case.

Identifying Special Tools (1 Of 9). Scheme 165

Identifying Special Tools (2 Of 9). Scheme 166

Identifying Special Tools (3 Of 9). Scheme 167

Identifying Special Tools (4 Of 9). Scheme 168

Identifying Special Tools (5 Of 9). Scheme 169

Identifying Special Tools (6 Of 9). Scheme 170

Identifying Special Tools (7 Of 9). Scheme 171

Identifying Special Tools (8 Of 9). Scheme 172

Identifying Special Tools (9 Of 9). Scheme 173

Identifying General Tools. Scheme 174

Scheme 175

Scheme 176

1. Disconnect ground terminal from battery.
2. Jack-up vehicle and support it with sturdy racks.
3. Remove the oil drain plug and filler plug, and drain the gear oil. CAUTION: Be careful not to burn your hands, because gear oil becomes extremely hot after running. (Scheme 175): Identifying Rear Differential Drain & Fill Plugs
4. Tighten oil drain plug. CAUTION: Apply fluid packing to oil drain plug. Fluid packing: THREE BOND 1105 or equivalent Tightening torque: 49.0 N.m (5.0 kgf-m, 36.2 ft-lb)
5. Fill differential carrier with gear oil to the upper plug level. CAUTION: Carefully refill oil while watching the level. Excess or insufficient oil must be avoided. Oil capacity: 0.8 l (0.8 US qt, 0.7 Imp qt) (Scheme 176): Identifying Rear Differential Drain & Fill Plugs
6. Install filler plug. CAUTION: Apply fluid packing to oil drain plug. Fluid packing: THREE BOND 1105 or equivalent Tightening torque: T-type; 49.0 N.m (5.0 kgf-m, 36.2 ft-lb) VA-type; 33 N.m (3.4 kgf-m, 24.6 ft-lb)

NOTE

Refer to "AT" section or "MT" section in separate publication for Front Differential.

Scheme 177

Scheme 178

Scheme 179

Scheme 180

Scheme 181

Scheme 182

Scheme 183

Scheme 184

Scheme 185

Scheme 186

Scheme 187

Scheme 188

1. Disconnect ground terminal from battery.
2. Move selector lever or gear shift lever to "N".
3. Release the parking brake.
4. Loosen wheel nuts.
5. Jack-up vehicle and support it with sturdy racks.
6. Remove wheels.
7. Remove rear exhaust pipe and muffler. See «REMOVAL»(ref-177869-S08268736982005060700000), Rear Exhaust Pipe and «REMOVAL»(ref-177869-S37852780942005060700000), Muffler.
8. Remove front exhaust cover. (Scheme 177): Removing Front Exhaust Cover
9. Remove front cover of rear differential mount. (Scheme 178): Removing Front Cover Of Rear Differential Mount
10. Remove propeller shaft. CAUTION: When removing propeller shaft, pay attention not to damage the sliding surfaces of rear drive shaft (extension) spline, oil seal and sleeve yoke. NOTE: Prepare an oil can and cap since the transmission oil flows out from the extension at removing propeller shaft. Insert the cap into the extension to prevent transmission oil from flowing out immediately after removing the propeller shaft. If extension cap is not available, cover the opening with a vinyl bag in order to prevent transmission gear oil or ATF leakage. (Scheme 179): Removing Propeller Shaft
11. Remove heat sealed cover.
12. Remove clamps and bracket of parking brake cable. (Scheme 180): Identifying Heat Sealed Cover & Bracket Of Parking Brake Cable
13. Remove DOJ of rear drive shaft from rear differential using ST. See «REPLACEMENT»(ref-177243-S24786067012005052500000), Rear Differential Side Oil Seal. ST 28099PA100 DRIVE SHAFT REMOVER (Scheme 181): Removing DOJ Of Rear Drive Shaft From Rear Differential
14. Secure rear drive shaft to rear crossmember using wire. (Scheme 182): Securing Rear Drive Shaft To Rear Crossmember Using Wire
15. Remove lower differential bracket. (Scheme 183): Removing Lower Differential Bracket
16. Support rear differential with transmission jack. (Scheme 184): Supporting Rear Differential With Transmission Jack
17. Remove self-locking nuts connecting rear differential to rear crossmember. (Scheme 185): Removing Self-Locking Nuts Connecting Rear Differential To Rear Crossmember
18. Remove bolts which secure rear differential front member to body. Loosen bolt A first, then remove bolts B. NOTE: Support front member with the use of a helper to prevent it from dropping. (Scheme 186): Identifying Bolts A & B At Rear Differential Front Member
19. Remove bolt A.
20. While slowly lowering transmission jack, move rear differential forward and remove front member and rear differential from body. (Scheme 187): Removing Front Member & Rear Differential From Body
21. Remove rear differential from front member. (Scheme 188): Removing Rear Differential From Front Member

T-TYPE

1. Disconnect ground terminal from battery.
2. Move selector lever or gear shift lever to "N".
3. Release the parking brake.
4. Loosen wheel nuts.
5. Jack-up vehicle and support it with sturdy racks.
6. Remove wheels.
7. Remove rear exhaust pipe and muffler. See «REMOVAL»(ref-177869-S08268736982005060700000) , Rear Exhaust Pipe and «REMOVAL»(ref-177869-S37852780942005060700000) , Muffler.
8. Remove rear differential front member. NOTE: When removing rear differential front member, work the removal procedure as rear differential. See «REMOVAL»(ref-177243-S36835294512005052500000) , Rear Differential for T-type.

VA-TYPE

1. Disconnect ground terminal from battery.
2. Move selector lever or gear shift lever to "N".
3. Release the parking brake.
4. Loosen wheel nuts.
5. Jack-up vehicle and support it with sturdy racks.
6. Remove wheels.
7. Remove rear exhaust pipe and muffler. See «REMOVAL»(ref-177869-S08268736982005060700000) , Rear Exhaust Pipe and «REMOVAL»(ref-177869-S37852780942005060700000) , Muffler.
8. Remove rear differential front member. NOTE: When removing rear differential front member, work the removal procedure as rear differential. See «REMOVAL»(ref-177243-S14143845532005052500000) , Rear Differential for VA-type.

To install, reverse the removal sequence.

Scheme 189

Scheme 190

1. Position front member on body by passing it under parking brake cable and securing to rear differential. NOTE: When installing rear differential front member, do not confuse the installation sequence of the stopper. see scheme 197: Installing Rear Differential (T-Type)
2. Insert DOJ of rear drive shaft into rear differential. See «REPLACEMENT»(ref-177243-S24786067012005052500000), Rear Differential Side Oil Seal. CAUTION: Before inserting, replace the differential side oil seal with a new one. ST 28099PA090 SIDE OIL SEAL PROTECTOR see scheme 198: Inserting Rear Drive Shaft Into Rear Differential
3. Installing procedure hereafter is in the reverse order of removal.

To install, reverse the removal sequence.

Scheme 191

Scheme 192

1. Position front member on body by passing it under parking brake cable and securing to rear differential. NOTE: When installing rear differential front member, do not confuse the installation sequence of the stopper. see scheme 199: Installing Rear Differential (VA-Type)
2. Insert DOJ of rear drive shaft into rear differential. See «REPLACEMENT»(ref-177243-S24786067012005052500000), Rear Differential Side Oil Seal. CAUTION: Before inserting, replace the differential side oil seal with a new one. ST 28099PA090 SIDE OIL SEAL PROTECTOR see scheme 200: Inserting DOJ Of Rear Drive Shaft Into Rear Differential
3. Installing procedure hereafter is in the reverse order of removal.

General Inspection Trouble Shooting Chart. Scheme 193