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Contents Section: Differential System (except Sti) All sections

MT MODEL Subaru Impreza WRX STI GR

Differential System (except Sti) 19 illustrations ~540 words

MT MODEL

For front differential of the manual transmission. Ref. to FRONT DIFFERENTIAL ASSEMBLY .

Scheme 106

Scheme 106: REMOVAL
Scheme 106: REMOVAL

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  1. Set the vehicle on a lift.
  2. Disconnect the ground cable from battery.
  3. Shift the select lever or gear shift lever to neutral.
  4. Release the parking brake.
  5. Loosen the wheel nuts.
  6. Lift up the vehicle.
  7. Remove the wheels.
  8. Drain the differential gear oil. Ref. to «REPLACEMENT»(/subaru/impreza-wrx-sti/gr-2007-2011/remont/differentials-drive-axles/#differential-system-except-sti) .
  9. Remove the rear exhaust pipe and muffler. Non-turbo model Ref. to «REMOVAL»(/subaru/impreza-wrx-sti/gr-2007-2011/remont/exhaust/#exhaust-system-h4so-except-sti) , Rear Exhaust Pipe. Ref. to «REMOVAL»(/subaru/impreza-wrx-sti/gr-2007-2011/remont/exhaust/#exhaust-system-h4so-except-sti) , Muffler. Turbo model Ref. to «REMOVAL»(/subaru/impreza-wrx-sti/gr-2007-2011/remont/exhaust/#exhaust-system-exhaust-h4dotc-except-sti) , Rear Exhaust Pipe. Ref. to «REMOVAL»(/subaru/impreza-wrx-sti/gr-2007-2011/remont/exhaust/#exhaust-system-exhaust-h4dotc-except-sti) , Muffler.
  10. Remove the heat shield cover.
  11. Remove the propeller shaft. Ref. to «REMOVAL»(/subaru/impreza-wrx-sti/gr-2007-2011/remont/axle-shafts/#drivetrain-system-except-sti__removal) , Propeller Shaft.
  12. Remove the DOJ of rear drive shaft from rear differential. Remove the ABS wheel speed sensor cable from the clamp. Remove the bolts which secure the rear stabilizer link to the rear lateral link. Remove the bolts which secure the shock absorber to the rear lateral link. Remove the bolts which secure the rear lateral link to the housing. Remove the bolts which secure the trailing link to the housing. Remove the DOJ from the rear differential by using ST. NOTE: When removing the DOJ from the rear differential, fit the ST to the bolts as shown in the figure so as not to damage the side retainer. ST 28099PA100 DRIVE SHAFT REMOVER
  13. Suspend the rear drive shaft to the rear crossmember using wire.
  14. Remove the rear differential front member.
  15. Support the rear differential with the transmission jack.
  16. Remove the self-lock nuts which hold the rear differential to the rear crossmember.
  17. Remove the dynamic damper assembly. (5 door AT model)
  18. While slowly lowering the transmission jack, move the rear differential forward, and remove the rear differential from the vehicle.
  19. Remove the rear differential member plate from the rear differential.

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Scheme 120: INSTALLATION
Scheme 120: INSTALLATION

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  1. Attach the rear differential member plate to the rear differential.
  2. Set the rear differential to transmission jack.
  3. Adjust the transmission jack and properly insert the rear differential stud bolt into rear crossmember bushing.
  4. After inserting the rear differential stud bolt into the rear crossmember bushing, lift up the transmission jack and align the rear differential to its attachment position.
  5. Install the dynamic damper assembly. (5 door AT model)
  6. Tighten a new self-locking nut temporarily to rear crossmember.
  7. Install the rear differential front member with a new self-locking nut. Tightening torque: T1:50 N.m (5.1 kgf-m, 36.9 ft-lb) T2:110 N.m (11.2 kgf-m, 81.1 ft-lb)
  8. Tighten the self-locking nut. Tightening torque: 70 N.m (7.1 kgf-m, 51.6 ft-lb)
  9. Attach the ST to rear differential. ST 28099PA090 OIL SEAL PROTECTOR
  10. Insert the spline shaft until the spline portion comes inside the side oil seal.
  11. Remove ST from rear differential.
  12. Push the housing to fully insert the DOJ into the rear differential.
  13. Lower the transmission jack.
  14. Installing procedure hereafter is in the reverse order of removal.
  15. After installing, fill the differential carrier with gear oil up to the bottom of the filler plug hole. Ref. to «REPLACEMENT»(/subaru/impreza-wrx-sti/gr-2007-2011/remont/differentials-drive-axles/#differential-system-except-sti) .
  16. Inspect the wheel alignment and adjust if necessary.