Subaru Outback manuals

Subaru Outback: Front Differential Assembly

A: REMOVAL

1) Remove the transmission assembly from the vehicle. <Ref. to CVT-55, REMOVAL, Automatic Transmission Assembly.>

2) Remove the air breather hose. <Ref. to CVT-132, REMOVAL, Air Breather Hose.>

3) Remove the oil pan and control valve body. <Ref. to CVT-111, REMOVAL, Control Valve Body.>

4) Remove the transmission harness. <Ref. to CVT-121, REMOVAL, Transmission Harness.>

5) Remove the extension case. <Ref. to CVT-138, REMOVAL, Extension Case.>

6) Remove the rear drive shaft. <Ref. to CVT-141, REMOVAL, Rear Drive Shaft.>

7) Remove the transfer clutch assembly. <Ref. to CVT-146, REMOVAL, Transfer Clutch.>

8) Remove the transfer reduction driven gear assembly. <Ref. to CVT-158, REMOVAL, Transfer Reduction Driven Gear.>

9) Remove the intermediate case. <Ref. to CVT-165, REMOVAL, Intermediate Case.>

10) Remove the forward clutch assembly. <Ref. to CVT-180, REMOVAL, Forward Clutch Assembly.>

11) Remove the transmission case. <Ref. to CVT-211, REMOVAL, Transmission Case.>

12) Remove the primary pulley, secondary pulley and variator chain. <Ref. to CVT-226, REMOVAL, Primary Pulley and Secondary Pulley.>

13) Remove the drive pinion shaft assembly. <Ref. to CVT-242, REMOVAL, Drive Pinion Shaft Assembly.>

14) Remove the lock plates on both sides.

Subaru Outback. Continuously Variable Transmission

  1. Lock plate

15) Remove the differential side retainers using ST.

ST 18658AA020 WRENCH COMPL RETAINER

NOTE:

Subaru Outback. Continuously Variable Transmission

16) Remove the front differential assembly while being careful not to damage the attachment part of the retainer.

17) Remove the oil seals and O-rings from both differential side retainers. <Ref. to CVT-269, SIDE RETAINER, DISASSEMBLY, Front Differential Assembly.>

B: INSTALLATION

1) Install the front differential assembly to the converter case.

NOTE: Be careful not to damage the inside of the case (especially the mating surface of the differential side retainers).

2) Temporarily install the differential side retainers using ST.

ST 18658AA020 WRENCH COMPL RETAINER

Subaru Outback. Continuously Variable Transmission

3) Adjust the backlash of the front differential. <Ref. to CVT-277, ADJUSTMENT, Front Differential Assembly.>

4) Inspect and adjust the tooth contact. <Ref. to CVT-256, ADJUSTMENT, Drive Pinion Shaft Assembly.>

5) Remove the differential side retainers and install the O-rings and oil seals. <Ref. to CVT-276, SIDE RETAINER, ASSEMBLY, Front Differential Assembly.>

NOTE:

6) Install the differential side retainers using ST.

NOTE: When attaching, turn the differential side retainer by the same number of turns it took to remove, and align the marks.

ST 18658AA020 WRENCH COMPL RETAINER

7) Install the lock plate.

Tightening torque: 25 N*m (2.5 kgf-m, 18.4 ft-lb)

Subaru Outback. Continuously Variable Transmission

  1. Lock plate

8) Install the drive pinion shaft assembly. <Ref. to CVT-244, INSTALLATION, Drive Pinion Shaft Assembly.>

9) Install the primary pulley, secondary pulley and variator chain. <Ref. to CVT-230, INSTALLATION, Primary Pulley and Secondary Pulley.>

10) Install the transmission case. <Ref. to CVT-213, INSTALLATION, Transmission Case.>

11) Install the forward clutch assembly. <Ref. to CVT-181, INSTALLATION, Forward Clutch Assembly.>

12) Install the intermediate case. <Ref. to CVT-166, INSTALLATION, Intermediate Case.>

13) Install the transfer reduction driven gear assembly. <Ref. to CVT-158, INSTALLATION, Transfer Reduction Driven Gear.>

14) Install the transfer clutch assembly. <Ref. to CVT-147, INSTALLATION, Transfer Clutch.>

15) Install the rear drive shaft. <Ref. to CVT-141, INSTALLATION, Rear Drive Shaft.>

16) Install the extension case. <Ref. to CVT-138, INSTALLATION, Extension Case.>

17) Install the transmission harness. <Ref. to CVT-123, INSTALLATION, Transmission Harness.>

18) Install the control valve body and oil pan. <Ref. to CVT-115, INSTALLATION, Control Valve Body.>

19) Install the air breather hose. <Ref. to CVT-132, INSTALLATION, Air Breather Hose.>

20) Install the transmission assembly to the vehicle. <Ref. to CVT-70, INSTALLATION, Automatic Transmission Assembly.>

C: DISASSEMBLY

1. DIFFERENTIAL CASE ASSEMBLY

1) Remove the taper roller bearing using the ST.

ST 498077000 REMOVER

Subaru Outback. Continuously Variable Transmission

2) Remove the hypoid driven gear mounting bolt using the ST.

ST 18270KA020 SOCKET (E20)

Subaru Outback. Continuously Variable Transmission

3) Remove the differential case (LH).

Subaru Outback. Continuously Variable Transmission

4) Remove the differential bevel gear and washer from differential case.

Subaru Outback. Continuously Variable Transmission

5) Remove the straight pin.

Subaru Outback. Continuously Variable Transmission

6) Remove the pinion shaft, then remove the differential bevel gear, washer and differential bevel pinion.

Subaru Outback. Continuously Variable Transmission

  1. Pinion shaft
  2. Differential bevel gear
  3. Differential bevel pinion

2. SIDE RETAINER

NOTE: After adjusting the drive pinion backlash and tooth contact, replace the oil seal and O-ring with new parts.

1) Remove the O-ring.

Subaru Outback. Continuously Variable Transmission

2) Remove the oil seal.

Subaru Outback. Continuously Variable Transmission

3) Remove the split pin (ST), and then remove the claw.

ST 398527700 PULLER ASSY

Subaru Outback. Continuously Variable Transmission

  1. Claw
  2. Split pin
  3. Pin

4) Attach two claws to the outer race, and set the ST to side retainer.

ST 398527700 PULLER ASSY

Subaru Outback. Continuously Variable Transmission

  1. Shaft
  2. Claw

5) Restore the removed claws to original position, and install the pin and split pin.

6) Hold the shaft of ST to avoid removing from side retainer, and then remove the bearing outer race.

ST 398527700 PULLER ASSY

NOTE: Replace the bearing inner and outer races as a single unit.

Subaru Outback. Continuously Variable Transmission

  1. Shaft
  2. Side retainer

D: ASSEMBLY

1. DIFFERENTIAL CASE ASSY

1) Install the washer and differential bevel gear into differential case (LH).

Subaru Outback. Continuously Variable Transmission

2) Install the differential bevel gear pinions into differential case (LH) and install the pinion shaft.

Subaru Outback. Continuously Variable Transmission

  1. Pinion shaft
  2. Differential bevel gear
  3. Differential bevel pinion

3) Install the straight pin.

Subaru Outback. Continuously Variable Transmission

4) Install the differential case (RH) to hypoid driven gear and secure with vise.

Subaru Outback. Continuously Variable Transmission

5) Install the washer and differential bevel gear to the differential case (RH).

Subaru Outback. Continuously Variable Transmission

6) Using the ST, install the hypoid driven gear by tightening the installation bolt.

ST 18270KA020 SOCKET (E20)

Tightening torque: 20 N*m (2.0 kgf-m, 14.8 ft-lb)

Subaru Outback. Continuously Variable Transmission

7) While checking the tightening angle with the ST, further tighten the hypoid driven gear mounting bolts.

Tightening angle: 28º+-2º

ST 18554AA000 ANGLE GAUGE

8) Measurement of backlash (Selection of washer)

  1. Install the SUBARU genuine axle shaft to differential case.

Part No. 38415AA070 Axle shaft

  1. Measure the gear backlash using ST1 and ST2, and then insert the ST2 through the window of differential case.

ST1 498247001 MAGNET BASE
ST2 498247100 DIAL GAUGE

NOTE:

Specification: 0.13 - 0.18 mm (0.0051 - 0.0071 in)

Subaru Outback. Continuously Variable Transmission

  1. If the backlash is not within specification, select a washer from the table below and replace.

Subaru Outback. Continuously Variable Transmission

9) Using the ST, install the left and right taper roller bearings.

ST1 499277100 BUSHING 1-2 INSTALLER
ST2 398497701 SEAT

Subaru Outback. Continuously Variable Transmission

2. SIDE RETAINER

NOTE: After adjusting the backlash and tooth contact, replace the oil seal and O-ring of side retainer with new parts.

1) Press-fit the bearing outer race to side retainer.

2) Using the ST, install the oil seal.

NOTE:

ST 18675AA000 DIFFERENTIAL SIDE OIL SEAL INSTALLER

Subaru Outback. Continuously Variable Transmission

3) Install the O-ring.

NOTE:

Subaru Outback. Continuously Variable Transmission

E: INSPECTION

Specification: 0.13 - 0.18 mm (0.0051 - 0.0071 in)

Subaru Outback. Continuously Variable Transmission

F: ADJUSTMENT

1) Using the ST, screw-in the retainer until resistance is felt.

NOTE: RH side should be screwed-in more than LH side.

ST 18658AA020 WRENCH COMPL RETAINER

Subaru Outback. Continuously Variable Transmission

2) Remove the remaining liquid gasket from the mating surface completely.

3) Using the ST, install the drive pinion assembly to converter case.

ST1 18270KA020 SOCKET (E20)

NOTE: Do not confuse the three different-length bolts when installing.

Tightening torque: 43 N*m (4.4 kgf-m, 31.7 ft-lb)

Subaru Outback. Continuously Variable Transmission

4) Rotate the drive pinion shaft more than ten times using ST1 and ST2.

ST1 18667AA010 HOLDER
ST2 499787700 WRENCH

Subaru Outback. Continuously Variable Transmission

5) While rotating the pinion shaft, keep tightening the retainer LH, and loosening the retainer RH until the pinion shaft no longer be turned. When pinion shaft no longer turns, backlash is "zero".

6) After the "zero" state is established, loosen the retainer LH by 3 notches and secure it with the lock plate.

Loosen the retainer RH and retighten until it stops. Rotate the drive pinion 2 or 3 times. Tighten the retainer RH further 1-3/4 notches. This sets the preload. Finally, secure the retainer with its lock plate.

Subaru Outback. Continuously Variable Transmission

  1. Lock plate

NOTE: Turning the retainer by every one tooth changes the backlash approx. 0.05 mm (0.0020 in).

Subaru Outback. Continuously Variable Transmission

  1. 1 tooth

7) Insert the two SUBARU genuine axle shafts into differential case.

Part No. 38415AA070 Axle shaft

8) Wrap the drive shaft pinion shaft with cloth and pinch with vise pliers. Install the installation bolt into the bolt hole of secondary pulley and secure the bolt and vise pliers using a band or wire.

Make sure the drive pinion shaft does not move.

Subaru Outback. Continuously Variable Transmission

9) Check the backlash is within specification using ST1, ST2 and ST3.

ST1 498255400 PLATE
ST2 498247001 MAGNET BASE
ST3 498247100 DIAL GAUGE

Backlash: 0.13 - 0.18 mm (0.005 - 0.007 in)

Subaru Outback. Continuously Variable Transmission

10) Adjust the teeth contact of the front differential and drive shaft. <Ref. to CVT-256, ADJUSTMENT, Drive Pinion Shaft Assembly.>

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 Front Reduction Drive Gear

A: REMOVAL 1) Remove the transmission assembly from the vehicle. <Ref. to CVT-55, REMOVAL, Automatic Transmission Assembly.> 2) Remove the air breather hose. <Ref. to CVT-132, REMOVAL, Air

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 Front Bumper

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