Drivetrain System -- Except Sti: Other Subaru Impreza GH

PROPELLER SHAFT

PROPELLER SHAFT DIAMETER SPECIFICATION

Scheme 144

CAUTION

1. Wear appropriate work clothing, including a cap, protective goggles and protective shoes when performing any work.
2. Remove contamination including dirt and corrosion before removal, installation or disassembly.
3. Keep the disassembled parts in order and protect them from dust and dirt.
4. Before removal, installation or disassembly, be sure to clarify the failure. Avoid unnecessary removal, installation, disassembly and replacement.
5. Vehicle components are extremely hot after driving. Be wary of receiving burns from heated parts.
6. Use SUBARU genuine grease etc. or equivalent. Do not mix grease etc. of different grades or manufacturers.
7. Be sure to tighten fasteners including bolts and nuts to the specified torque.
8. Place shop jacks or rigid racks at the specified points.
9. Apply grease onto sliding or revolving surfaces before installation.
10. Before installing snap rings, apply sufficient amount of grease to avoid damage and deformation.
11. Before securing a part on a vise, place cushioning materials such as wood blocks, aluminum plates, or waste cloth between the part and the vise.

GENERAL TOOL

GENERAL TOOL SPECIFICATION

JOINTS AND CONNECTIONS

1. Remove the center exhaust pipe.
2. Remove the heat shield cover.
3. Check for any looseness of the yoke flange mounting bolts which connect to the rear differential and center bearing bracket mounting bolts.

SPLINES AND BEARING

1. Remove the center exhaust pipe.
2. Remove the rear exhaust pipe and muffler.
3. Remove the heat shield cover.
4. Turn the propeller shaft by hand to see if abnormal free play exists at splines. Also move yokes to see if abnormal free play exists at spiders and bearings.

Scheme 145

RUNOUT OF PROPELLER SHAFT

1. Remove the center exhaust pipe.
2. Remove the rear exhaust pipe and muffler.
3. Remove the heat shield cover.
4. Set the dial gauge with its indicator stem at the center of the propeller shaft tube.
5. Turn the propeller shaft slowly by hands to check for runout of the propeller shaft.

Runout

Limit: 0.6 mm (0.024 in)

Scheme 146

CENTER BEARING FREE PLAY

1. Remove the front and center exhaust pipes.
2. Remove the rear exhaust pipe and muffler.
3. Remove the heat shield cover.
4. Move the propeller shaft near the center bearing up, down, left, right by hand, to check for any abnormal free play of the bearings.

Scheme 147

Scheme 148

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Scheme 150

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Scheme 154

Scheme 155

Scheme 156

1. Disconnect the ground cable from the battery.
2. Lift up the vehicle, and remove the front wheels.
3. Lift the crimped section of axle nut.
4. Remove the axle nut using a socket wrench while depressing the brake pedal. CAUTION: Remove the wheel before loosening the axle nut. Failure to follow this rule may damage the wheel bearings.
5. Remove the stabilizer link.
6. Remove the disc brake caliper from the housing, and suspend it from strut using a wire.
7. Remove the disc rotor from the hub. NOTE: If it is difficult to remove the disc rotor from the hub, drive the 8 mm bolt into the threaded end of rotor, and then remove the rotor.
8. Remove the cotter pin and castle nut securing the tie-rod end to the housing knuckle arm.
9. Using a puller, remove the tie-rod ball joint from knuckle arm.
10. Remove the ABS wheel speed sensor assembly and harness.
11. Remove the bolts which secure the sensor harness to the strut.
12. Remove the front arm ball joint from the housing.
13. Remove the front drive shaft from the transmission.
14. Remove the front drive shaft assembly from the hub. If it is hard to remove, use the ST. ST1 926470000 AXLE SHAFT PULLER ST2 28099PA110 AXLE SHAFT PULLER PLATE
15. After scribing an alignment mark on camber adjusting bolt head, remove the bolts which connect the housing and strut, and disconnect the housing from strut.

Scheme 157

Scheme 158

Scheme 159

1. Align the alignment mark on the camber adjusting bolt head, and tighten the housing and strut using a new flange nut. Tightening torque: 155 N.m (15.8 kgf-m, 114.3 ft-lb)
2. Install the front drive shaft. Refer «INSTALLATION»(ref-357249-S39994918892010031100000) , Front Drive Shaft.
3. Install the front arm ball joint to the housing. Tightening torque: 50 N.m (5.1 kgf-m, 36.9 ft-lb)
4. Install the ABS sensor harness to the strut.
5. Install the ABS wheel speed sensor on the housing. Tightening torque: 7.5 N.m (0.76 kgf-m, 5.5 ft-lb)
6. Install the disc rotor to hub.
7. Install the disc brake caliper on the housing. Tightening torque: 80 N.m (8.2 kgf-m, 59 ft-lb)
8. Install the stabilizer link.
9. Connect the tie-rod end ball joint to the knuckle arm with a castle nut. Tightening torque: 27 N.m (2.8 kgf-m, 19.9 ft-lb) CAUTION: When connecting the tie-rod, do not hit the cap at bottom of tie-rod end with a hammer.
10. Tighten the castle nut to specified torque and tighten further within 60° until the pin hole is aligned with the slot in the nut. Bend the cotter pin to lock.
11. While depressing the brake pedal, tighten a new axle nut to the specified torque and lock it securely. Tightening torque: 220 N.m (22.4 kgf-m, 162.3 ft-lb) CAUTION: Do not install wheel and let it touch the ground before tightening the axle nut. Failure to follow this rule may damage the axle bearing. Do not overtighten the nuts as this may damage the axle bearing.
12. After tightening the axle nut, lock it securely.
13. Install the wheel. Tightening torque: 100 N.m (10.2 kgf-m, 73.8 ft-lb)
14. Connect the ground cable to battery.
15. Inspect the wheel alignment and adjust if necessary.

Scheme 160

Scheme 161

1. Remove the four bolts from the housing, and remove the front hub unit bearing and disc cover. CAUTION: Do not get closer the tool which charged magnetism to magnetic encoder. Be careful not to damage the magnetic encoder.
2. Disassemble the front hub unit bearing. Refer to «DISASSEMBLY»(ref-357249-S18930204032010031100000) , Front Hub Unit Bearing..

Scheme 162

Scheme 163

1. Assemble the front hub unit bearing. Refer to «ASSEMBLY»(ref-357249-S23234284142010031100000) , Front Hub Unit Bearing.
2. Place the disc cover between housing and front hub unit, and tighten the four bolts. Tightening torque: 65 N.m (6.6 kgf-m, 47.9 ft-lb) CAUTION: Do not get closer the tool which charged magnetism to magnetic encoder. Be careful not to damage the magnetic encoder.

Scheme 164

1. Moving the front tire up and down by hand, check there is no play in bearing, and check the wheel rotates smoothly.
2. Inspect the lean of axis direction using a dial gauge. Replace the bearing if the load range exceeds the limitation.

Service limit

Maximum: 0.05 mm (0.0020 in)

Scheme 165

Scheme 166

Scheme 167

1. Disconnect the ground cable from the battery.
2. Lift up the vehicle, and remove the front wheels.
3. Lift the crimped section of axle nut.
4. Remove the axle nut using a socket wrench while depressing the brake pedal. CAUTION: Remove the wheel before loosening the axle nut. Failure to follow this rule may damage the wheel bearings.
5. Remove the disc brake caliper from the housing, and suspend it from strut using a wire.
6. Remove the disc rotor from the hub. NOTE: If it is difficult to remove the disc rotor from the hub, drive the 8 mm bolt into the threaded end of rotor, and then remove the rotor.
7. Remove the four bolts from the housing. CAUTION: Do not get closer the tool which charged magnetism to magnetic encoder. Be careful not to damage the magnetic encoder.
8. Remove the front hub unit bearing. If it is hard to remove, use the ST.

ST1 926470000 AXLE SHAFT PULLER

ST2 28099PA110 AXLE SHAFT PULLER PLATE

Scheme 168

1. Place the disc cover between housing and front hub unit, and tighten the four bolts. Tightening torque: 65 N.m (6.6 kgf-m, 47.9 ft-lb)
2. Install the front drive shaft. Refer to «INSTALLATION»(ref-357249-S39994918892010031100000) , Front Drive Shaft -->.
3. Tighten the axle nut temporarily.
4. Install the disc rotor to hub.
5. Install the disc brake caliper on the housing. Tightening torque: 80 N.m (8.2 kgf-m, 59 ft-lb)
6. While depressing the brake pedal, tighten a new axle nut to the specified torque and lock it securely. Tightening torque: 220 N.m (22.4 kgf-m, 162.3 ft-lb) CAUTION: Do not install wheel and let it touch the ground before tightening the axle nut. Failure to follow this rule may damage the axle bearing. Do not overtighten the nuts as this may damage the axle bearing.
7. After tightening the axle nut, lock it securely.
8. Install the wheel.

Tightening torque

100 N.m (10.2 kgf-m, 73.8 ft-lb)

BUSHING

For the removal procedure of bushing, refer to "Rear Trailing Link" in "REAR SUSPENSION" in. REAR TRAILING LINK BUSHING .

REAR HUB UNIT BEARING

Assemble in the reverse order of disassembly.

Tightening torque

Rear hub unit bearing

65 N.m (6.6 kgf-m, 47.9 ft-lb)

For the installation procedure of bushing, refer to "Rear Trailing Link" in "REAR SUSPENSION" in REAR TRAILING LINK BUSHING .