27-1

GROUP 27

REAR AXLE
CONTENTS

GENERAL DESCRIPTION. . . . . . . . . 27-2 REAR HUB ROTARY-SLIDING RESISTANCE

CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27-4
REAR AXLE DIAGNOSIS . . . . . . . . . 27-2 HUB BOLT REPLACEMENT. . . . . . . . . . . . 27-4
INTRODUCTION TO REAR AXLE
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . 27-2 REAR AXLE HUB ASSEMBLY . . . . . 27-5
REAR AXLE DIAGNOSTIC REMOVAL AND INSTALLATION . . . . . . . . 27-5
TROUBLESHOOTING STRATEGY . . . . . . 27-2 INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 27-6
SYMPTOM CHART. . . . . . . . . . . . . . . . . . . 27-2
SYMPTOM PROCEDURES . . . . . . . . . . . . 27-3 KNUCKLE . . . . . . . . . . . . . . . . . . . . . . 27-7
REMOVAL AND INSTALLATION . . . . . . . . 27-7
SPECIAL TOOLS. . . . . . . . . . . . . . . . 27-3 INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 27-8

ON-VEHICLE SERVICE. . . . . . . . . . . 27-4 SPECIFICATIONS . . . . . . . . . . . . . . . 27-8

WHEEL BEARING END PLAY CHECK . . . 27-4 FASTENER TIGHTENING
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . 27-8
SERVICE SPECIFICATIONS . . . . . . . . . . . 27-8
27-2 REAR AXLE
GENERAL DESCRIPTION

G EN ER AL DESC RIPTIO N
M1271000100069
The rear axle consists of a knuckle, rear hub, unit ABS rotor for detecting the vehicle speed is located
bearing. The unit bearing is press-fitted to the rear on the hub assembly, and a speed sensor is located
hub and bolted to the knuckle. Also, the unit bearing on the knuckle.
utilizes the same type of double row angular contact
ball bearing as does the front axle.

OIL SEAL KNUCKLE

REAR HUB

CAP

ABS ROTOR
OIL SEAL <VEHICLES WITH ABS>

UNIT BEARING

AC001179 AB

R EAR AXLE D IA G N O SIS

INTRODUCTION TO REAR AXLE DIAGNOSIS
M1271004100072
Noise from the rear axle may be caused by defects in
the components.
REAR AXLE DIAGNOSTIC TROUBLESHOOTING STRATEGY
M1271004200079
Use these steps to plan your diagnostic strategy. If 2. Verify that the condition described by the
you follow them carefully, you will be sure that you customer exists.
have exhausted most of the possible ways to find a 3. Find the malfunction by following the Inspection
rear axle fault. Chart for Trouble Symptoms.
1. Gather information from the customer. 4. Verify malfunction is eliminated.
SYMPTOM CHART
M1271004300076

SYMPTOM INSPECTION PROCEDURE REFERENCE PAGE

Abnormal noise 1 P.27-3

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 REAR AXLE 27-3
SPECIAL TOOLS

SYMPTOM PROCEDURES
M1271004400103

INSPECTION PROCEDURE 1: Abnormal Noise

DIAGNOSIS STEP 3. Check the brake disc for bent or

distortion.
STEP 1. Check the wheel nut for looseness. Q: Is the brake disc in good condition?
Q: Are the wheel nuts loosened? YES : Go to Step 4.
YES : Tighten the nuts, then go to Step3. NO : Replace the part, then go to Step 4.
NO : Go to Step 2.
STEP 4. Check trouble symptoms.
STEP 2. Check the wheel bearing for wear or Q: Are any noises generated?
damage. YES : Return to Step 1.
Q: Is the wheel bearing in good condition? NO : This diagnosis is complete.
YES : Go to step 3.
NO : Replace the part, then go to Step 4.

SPECIAL TO O LS
M1271000600064

TOOL TOOL NUMBER AND SUPERSESSION APPLICATION

NAME
MB990767 MB990767-1 Hub fixing
End yoke holder

MB990767

MB991618 General service tool Hub bolt removal

Hub bolt remover

MB991618

MB991248 Tool not available ABS rotor removal

Inner shaft remover

MB991248

MB990635 or MB991113 MB991113-1, MB990635- Ball joint disconnection

Steering linkage puller 01 or General service tool

MB990635

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27-4 REAR AXLE
ON-VEHICLE SERVICE

O N-VEH ICLE SERVIC E

WHEEL BEARING END PLAY CHECK
M1271000900076
1. For vehicles with rear disc brakes, remove the caliper
assembly, suspend the caliper assembly with a wire and
remove the brake disc.
2. For vehicles with rear drum brakes, remove the brake drum.
3. Check the bearing's end play.
Place a dial gauge against the hub surface; then move the
hub in the axial direction and check whether or not there is
end play.
AC001180
Limit: 0.05 mm (0.002 inch)
4. If the play exceeds the limit value, replace the rear hub
assembly.

REAR HUB ROTARY-SLIDING RESISTANCE

CHECK
M1271001100051
1. For vehicles with rear disc brakes, remove the caliper
assembly, suspend the caliper assembly with a wire and
remove the brake disc.
2. For vehicles with rear drum brakes, remove the brake drum.
3. After turning the hub a few times to seat the bearing, wind a
rope around the hub bolt and turn the hub by pulling at a 90
degree angle with a spring scale. Measure to determine
whether or not the rotary-sliding resistance of the rear hub is
at the limit value.
AC001181
Limit: 18 N⋅m (13 ft-lb)
4. If the rotary-sliding resistance exceeds the limit value,
replace the rear hub assembly.

HUB BOLT REPLACEMENT

M1271001000054

Required Special Tools:

• MB990767: End Yoke Holder
• MB991618: Hub Bolt Remover
1. For vehicles with rear disc brakes, remove the caliper
assembly, suspend the caliper assembly with a wire and
remove the brake disc.
2. For vehicles with rear drum brake, remove the brake drum.
3. Pull the hub bolt out using special tools MB990767 and
MB991618 MB991618.
MB990767
NOTE: For vehicles with drum brakes, the hub bolts should
be removed near the retainer spring installation position in
order to maintain enough clearance for removal.

AC001182 AB

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 REAR AXLE 27-5
REAR AXLE HUB ASSEMBLY

4. Install the plain washer to the new hub bolt, and install the
bolt with a nut.
MB990767

PLAIN
WASHER

AC001183 AB

REA R A XLE H U B ASSEM B LY

REMOVAL AND INSTALLATION
M1271002000057

CAUTION
The rear hub unit bearing should not be dismantled.

<VEHICLES WITH REAR DRUM BRAKE>

1
81 ± 7 N·m
60 ± 5 ft-lb
3

7
8

<VEHICLES WITH REAR DISC BRAKE>

81 ± 7 N·m
60 ± 5 ft-lb 1
55 ± 5 N·m
41 ± 3 ft-lb

60 ± 5 N·m 4
45 ± 3 ft-lb

7
8
6 AC000977 AD

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27-6 REAR AXLE
REAR AXLE HUB ASSEMBLY

REMOVAL STEPS REMOVAL STEPS (Continued)

1. REAR WHEEL SPEED SENSOR 7. ABS ROTOR <VEHICLES WITH
<<B>> >>A<<
<VEHICLES WITH ABS> (REFER ABS>
TO GROUP 35B P.35B-53.) <<C>> 8. BACKING PLATE
<<A>> 2. CALIPER ASSEMBLY Required Special Tool:
3. BRAKE DRUM • MB991248: Inner Shaft Remover
4. BRAKE DISC
5. BRAKE HOSE INSTALLATION
BRACKET
6. REAR HUB ASSEMBLY

REMOVAL SERVICE POINTS

<<A>> CALIPER ASSEMBLY REMOVAL
Remove the caliper assembly and suspend it with a wire.
<<B>> ABS ROTOR REMOVAL
Use special tool MB991248 to remove the ABS rotor.
SOCKET
MB991248

AC001185 AB

<<C>> BACKING PLATE REMOVAL

Remove the backing plate and suspend it.

INSTALLATION SERVICE POINT

>>A<< ABS ROTOR INSTALLATION
SOCKET
Install the ABS rotor as shown in the illustration.

ABS ROTOR

AC001186 AB

INSPECTION
M1271002100065
• Check the oil seal for crack or damage.
• Check the ABS rotor for chipped teeth.

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 REAR AXLE 27-7
KNUCKLE

KN UC KLE
REMOVAL AND INSTALLATION
M1271003000061

CAUTION
*
: Indicates parts which should be temporarily tightened, and then fully tightened with the vehicle on
the ground in the unladen condition.
Pre-removal Operation Post-installation Operation
Rear Axle Hub Assembly Removal (Refer to P.27-5.) • Check the Dust Cover for Cracks or Damage by Pushing
It with Finger.
• Rear Axle Hub Assembly Installation (Refer to P.27-5.)

5 98 ± 10 N·m*
73 ± 7 ft-lb*

7
98 ± 10 N·m
73 ± 7 ft-lb
29 ± 4 N·m
21 ± 4 ft-lb

6
128 ± 9 N·m*
94 ± 7 ft-lb*

108 ± 10 N·m*
2 AC001187 AB
80 ± 7 ft-lb*
REMOVAL STEPS REMOVAL STEPS (Continued)
1. TRAILING ARM CONNECTION 6. HUB CAP
2. LOWER ARM CONNECTION 7. KNUCKLE
<<A>> 3. TOE CONTROL ARM CONNECTION Required Special Tool:
4. SHOCK ABSORBER CONNECTION • MB991113 or MB990635: Steering Linkage Puller
5. UPPER ARM CONNECTION

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27-8 REAR AXLE
SPECIFICATIONS

REMOVAL SERVICE POINT

<<A>> TOE CONTROL ARM DISCONNECTION
MB991113 OR MB990635 CAUTION
NUT • Loosen the nut from the ball joint instead of removing
it.
CORD • Hang special tool MB991113 or MB990635 with a cord,
etc. to prevent it from falling.

BALL JOINT
ACX01123AB

INSPECTION
M1271003100046
Check the knuckle for wear or cracks.

SPECIFICATIO NS
FASTENER TIGHTENING SPECIFICATIONS
M1271004000064

ITEMS SPECIFICATIONS
Brake caliper assembly bolt <flange bolt> 60 ± 5 N⋅m (45 ± 3 ft-lb)
Brake caliper assembly bolt <bolt and washer> 55 ± 5 N⋅m (41 ± 3 ft-lb)
Lower arm assembly to knuckle jam nut 108 ± 10 N⋅m (80 ± 7 ft-lb)
Rear hub assembly bolt 81 ± 7 N⋅m (60 ± 5 ft-lb)
Shock absorber assembly to knuckle bolt 98 ± 10 N⋅m (73 ± 7 ft-lb)
Toe control arm assembly to knuckle jam nut 29 ± 4 N⋅m (21 ± 4 ft-lb)
Trailing arm assembly to knuckle nut 128 ± 9 N⋅m (94 ± 7 ft-lb)
Upper arm assembly to knuckle nut 98 ± 10 N⋅m (73 ± 7 ft-lb)

SERVICE SPECIFICATIONS
M1271000300063

ITEMS LIMIT
Wheel bearing end play mm (in) 0.05 (0.002)
Rear hub rotary-sliding resistance N⋅m (ft-lb) 18 (13)

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