Mazda CX 7. Manual - part 188

DIFFERENTIAL 

03-14–13

03-14

Spacer, Bearing Inner Race Assembly Note
Pinion height adjustment

Note

• Use the same spacer.

• Install the spacer with the chamfer on the SST side.

1. Assemble the spacer, the bearing inner race (rear 

bearing), and the SST O-ring to the SST (49 8531 
565) as shown in the figure.

2. Insert the set assembled in Step 1 to the 

differential gear from the rear.

3. Assemble the bearing inner race (front bearing), 

SST (49 G027 005), companion flange, washer, 
and locknut from the front of the differential gear.

4. Tighten the locknut to the extent that the SST (49 

8531 565) can be turned by hand.

5. Place the SST (49 0305 555) on top of the SST 

(49 8531 565).

6. Place the SST on the surface plate and set the 

dial indicator to zero.

7. Set the SST as shown in the figure.
8. Place the measuring probe of the dial indicator so 

that it contacts the place where the side bearing is 
installed in the carrier. Then measure the left and 
right side of the lower position.

49 0305 555

49 8531 565

49 8531 568

49 G027 005

49 G032 347

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49 0727 570

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49 0727 570

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DIFFERENTIAL 

03-14–14

9. Add the two (left and right) values obtained by the 

measurements taken in Step 8 and then divide 
the total by 2. From this result, subtract the result 
obtained by dividing the number inscribed on the 
end surface of the drive pinion by 100. (If there is 
no figure inscribed, use 0.) This is the pinion 
height adjustment value.

Rear differential pinion height

–0.032— 0.032 mm {–0.0012— 0.0012 in}

Note

• For example, the measured results obtained 

at Step 8 and 9 are 0.06 mm {0.003 in} and 
0.04 mm {0.002 in}, and the figure inscribed 
on the end of the drive pinion is 2:
((0.06 mm {0.003 in}+ 0.04 mm {0.002 in}) / 
2) – (2/100) = 0.03 mm {0.001 in} (pinion 
height adjustment value)
Replace with a spacer 0.03 mm {0.001 in} 
thicker than the currently used one. Spacer 
thickness is set at 0.015 mm {0.0006 in} 
increments, therefore select the closest 
spacer thickness and assemble.

• Install the spacer with the chamfer on the 

SST side.

Spacer thickness

10. Assemble the spacer selected for the pinion height adjustment to the drive pinion.
11. Press the bearing inner race (rear bearing) into 

the drive pinion using the SSTs and a press.
Substitution SST

• 49 V001 525

Outer diameter: 37.2— 50.3 mm {1.47— 1.98 
in}
Inner diameter: 35.2 mm {1.39 in} or more
Inner depth: 134.3 mm {5.29 in} or more
Plate thickness: 1 mm {0.04 in} or more

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Identification mark

Thickness (mm {in})

Identification mark

Thickness (mm {in})

08

3.08 {0.1213}

29

3.29 {0.1295}

09

3.095 {0.1219}

30

3.305 {0.1301}

11

3.11 {0.1224}

32

3.32 {0.1307}

12

3.125 {0.1230}

33

3.335 {0.1313}

14

3.14 {0.1236}

35

3.35 {0.1319}

15

3.155 {0.1242}

36

3.365 {0.1325}

17

3.17 {0.1248}

38

3.38 {0.1331}

18

3.185 {0.1254}

39

3.395 {0.1337}

20

3.20 {0.1260}

41

3.41 {0.1343}

21

3.215 {0.1266}

42

3.425 {0.1348}

23

3.23 {0.1272}

44

3.44 {0.1354}

24

3.245 {0.1278}

45

3.455 {0.1360}

26

3.26 {0.1283}

47

3.47 {0.1366}

27

3.275 {0.1289}

— 

— 

49 F401 331

49 V001 525

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DIFFERENTIAL 

03-14–15

03-14

Locknut Assembly Note
Drive pinion preload adjustment

1. Apply differential oil to a new locknut.
2. Assemble a new collapsible spacer, bearing inner race (front bearing), spacer and locknut to the drive pinion, 

and temporarily tighten the locknut.

3. Turn the serrated part of the drive pinion by hand to seat the bearing.
4. Tighten the locknut temporarily tightened in Step 

1 from the lower limit of the specified tightening 
torque using the SSTs, and make this the 
specified preload.

• If the specified preload cannot be obtained 

within the specified tightening torque, replace 
the collapsible spacer and inspect again.

Tightening torque

167— 226 N·m {17.1— 23.0 kgf·m, 124— 166 

ft·lbf}

Rear differential drive pinion preload

1.3— 1.8 N·m {13.3— 18.2 kgf·cm, 11.5— 15.9 

in·lbf}

5. Crimp the locknut using a chisel and hammer.

Adjusting Shim Assembly Note

1. Assemble the differential carrier to the SSTs.
2. Assemble the spacer to the differential carrier.
3. Stack the side bearing outer race and gear case 

component on the surface plate as indicated in 
the figure, and measure the height using a caliper 
and a ruler. This is value A.

4. Measure the width of the installed differential in 

the differential carrier with the spacer installed. 
This is value B.

5. The combined thickness of the left and right 

adjusting shims is obtained by the following 
formula.
C

1

 = B – A + 0.15 mm {0.006 in}

C

2

 = B – A + 0.44 mm {0.017 in}

6. If the combined thickness of the previously 

installed adjusting shims is between C1 and C2, 
use the shims as they are.

49 L027 006

49 L027 007

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LOCKNUT

1.0 mm {0.04 in}

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A

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B

SPACER

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DIFFERENTIAL 

03-14–16

7. If the combined thickness of the previously installed adjusting shims is not between C1 and C2, or if the 

adjusting shims have to be replaced, select two appropriate adjusting shims from the table below.

Adjusting shim thickness

Caution

• If adjusting shims are to be reused, do not mix up the left and right shims.

• Do not mix up the left and right side bearing outer races and spacers.

8. Assemble the selected adjusting shims to the differential carrier ring gear side, and the spacer to the opposite 

side.

9. Assemble the differential and bearing outer race to the differential carrier.

10. Tap the selected adjusting shim between the 

spacer and the bearing race with a plastic 
hammer as shown in the figure.

11. Align the bearing cap alignment marks to 

assemble the bearing cap, and temporarily 
tighten the bolts.

12. Place the dial indicator so that the measuring 

probe contacts the top surface of one of the ring 
gear teeth perpendicularly.

13. Secure the drive pinion and measure the 

backlash from when the ring gear moved.

Rear differential backlash of drive pinion and 

ring gear

Standard: 0.09— 0.11 mm {0.003— 0.004 in}
Minimum value: 0.05 mm {0.002 in}

Note

• Measure the backlash at 4 locations around the ring gear. Make sure one of the 4 locations is within 

specification, and the minimum value for the 4 locations is 0.5 mm {0.002 in} or less.

14. If the backlash is not within the specification, adjust the gear case component by moving it in the axial direction.

Note

• When moving the gear case component in the axial direction, replace the adjusting shims. If the adjusting 

shim on the right side is replaced with one that is 0.05 mm {0.002 in} thicker, replace the one on the left 
with one that is 0.05 mm {0.002 in} thinner.

Identification mark

Thickness (mm {in})

Identification mark

Thickness (mm {in})

350

3.50 {0.137}

410

4.10 {0.161}

355

3.55 {0.139}

415

4.15 {0.163}

360

3.60 {0.141}

420

4.20 {0.165}

365

3.65 {0.143}

425

4.25 {0.167}

370

3.70 {0.145}

430

4.30 {0.169}

375

3.75 {0.147}

435

4.35 {0.171}

380

3.80 {0.149}

440

4.40 {0.173}

385

3.85 {0.151}

445

4.45 {0.175}

390

3.90 {0.153}

450

4.50 {0.177}

395

3.95 {0.155}

455

4.55 {0.179}

400

4.00 {0.157}

460

4.60 {0.181}

405

4.05 {0.159}

— 

— 

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