2002 MAZDA 6 differential

REAR DIFFERENTIAL
M–57
M
Side Bearing Inner Race Assembly Note
Caution
•Do not mix up the left and right side bearing inner races.
1. Press the side bearing inner races into the gear
case using the SSTs.
Thrust washer assembly note
1. Assemble the side gears, thrust washers and pinion gears to the gear case, then assemble the knock pin.
2. After assembling the knock pin, make a crimp so that the pin will not come out of the gear case.
3. Set a dial gauge to the pinion gear as indicated in
the figure.
4. Secure one of the side gears.
5. Move the pinion gear and measure the backlash
at the end of the pinion gear.
•If the backlash exceeds the standard, use the
thrust washers to adjust.
Standard backlash
0.1 mm {0.004 in} or less
Thrust washer thickness
mm {in}
17 Adjusting shim (L)
(See M–61 Adjusting Shim Assembly Note)
18 Spacer
19 Side bearing outer race
20 Rear differential component
21 Adjusting shim (R)22 Bearing cap
(See M–63 Bearing Cap Assembly Note)
23 Rear cover
(See M–64 Rear Cover Assembly Note)
24 Differential oil temperature sensor
25 Oil seal
(See M–64 Oil Seal Assembly Note)
49 F401 331
49 F401 337A
A6A63192020
Identification mark Thickness
F001 27 252 2.0 {0.079}
F001 27 253 2.1 {0.083}
F001 27 254 2.2 {0.086}
A6A63192021

M–58
REAR DIFFERENTIAL
Ring Gear Assembly Note
Caution
•The differential gear and ring gear could be damaged if the ring gear is installed with old thread-
locking compound remaining on the bolt threads. Before installing the ring gear, completely
remove the old thread-locking compound from the bolt threads.
1. Apply a small amount of thread-locking
compound to each of points A on the back of the
ring gear, and bolt thread areas B (around the
entire ring).
Application amount
Back of ring gear:
Approx. 0.32 ml {0.32 cc, 0.02 cu in}
Ring gear bolt thread points:
Approx. 0.32 ml {0.32 cc, 0.02 cu in}
(0.04 ml {0.04 cc, 0.002 cu in}
to each point)
2. Align the marks placed on the ring gear case at
the time of disassembly and tighten the bolts in
diagonal order.
Tightening torque
69—83 N·m {7.1—8.4 kgf·m, 50.9—61.2 ft·lbf}
Bearing Outer Race Assembly Note
1. Press in the bearing outer race using the SSTs
and a press.
A
B
A6A63192022
A6A63192023
49 M005 797
49 F027 007
49 F027 005
A6A63192024

REAR DIFFERENTIAL
M–59
M
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 8531 567), 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 G027 004) 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 G027 004
49 8531 565
49 8531 568
49 8531 567
49 G032 347
A6A63192025
49 0727 570
A6A63192026
49 0727 570
A6A63192027

M–60
REAR DIFFERENTIAL
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.
Pinion height
–0.025—0.025 mm {–0.001—0.001 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.
A6A63192028
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 F401 337A
A6A63192029

REAR DIFFERENTIAL
M–61
M
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), 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
240—441 N·m {24.5—44.9 kgf·m, 177—325
ft·lbf}
Drive pinion preload
1.3—1.8 N·m {13.3—18.3 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.
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.
49 L027 006
49 L027 007
A6A63192030
LOCKNUT
1.0 mm {0.04 in}
A6E63192032
A
A6A63192033
B
SPACER
A6E63192034

M–62
REAR DIFFERENTIAL
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.
Specification
Backlash:
0.09—0.11 mm {0.003—0.004}
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})
700 7.00 {0.276} 750 7.50 {0.295}
705 7.05 {0.278} 755 7.55 {0.297}
710 7.10 {0.279} 760 7.60 {0.299}
715 7.15 {0.281} 765 7.65 {0.301}
720 7.20 {0.283} 770 7.70 {0.303}
725 7.25 {0.285} 775 7.75 {0.305}
730 7.30 {0.287} 780 7.80 {0.307}
735 7.35 {0.289} 785 7.85 {0.309}
740 7.40 {0.291} 790 7.90 {0.311}
745 7.45 {0.293}——
A6A63192035

REAR DIFFERENTIAL
M–63
M
Bearing Cap Assembly Note
1. Align the bearing cap alignment marks to assemble the bearing cap.
Tightening torque
37—51 N·m {3.8—5.2 kgf·m, 28—37 ft·lbf}
2. Inspect the drive pinion and ring gear teeth
contact points.
(1) Coat both surfaces of the ring gear uniformly
with a thin red lead coating.
(2) While rotating the ring gear back and forth by
hand, rotate the drive pinion several times
and inspect the tooth contact.
(3) Inspect the tooth contacts in four locations
around the ring gear, and check that the tooth
contacts showing the red lead coating are the
same as the pattern indicated in the figure.
•If the tooth contact is good, wipe off the
red lead coating.
•If it is not good, adjust the pinion height,
then adjust the backlash.
(4) If toe and flank contact appears as shown in
the figure, replace the spacer with a thinner
one, and move the drive pinion outward.
(5) If heel and face contact appears as indicated
in the figure, replace the spacer with a thicker
one and move the drive the pinion inward.
MARK
A6E63192037
A6A63192038
A6A63192039
A6A63192040

M–64
REAR DIFFERENTIAL
Rear Cover Assembly Note
Caution
•Clean away the old sealant before applying the new sealant.
•Install the rear differential within 10 minutes after applying sealant.
•Allow the sealant to set at least 30 minutes after installation before filling the differential with the
specified oil.
1. Clean the alignment surface of the carrier and rear cover, and apply a thin coat of sealant.
2. Install the rear cover.
Tightening torque
15.7—22.6 N·m {1.6—2.3 kgf·m, 11.6—16.6 ft·lbf}
Oil Seal Assembly Note
1. Apply differential oil to the new oil seal lip.
2. Assemble the oil seal using the SSTs.
End Of Sie
49 G030 796
49 G030 797
A6A63192041