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Use the following special tools to press-fit a new oil seal.
- Installer bar (MB990938)
- Oil seal installer (MB991115)
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Use the following special tools to press-fit the drive pinion rear bearing outer race.
- Installer bar (MB990938)
- Installer adapter (MB990935)
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Use the following special tools to press-fit the drive pinion front bearing outer race.
- Installer bar (MB990938)
- Installer adapter (MB990932)
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Adjust the drive pinion height by the following procedures:
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1.Apply multipurpose grease to the washer of special tool drive pinion gauge assembly (MB990836).
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2.
| caution |
There should be no gear oil adhered to the bearing.
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Install the special tool, drive pinion front and rear bearing inner races to the differential carrier as shown in the illustration.
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3.Tighten the nut of the special tool a little at a time, while measuring the turning torque of the drive pinion by using the following special tools. Then confirm that the turning torque (without the drive pinion oil seal) is at the standard value.
- Preload socket (MB990326)
- Torque wrench (MB990685)
Standard value:
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Bearing type
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Bearing lubrication
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Turning torque
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New
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None (with anti-rust agent)
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0.88 - 1.17 N·m
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Gear oil applied
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0.39 - 0.49 N·m
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Because special tool preload socket (MB990326) cannot be turned one turn, turn it several times within the range that it can be turned; then, after fitting to the bearing, measure the turning torque.
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4.Clean the side bearing seat of the differential carrier and bearing caps.
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5.Place the following special tools in the side bearing seat of the differential carrier, and position the notch as shown in the illustration. Then install the bearing caps.
- Cylinder gauge (MB990392)
- Drive pinion gauge assembly (MB990836)
6.Use a thickness gauge to measure the clearance (A) between special tools.
7.Remove the bearing caps and special tools.
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8.Use a micrometer to measure the shown dimensions (B, C) of special tools.
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9.Install the bearing cap, and then use a cylinder gauge to measure the inside diameter (D) of the bearing cap.
10.Calculate thickness (F) of the required drive pinion rear shim by the following formula. Select a shim which most closely matches this thickness.
F = A + B + C - 1/2D - 86.00 mm
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11.Fit the selected drive pinion rear shim(s) to the drive pinion, and press-fit the drive pinion rear bearing inner race by using special tool bearing installer (MB990728).
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Adjust the drive pinion turning torque by the following procedures:
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1.Insert the drive pinion into the differential carrier, and then install the following parts in sequence from the carrier rear side: drive pinion spacer, drive pinion front shim , drive pinion front bearing inner race and companion flange.
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Do not install the oil seal.
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2.Tighten the companion flange self-locking nut to the specified torque while holding the companion flange with special tool end yoke holder (MB990850).
Tightening torque: 190 ± 30 N·m
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3.
| caution |
There should be no gear oil adhered to the bearing.
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Use the following special tools to measure the drive pinion turning torque (without the drive pinion oil seal).
- Preload socket (MB990326)
- Torque wrench (MB990685)
Standard value:
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Bearing type
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Bearing lubrication
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Turning torque
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New
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None (with anti-rust agent)
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0.88 - 1.17 N·m
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Gear oil applied
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0.39 - 0.49 N·m
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4.If the drive pinion turning torque is not within the standard value, adjust the turning torque by replacing the drive pinion front shim(s) or the drive pinion spacer.
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When selecting the drive pinion front shims, if the number of shims is large, reduce the number of shims to a minimum by selecting the drive pinion spacers.
Select the drive pinion spacer from the following two types.
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Height of drive pinion spacer (A) mm
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Identification colour
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57.08
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Red
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57.72
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-
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5.Remove the companion flange and drive pinion again. Then insert the drive pinion front bearing inner race into the differential carrier. Use special tool oil seal installer (MB990727) to press-fit the drive pinion oil seal.
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6.Install the drive pinion assembly and companion flange with the mating marks properly aligned. Tighten the companion flange self-locking nut to the specified torque while holding the companion flange with special tool end yoke holder (MB990850).
Tightening torque: 190 ± 30 N·m
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7.Use special tools to measure the drive pinion turning torque (with drive pinion oil seal) to verify that the drive pinion turning torque complies with the standard value.
Standard value:
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Bearing type
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Bearing lubrication
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Turning torque
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New
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None (with anti-rust agent)
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0.98 - 1.27 N·m
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Gear oil applied
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0.49 - 0.58 N·m
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8.If the turning torque is not within the standard value, check the tightening torque of the companion flange self-locking nut, and the installation of the oil seal.
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1.Clean the drive gear attaching bolts.
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2.Remove the adhesive adhered to the threaded holes of the drive gear by turning the tap (M10 x 1.25). Clean the threaded holes by applying compressed air.
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3.Apply the specified sealant to the threaded holes of the drive gear.
Specified sealant: LOCTITE No.217 or No.270 or equivalent
4.Install the drive gear onto the limited slip differential case with the mating marks properly aligned. Tighten the drive gear attaching bolts to the specified torque in a diagonal sequence.
Tightening torque: 84 ± 4 N·m
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Use special tool bearing installer (MB990728) to press-fit the differential side bearing inner races into the differential case.
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Adjust the final drive gear backlash by the following procedure:
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1.Assemble the differential case with the side bearing outer race to the differential carrier.
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2.Press the differential case to one side to measure the clearance of the side bearing outer race and the differential carrier.
3.Select two pairs of side bearing spacers. Determine the thickness by adding 1/2 of the clearance to the pre-load 0.05mm.
4.Assemble the selected side bearing spacers to each side.
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5.Measure the final drive gear backlash at four points or more on the circumference of the drive gear.
Standard value: 0.11 - 0.16 mm
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6.If the backlash is not within the standard value, move the side bearing spacer as shown in the illustration to adjust the backlash.
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The increment of side bearing spacer must be the same as the decreased amount.
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7.Inspect the tooth condition at the final drive gear and replace if required. (Refer to  .)
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8.Measure the drive gear runout.
Limit: 0.05 mm
9.If drive gear runout exceeds the limit, remove the differential case and then the drive gears, moving them to different positions and reinstall them.
10.If adjustment is not possible, replace the differential case or drive gear and drive pinion as a set.
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