Differential Side Bearing Preload

WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Differential side bearing preload is controlled and adjusted by means of select-thickness shims sandwiched between the side bearing cups and the housing/cover.

NOTE: For accurate results, differential side bearing preload must only be measured when the pinion housing assembly is removed from the axle.

Fig 1: Pinion Housing Bolts

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Remove pinion housing-to-axle housing bolts (1). See Fig 1.

Fig 2: Pinion Depth Shim
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Remove pinion housing and depth shim (1) from axle assembly. See Fig 2.

Fig 3: Measuring Differential Rotating Torque
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Install Torque Tool C-4995 (1) to differential housing as shown. Measure and record differential rotating torque. See Fig 3.Differential rotating torque should be within 190-260 N.m (17-23 in. lbs.). If rotating torque is below this range, disassemble housing, measure and install slightly thicker preload shims (1). Add thickness equally to both sides. If rotating torque is above this range, disassemble housing, measure and install slightly thinner preload shims. Remove thickness equally from both sides.

Fig 4: Differential and Seal Removal/Installation
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Remove axle housing cover (5) and differential assembly (3). See Fig 4.

Fig 5: Install Tool 6514
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Remove differential side bearing cup from axle housing cover. Install Bearing Remover 6514 (1). See Figure.

Fig 6: Removing Differential Side Bearing Cup (Cover)
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Remove differential side bearing cup with Bearing Remover 6514 (1). See Figure.

Fig 7: Side Bearing Preload Shim
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Remove side bearing preload shim (1). See Figure.

Fig 8: Measuring Side Bearing Preload Shim
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Measure preload shim (1) to identify for replacement. See Figure.

Fig 9: Side Bearing Preload Shim
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Install new differential side bearing preload shim (1) into axle housing cover (2). See Figure.

Fig 10: Installing Side Bearing Cup (Cover)
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Using Handle C-4171 and Installer D-129 press new side bearing cup into cover until it bottoms. Use suitable cup (3) to support and protect cover.

Fig 11: Removing Inner Diff Side Bearing Cup
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Using Remover 9664 (1) and Slide Hammer C-637 (2) , remove differential side bearing (inboard) cup. See Fig 11.

Fig 12: Measuring Side Bearing Preload Shim
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Measure preload shim (1) to identify for replacement.
Install new differential side bearing preload shim (1) into axle housing. See Fig 12.
Using Handle C-4171 and Installer D-145, press differential side bearing cup into housing until it bottoms.

Fig 13: Differential and Seal Removal/Installation
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Install differential/ring gear assembly (3), new cover o-ring seal (4), and cover (5). See Fig 13.
Install and torque cover-to-housing bolts to:
- M10x40 - 65 N.m (48 ft. lbs.)
- M8x25 - 34 N.m (25 ft. lbs.)
Fig 14: Measuring Differential Rotating Torque
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Again verify rotating torque measurement (1). See Fig 14. Repeat adjustment procedure until proper rotating torque is obtained.

Fig 15: Pinion Depth Shim
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Install pinion housing assembly and depth shim (1). See Fig 15. Use new o-ring on housing.

Fig 16: Pinion Housing Bolts
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Install and torque pinion housing-to-axle housing bolts (1) to 34 N.m (25 ft. lbs.). See Fig 16.