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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 262 (Drive Axles - Full Floating Axle) >> Adjustments >> Side Bearing Preload

Side Bearing Preload

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NOTE: The differential side bearing preload is adjusted by the 2 adjusting nuts in the bearing bore. The bore and the bearing cap provide the mating threads for the bearing nut. The differential must be initially preloaded in order to determine the backlash of the gear set. After the backlash is set, the final bearing preload is set. The rotating torque of the drive pinion must be within specifications before the pinion gear bearing retainer can be installed.
  1. Install the drive pinion retainer and bearing assembly (10.5" ring gear) or drive pinion gear (11.5" ring gear). See DIFFERENTIAL ASSEMBLY  under OVERHAUL. The rotating torque of the drive pinion must be within specifications before installing the differential case assembly. Install the differential side bearing adjuster nuts. Install the differential case. Install the differential bearing caps. Install the differential bearing cap bolts. Tighten the bearing cap bolt finger-tight. DO NOT torque the bearing cap bolts at this time.
  2. Slide the differential case assembly towards the right side axle housing until the ring gear contacts the pinion. This is the zero backlash point. If zero backlash cannot be obtained, turn the right side differential bearing adjuster nut in towards the axle housing until the ring gear fully contacts the pinion to obtain the zero backlash.
  3. While holding the ring gear against the pinion, turn the left differential bearing adjuster nut out from the axle housing using the Bearing Adjustment Spanner (J-24429) until it contacts the differential side bearing. See Figure . Turn the right differential bearing adjuster nut out from the axle housing using the bearing adjustment spanner until it contacts the differential side bearing.
  4. Back off the left adjusting nut approximately 2 slots using the bearing adjustment spanner in order to obtain the initial backlash adjustment. Install the left adjuster nut lock and the adjuster nut lock bolt. DO NOT torque the lock bolt at this time.
  5. Firmly tighten the right differential bearing adjuster nut using the side bearing adjustment spanner in order to force the differential case assembly into solid contact with the left differential adjuster nut. Rotate the pinion several times in order to seat the bearings.
  6. Tighten the bearing cap bolts to specification. See TORQUE SPECIFICATIONS  . Tighten differential bearing adjuster lock bolts to specification. Measure the ring gear to pinion backlash and adjust, if necessary. See RING & PINION GEAR BACKLASH  .
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