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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 246 (Automatic Transaxle - 4T65-E - Overhaul) >> Repair Instructions >> Differential Carrier Inspection (FWD Only) >> Inspection Procedure

Inspection Procedure

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    Fig 1: Exploded View Of Differential Carrier Assembly (FWD Only)
    GM10592Courtesy of GENERAL MOTORS CORP.
  1. Inspect the differential carrier assembly (700) for the following conditions:
    • Damaged or worn teeth, bearing rollers, washers or pins on the differential planetary pinion gear
    • Damaged or worn teeth or splines on the final drive sun gear (697)
    • Damaged or worn teeth, splines or thrust washers on the differential side gear
    • Damaged or worn teeth, thrust washers or shaft on the differential pinion gear
    • Damaged or worn lugs or splines on the parking gear (696)
    • A damaged vehicle speed sensor reluctor wheel
    • Damaged internal gear/parking gear thrust bearing (695), differential carrier/sun gear thrust bearing (698) or differential carrier/case thrust bearing (715)
    • A damaged or worn differential carrier/case selective thrust washer (714)
    • A damaged differential/final drive carrier housing (700)
  2. Fig 2: Inspecting Sun Gear Shaft
    GM10593Courtesy of GENERAL MOTORS CORP.
  3. Inspect the final drive sun gear shaft (689) for the following conditions:
    • Damaged or worn splines
    • Cracks at lube oil holes
    • Damaged or worn bearing journals
  4. Fig 3: Measuring Differential Carrier Planetary Pinion Gear End Play
    GM10594Courtesy of GENERAL MOTORS CORP.
  5. Use a feeler gauge in order to measure the end play of the differential carrier planetary pinion gear.

    Specification:  End play should be 0.24-0.63 mm (0.009-0.025 in).

  6. If the end play check or the component inspection indicates a condition, repair the differential/final drive carrier assembly (700).