Input Shaft Seal Replacement

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Fig 1: Input Shaft Seal

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
CAUTION: Do not damage the sealing surfaces of the transfer cases or the shafts when prying the seals for removal. Damaging the sealing surface may cause leakage or require replacement of the damaged component. Preliminary Procedure Remove the transfer case. Refer to Transfer Case Assembly Replacement .
1	Transfer Case Nut TIP: Use transfer case nuts to secure transfer case to assembly fixture J 45759 . Special Tools J 45759 Assembly Fixture
2	Transfer Case TIP: Insert the transfer case and assembly fixture into the bench holding fixture J 3289-20 and secure with pivot pin. Special Tools J 3289-20 Holding Fixture
3	Transfer Case Input Shaft Seal Procedure Remove the seal using an appropriate tool. Refer to Transfer Case Disassemble . Install the seal using J 42738 . Ensure the bore of the front case half is free of dirt, oil, and cleaning solvent. Double lip input shaft oil seals are used on applications with a WET adapter cavity. Single lip input shaft oil seals are used on applications with a DRY adapter cavity and with 6 speed transmission and are to be installed with the spring portion of the seal facing inward towards the internals of the transfer case. Special Tools J 42738 Seal Installer