Transmission Output Shaft Seal Replacement (Four Wheel Drive)

WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban 3500 HD, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Transmission Output Shaft Seal (4WD)

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedure Remove the transfer case adapter from the transmission. Refer to Transfer Case Adapter Replacement .
1	Output Shaft Seal Procedure Use the J-6125-B hammer and J-36825-A remover to remove the seal. Use care in order to avoid damaging the output shaft bushing. Lubricate the seal with clean transmission fluid. Use the DT-50648 installer to install the seal. Special Tools DT-50648 Case Seal Installer J-6125-B Slide Hammer with Adaptor J-36825-A Output Shaft Oil Seal Remover For equivalent regional tools, refer to Special Tools .

Callout

Component Name

Preliminary Procedure
Remove the transfer case adapter from the transmission. Refer to Transfer Case Adapter Replacement .

Output Shaft Seal

Procedure

Use the J-6125-B hammer and J-36825-A remover to remove the seal. Use care in order to avoid damaging the output shaft bushing.
Lubricate the seal with clean transmission fluid.
Use the DT-50648 installer to install the seal.

Special Tools

DT-50648 Case Seal Installer
J-6125-B Slide Hammer with Adaptor
J-36825-A Output Shaft Oil Seal Remover

For equivalent regional tools, refer to Special Tools .