Replacement [08/2015 - 08/2019]: Procedure

WARNING: This page is about a different car, the 2019 Toyota 4Runner, 2018 Toyota 4Runner, 2017 Toyota 4Runner, and 2016 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

DRAIN TRANSFER OIL
Refer to PROCEDURE - Step 1
REMOVE REAR PROPELLER SHAFT ASSEMBLY
(Refer to REMOVAL [08/2015 - ] )
REMOVE REAR OUTPUT SHAFT COMPANION FLANGE SUB-ASSEMBLY
See step 7
REMOVE REAR TRANSFER OUTPUT SHAFT COMPANION FLANGE OIL SEAL
See step 8
REMOVE TRANSFER CASE REAR OIL SEAL

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Using SST, tap out the transfer case rear oil seal.
  - SST: 09308-00010
  NOTE:
  Be careful not to damage the transfer case rear oil seal and rear case contact surface.
INSTALL TRANSFER CASE REAR OIL SEAL

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Coat the lip of a new transfer case rear oil seal with MP grease.
2. Using SST and a hammer, tap in the transfer case rear oil seal until its surface is flush with the rear case upper surface.
  - SST: 09223-46011
  - SST: 09631-32020
INSTALL REAR TRANSFER OUTPUT SHAFT COMPANION FLANGE OIL SEAL
See step 44
INSTALL REAR OUTPUT SHAFT COMPANION FLANGE SUB-ASSEMBLY
See step 46
INSTALL PROPELLER SHAFT ASSEMBLY
(Refer to INSTALLATION [08/2015 - ] )
ADD TRANSFER OIL
See step 2
CHECK FOR TRANSFER OIL LEAK