Extension Case: Disassembly

MPT MODEL
1. Take out the transfer clutch by lightly tapping the end of the rear drive shaft.
  NOTE: Be careful not to damage the oil seal in the extension.
  
  Fig 1: Removing Transfer Clutch By Lightly Tapping End Of Rear Drive Shaft
  Courtesy of SUBARU OF AMERICA, INC.
2. Remove the transmission clutch pipe without bending it.
  
  Fig 2: Removing Transmission Clutch Pipe Without Bending It
  Courtesy of SUBARU OF AMERICA, INC.
3. Remove the dust cover from the extension case.
4. Remove the oil seal from the extension case.
VTD MODEL
1. Using ST1, ST2, ST3 and a press, remove snap ring.
  ST1 398673600 COMPRESSOR
  
  ST2 498627100 Seat
  
  ST3 398663600 PLIERS
  
  Fig 3: Removing Snap Ring Using ST1, ST2, ST3 & Press
  Courtesy of SUBARU OF AMERICA, INC.
2. Remove the test plug.
  
  Fig 4: Removing Test Plug
  Courtesy of SUBARU OF AMERICA, INC.
3. Remove clutch piston using compressed air.
  
  Fig 5: Removing Clutch Piston Using Compressed Air
  Courtesy of SUBARU OF AMERICA, INC.
4. Remove the transmission clutch pipe without bending pipe.
  
  Fig 6: Removing Transmission Clutch Pipe Without Bending Pipe
  Courtesy of SUBARU OF AMERICA, INC.
5. Remove the dust cover from the extension case.
6. Remove the oil seal from the extension case.