Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2004 Subaru Baja Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Extension Case: Installation

Attach the selected thrust needle bearing to the end surface of reduction drive gear with vaseline.
NOTE: Install thrust needle bearing in the correct direction.
Install new gasket.
Install the extension case to the transmission case.
Tighten bolts to secure the case.
1. Tightening torque: 25 N.m (2.5 kgf.m, 18.1 ft.lb)
Fig 1: Installing Extension Case To Transmission Case
Courtesy of SUBARU OF AMERICA, INC.
Install the rear vehicle speed sensor.
1. Tightening torque: 7 N.m (0.7 kgf.m, 5.1 ft.lb)
- MPT MODEL
  
  Fig 2: Installing Rear Vehicle Speed Sensor - MPT Model
  Courtesy of SUBARU OF AMERICA, INC.
- VTD MODEL
  
  Fig 3: Installing Rear Vehicle Speed Sensor - VTD Model
  Courtesy of SUBARU OF AMERICA, INC.
Install the transmission assembly. Refer to INSTALLATION .

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready Tools Compare Repair Quote Quote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.