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HOMESERVICE MANUALSSUBARU2004OUTBACK BASE, 4D WAGON, EJ251, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE (DIAGNOSTICS) (H4SO)BASIC DIAGNOSTIC PROCEDUREPROCEDUREAUTOMATIC TRANSMISSION
2004 Subaru Outback Base, 4D Wagon, EJ251, Standard

Automatic Transmission

2004 Subaru Outback Base, 4D Wagon, EJ251, StandardSECTION Automatic Transmission

When trouble code about automatic transmission is known on display, carry out the following basic check. After that, carry out the replacement or repair work.

  1. ATF level check; Refer to AUTOMATIC TRANSMISSION FLUID .
  2. Differential gear oil level check; Refer to DIFFERENTIAL GEAR OIL .
  3. ATF leak check; Refer to AUTOMATIC TRANSMISSION FLUID .
  4. Differential gear oil leak check; Refer to DIFFERENTIAL GEAR OIL .
  5. Stall test; Refer to STALL TEST .
  6. Line pressure test; Refer to LINE PRESSURE TEST .
  7. Transfer clutch pressure test; Refer to TRANSFER CLUTCH PRESSURE TEST .
  8. Time lag test; Refer to TIME LAG TEST .
  9. Road test; Refer to ROAD TEST .
  10. Shift characteristics; Refer to TRANSFER CLUTCH PRESSURE TEST .
RENDER: 1.0x

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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.