Subaru Legacy & Legacy GT 2005–2008 Service Manual Set

The wiring and mechanism articles explain circuit layout and system operation, while the service chapters provide system-specific diagnosis and repair procedures. Their year and configuration references help identify the applicable material before planning tests or disassembly.

Coverage limits: This is a collection of selected service information, not a continuous workshop manual covering every system for every listed year. The 5AT article explains construction and operation rather than overhaul. Broader configurations in the owner's manual, including the 2.5GT spec.B, do not extend the repair coverage to those configurations.

PDF Search, Diagram Detail and File Layout

Search and diagram access: Text search is available in 432 PDFs. The 34 PDFs covering the generic code list, Mitchell wiring diagrams, suspension articles and mechanism references do not support text search. No embedded PDF bookmarks are included. Small pin numbers and wire-color labels in representative wiring diagrams require zooming for comfortable reading.

The ZIP contains 466 printable PDFs totaling 3,310 pages, including the separate code reference and 42 blank, heading-only or section-end pages. These pages are already included in the publication totals above.

Engine, Drivetrain and Electrical Work

The following selected coverage highlights summarize the main workshop content. Additional topics include hill-holder inspection and AUX input terminal service.

• Engine repair: Step-by-step procedures for engine removal, timing-belt service, valve-clearance inspection, cylinder-head disassembly and cylinder-block repair in the H4SO and H4DOTC sections.

• Fuel and turbo systems: Fuel-injection and EVAP diagnosis, fuel-pressure testing, intercooler and turbocharger removal, TGV components, wastegate control and secondary-air system service.

• Transmission work: 4AT operational and pressure tests, removal and internal repair; selected 5MT teardown, synchronizer, shaft, transfer-gear and adjustment procedures.

• Electrical diagnosis: System wiring diagrams, power and ground distribution, ECM input/output references, component locations, starting-failure charts and Subaru Select Monitor workflows.

• ABS and braking: Warning-light checks, DTC reading and clearing, wheel-speed-sensor circuit diagnosis, inspection mode and ABS/EBD operating information.

• Suspension and steering: Wheel alignment, strut and arm service, stabilizers and suspension links, steering-gear work, pressure testing, bleeding and fault diagnosis.

• HVAC service: Refrigerant recovery and charging, leak testing, compressor-oil information, blower and heater components, condenser and evaporator service, switches and cabin sensors.

The service chapters suit technicians and experienced owners comfortable with wiring diagrams, precision measurements and the specified diagnostic equipment; the owner's manual addresses everyday operation and owner maintenance.

Engine Diagnosis and Mechanical Repair

H4SO and H4DOTC diagnostic material includes engine-condition data, DTC detecting criteria, inspection modes and drive cycles. Starting-failure charts separate starter-circuit, ECM power/ground, ignition, fuel-pump and injector checks, supporting fault isolation before components are removed.

Mechanical sections extend into overhaul preparation, sprockets, rocker and camshaft work, valves, pistons, connecting rods and crankshaft inspection. Turbo-specific material covers the air-bypass valve, fuel-pump control and secondary-air equipment.

The H4SO files also contain cooling-system, lubrication, starter and generator service procedures. Turbo cooling, lubrication and starting/charging files include cross-references, so their presence should not be read as a complete set of matching component-repair chapters.

4AT, 5MT and 5AT Scope

4AT: Internal coverage reaches the torque-converter and transfer clutches, extension case, center differential carrier, drive pinion, front differential, oil pump, seals and main case. The control valve body is treated as a replacement assembly, not an internally rebuildable unit.

Road, stall, time-lag, line-pressure and transfer-clutch pressure tests support diagnosis. Some installation instructions reference separate valve-body bleeding and learning-control chapters rather than reproducing those procedures.

5MT: The extracts cover mainshaft and synchronizers, transfer gears, center differential, reverse mechanisms, shift forks and rods. Adjustment information includes shim selection, hypoid backlash, bearing preload, end play, neutral position and reverse-check settings; some front-differential procedures are cross-referenced rather than reproduced.

5AT: Construction and operating material includes clutch and brake elements, planetary gearing, valve-body and solenoid arrangements, hydraulic control, lockup, power flow, adaptive control and fail-safe charts.

Wiring, Chassis and Supporting Systems

Diagram examples include Engine Performance Circuits, Ground Distribution, Air Conditioning Circuits, ECM I/O references, 5AT valve-body views with hydraulic-control charts, and ABS hydraulic-control/EBD graphs.

ABS material explains the integrated ABSCM/H/U, valve and motor relays, pressure increase/hold/decrease control, wheel-speed and G-sensor inputs, and electronic brake-force distribution.

Suspension specifications distinguish sedan and wagon builds and 2.5i, 2.5GT and Outback configurations. Hub and bearing construction appears in the drive-shaft reference material. Separate service chapters cover steering pumps, columns, pipes and reservoirs, SRS post-collision inspection, periodic maintenance, instruments and audio/accessory systems.

Referenced equipment includes Subaru Select Monitor kit 1B020XU0, 4AT pressure gauge 498575400, 5MT drive-pinion gauge 499917500 and power-steering pressure gauge 925711000.

Repair Notes and Safety

The 4AT cautions explain how contamination from oil-pan handling or unsuitable cleaning cloths can enter the valve body and cause hydraulic-control faults. The 5MT case instructions warn about mixing bearing races or trapping shims, which can disturb gear alignment and bearing adjustment.

Yellow SRS wiring runs near ABS wheel-speed-sensor and ABSCM/H/U circuits; probing or damaging that harness can compromise restraint-system components.

ABS hydraulic service, SRS work, refrigerant recovery/charging, pressure testing, and engine or transmission removal require proper isolation, support equipment, and competent shop practice.

A Preview of 5MT Backlash and Bearing Settings

The 5MT transmission-case specifications give hypoid gear backlash of 0.13–0.18 mm, alongside drive-pinion shim tables and mainshaft rear-plate selection data.

The drive-pinion chapter specifies starting torque of 0.3–0.8 N·m for thrust-bearing preload adjustment. This is a rotational resistance measurement used with the adjusting-washer information, rather than a fastener-tightening torque.