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.
1977 Subaru GF Automatic TransFACTORY OEM SERVICE PROCEDURE
Datsun Models
Ensure battery has a full charge, then connect a 30-volt voltmeter as shown in illustration, and test as follows:
- Detach connectors at alternator. Connect a test probe from voltmeter positive terminal to "N" or "BAT" terminal. Connect other test probe to ground. Check that voltmeter registers battery voltage.
- Turn on headlights to high beam. Start engine and increase speed to approximately 1000 RPM and observe voltmeter. If voltmeter registers below 12.5 volts, alternator is defective. If above 12.5 volts, alternator is good.
Factory Service Tools
Use the Manual With the Right Hardware
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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.