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.
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HOMESERVICE MANUALSSUBARU1991XT 4WD F4-1781CC 1.8L SOHCREPAIR AND DIAGNOSISSPECIFICATIONSCAPACITY SPECIFICATIONSFLUID - DIFFERENTIALDIFFERENTIAL-REAR
1991 Subaru XT 4WD F4-1781cc 1.8L SOHC
Differential-Rear
1991 Subaru XT 4WD F4-1781cc 1.8L SOHCSECTION Differential-Rear
FLUID
Standard 75W-90, 80W-90 GL-5
Above 30°F (0°C), 90; above -20°F (-30°C), 85W;
below 90°F (32°C), 80W
Limited-Slip 80W-90 GLS
CAPACITY, Refill:
All models 0.8 liters 1.6 pints
Standard 75W-90, 80W-90 GL-5
Above 30°F (0°C), 90; above -20°F (-30°C), 85W;
below 90°F (32°C), 80W
Limited-Slip 80W-90 GLS
CAPACITY, Refill:
All models 0.8 liters 1.6 pints
RENDER: 1.0x
NO RELATED
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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.