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 MANUALSMERCURY1991COUGAR LS, 3.8 4REPAIR AND DIAGNOSIS (SINGLE PAGE)DRIVELINES & AXLESDIFFERENTIALS & DRIVE AXLESDIFFERENTIALREMOVAL & INSTALLATIONDIFFERENTIAL ASSEMBLYINSTALLATION
1991 Mercury Cougar LS, 3.8 4
Differential Assembly: Installation
1991 Mercury Cougar LS, 3.8 4SECTION Installation
To install, reverse removal procedure. Fill differential with Rear Axle Lubricant (EOAZ-19580-AA) to bottom of oil filler hole.
CAUTION:
On models with Traction-Lok differential, add 3 ounces of Friction Modifier (C8AZ-19B546-A) to fluid level if axle has been drained.
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.