Jeep Differential Fluid Replacement

Use a socket wrench or an air gun to remove the bolts from the differential cover

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Make sure to keep the metal tag with the gear ratio and axle type information

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Place a bucket under the differential

Use a hammer to tap the cover and let the fluid drain out

Then, remove the cover

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While the cover is off, inspect the ring gear, pinion gear, and spider gears for any damage or missing/broken teeth

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Make sure the vehicle is in neutral so you can spin the gears

Check for metal shavings or sludge at the bottom of the differential

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Use brake parts cleaner to clean the inside of the housing

Wipe it down with paper towels and let it dry

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Clean the cover with brake parts cleaner, both inside and outside

Make sure to remove any old RTV or gasket material from the mating surface

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Apply a bead of RTV sealant around the mating surface of the differential cover, making sure to go around each bolt hole

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Use a dry finger to spread the RTV evenly over the surface

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Let it sit for a minute to become tacky.

Align the cover with the differential housing and press it into place

Reinstall the bolts and the metal tag you removed earlier, tightening them in a criss-cross pattern to ensure even pressure on the gasket

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After letting the RTV dry for a short time, remove the fill plug and fill the differential with gear oil until it starts to spill out of the fill hole

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Replace the fill plug and clean up any excess oil.