S80 1st gen. Trans Fluid & Filter Change How-To

This is for the first generation S80 cars that use the GM 4T65E automatic transmission.

Tools and supplies you will need: Jack and jackstands, 12mm socket and ratchet, 10mm socket and ratchet, New filter, 7 quarts of Dexron III or VI ATF, Drain pan, Disc brake cleaner, Paper towels or rags.

Start by chocking the wheels and jacking up the front of the car. Position the jackstands to prevent the car from falling on you while you are working.

S80 auto transmission fluid change:  loosen the bolts on the sides and the front until fluid begins to flow out at the back edge

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