Q: How to replace a driveaxle oil seal in a Mercury Mariner?
A: Raise the rear of the vehicle and support it securely on jackstands. Place the transaxle in Neutral with the parking brake off. Block the front wheels to prevent the vehicle from rolling. Remove the wheel(s). Carefully pry out the wheel seal with a seal removal tool or a large screwdriver. Be careful not to damage or scratch the seal bore. Using a seal installer or a large deep socket as a drift, install the new wheel seal. Drive it into the bore squarely and make sure it's completely seated. Lubricate the lip of the new seal with multi-purpose grease, then install the wheel. Be careful not to damage the lip of the new seal. Check the differential lubricant level and add some, if necessary, to bring it to the appropriate level.