Q: Heavy transmission leak.

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My transmission fluid is leaking heavily and appears to be dripping down from the top.

The transmission needs to be inspected to determine the source of the leak. If the leak source is not obviously identified, Nissan has a TSB out NTB09-140 which discusses the proper diagnosis using a UV dye to locate hard to spot leaks. You may want to enlist the help of a mechanic, like one from YourMechanic, who has the equipment and experience to locate the leak source and recommend the correct repair.

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