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Do you have an automatic transmission leak that, no matter how much searching, you just can't find? Well, put on your Sherlock Holmes hat and check your dipstick tube for cracks or a missing or broken O-ring. The most likely spot the dipstick tube will crack is at the O-ring indention. You may also check that your leak is not coming from the top of the dipstick tube since some newer models also have seals at the top (mostly to keep dirt out, but check anyway).

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