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The transmission fluid change is not that hard but different from other transmissions. You have 2 plugs in the pan one for drain and the other for fill. It is a closed transmission system but not $470.00 for repair. The book time is 1.5 hours. The only difference is that you have to fill from the bottom and not top because there are no transmission dipsticks. If you got 2 estimates from the Ford dealer and that big of a difference then i would goto the lower cost one because the other seems like they have no work and is charging way to much