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The transfer case in any 4wd car or truck should not be ignored when it comes to oil changes. In the ford 150 this one in the video being a 2006 is actually really easy to change and should take no more than 20 minutes or 1 beer to do.
the process is simple just remove the fill plug first then remove the drain plug and collect used oil in a container. once fluid is drained install drain plug and fill with proper fluid until fluid comes out of fill plug. reinsert fill plug and your done.