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Message: <blockquote data-quote="Larry Holmes" data-source="post: 1052595" data-attributes="member: 73179"><p>Welcome, presuming you have the 4L SOHC engine and 5r55e transmission you can plan to replace the timing chain tensioners soon. Use only OEM parts for this and it took me about a half day because I removed the right fender skirt to access the lower one. There are some good YouTube videos on the process. While it is apart for the left or top tensioner you should replace the plastic thermostat housing with a metal one because of a trend to crack and leak. Here RockAuto dot com is your friend. The transmission is sensitive and quirky so dropping the pan to change the fluid unless you have a problem is not recommended by the ST practitioners on this site. I’m just an enthusiast so when my trans started slipping I had a dealership service it successfully. Since the fluid looks good I would leave it alone. One of the best ways of refreshing the fluid I have seen recommended here is to incrementally draw a quart or so from the filler tube and replace the same amount over a period of time and miles until you know that all the fluid is new, red color. At 165 thousand miles I have yet to service the differentials or transfer case but that’s next on the list. Good luck with your new to you Sport Trac.</p></blockquote><p></p>