I just picked up a 06 Ranger with the 2.3/5-speed and only 50 miles. This would be my first break in i've had to do. My current plan on the oil would be the 1st at 1k and the 2nd at 3k (freebie at the dealer) and 5k on out. All with 5/20 btw. I'm trying to decide if it would be worth it if I dumped the tranny, diff fluid at the 5k mark. I'm planning on keeping the truck for quite a while.. but i've said that in the past so i'd better hold my tongue. The antifreeze would be done on yearly schedules so I won't do that till this time next year. What do you guys think? I know of many rangers with the original tranny/diff fills with over 100k.. so maybe I'm worrying to much. But then again I do frequent here I must of picked up the disease