Yup, it's the fan. Most prone to doing it if the engine was warm when you last shut it off. Get up to about 25mph, and it should go away. Happens on my 5.2 almost every morning now that summer is here (and good AC usage, making sure that engine keeps nice and warm). You probably also notice that you have less power, which is due to the fan stealing your HP.
Ken Allgood
97 CC SLT 5.2L
>
> From: "Craig Rash" <CRash@infosysinc.com>
> Date: 2003/06/19 Thu PM 12:30:21 EDT
> To: <dakota-truck@dakota-truck.net>
> Subject: DML: Nice Roar
>
>
> I've got the 3.9 in my truck...
> After I startup the truck (or even if it's been idling for several
> minutes) it has a real nice roar to it. After a few minutes the roar
> goes away. I'm sure someone else has noticed this and knows exactly
> what it is. So I figured I'd ask.
>
> Craig Rash
> -------------
> 2000 Dakota Sport
> ClubCab
> Black
> 3.9 w/FABM
> JVC 12CD changer w/head unit
>
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