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Message: <blockquote data-quote="Brennb" data-source="post: 30613" data-attributes="member: 6375"><p>I'm having a similar issue with my 18 awd. whine/grinding in fwd, goes away in awd. Only does it in temperatures below freezing. My thought is the transfer case shift control motor. If I drive far enough in awd, and it heats up the gear oil, or I guess just the transfer case, it will lock into fwd without the noise. Sometimes when I shift into AWD (when it's freezing), I'll get a clunk as the axle engages. It's been below freezing here for 2 months, with lots of snow. I'm using a lot of fuel, lol. A break coming this week with temps in the 30's, so I plan to get underneath and check the connectors, and change the fluid. The motor (and connectors) appear to be above the fill plug, So I hope there is enough access to check.</p></blockquote><p></p>