I just purchased a 2006 Durango 4.7 SLT with 170,000 miles, running strong. It had a rebuilt transmission installed at 128,000 so I am guessing it's time to change the fluid, Spark plugs were at 98,000 miles, those are overdue.

Is there a post on how to change the trans fluid and filter if any?

Also, any recommendation for a nice burning spark plug that lasts longer than 30,000 miles.

Thanks in Advance