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Hmmm... Rough guess on price to get one replaced? Would I best to try a fluid change first?

I did a fluid flush roughly 30k ago, that thought had crossed my mind though. I've tried to clear the codes a few times but no luck there

This is hard to explain but... 2006 Explorer Eddie Bauer 4.0 AWD When the truck is cold it doesnt do it but it does when warmed up after driving for a few minutes. When its around 1500-2200 RPM in any gear and you give it just enough throttle to drive at a steady speed it will start...

Update... Dealer had no idea what it was. Mechanics says "it's normal on the 4.0"..... Jesus, really? Would you sell a car that vibrated like that? And tell people it's normal. They ran their fuel system cleaner through it. Didn't help. I brought it home swapped out the harmonic...

Exactly what mine did. The thermostat was in 2 pieces when I pulled it out....

Mine did this when the thermostat started to fail.

If it means anything.. My gas mileage went up a little over 1 mpg on the highway after these parts lol... Still missing /shaking at idle up to roughly 1700 rpm

Here's the tach after the idle reset... Not sure if you can here the miss in the video or not... http://youtu.be/FyD0JqdBYfg And one of the engine... : http://youtu.be/WL35LOItCiU

Check. Got it done. Still got the vibration. Wish this thing would show some more codes! The harmonic balancer appears to be in good condition though.

Aftermarket maf but it cleared the code that the factory one was showing.

Sea foam in the gas. Not sure I coukd ever talk myself into running it through the oil

112,000.... All the plugs looked good. The wires have 0 corrosion in either end. Checked the plug to the coil pack, that's all good. I guess I just thought if it was anything to do with spark it would be noticeable even with the slightest bit of throttle, but this completely disappears...

Bump this up

And that's how mine was till recently... Ive read about possible harmonic balancer problems... Any insight?

I understand the rough idle part but I mean it just started noticeably shaking. No explorer would idle like this and be considered normal

I read and read posts on here and got a bunch of great suggestions. Tried them all.... None worked lol 06 Explorer 4.0. At 650 RPM it idles rough. You can feel the whole vehicle shake lightly and you can see the engine shaking too.... But when you drive it, it runs perfectly fine above...