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I changed the oil and it hasn't happened since. Maybe I'm being too paranoid here. Like I said it only happened once on start up for 1-2 seconds....just wondering if its really a sign of wear or just one time thing. Can I tell anything from a one time rattle? lol Is the 4.6l suppossed to...

A friction modifier is not going to make any difference to an open differential is it?

For the first time since I owned the vehicle (been a couple of years). I noticed a chain rattle. It was only 1-2 second on start up. The weather was warm and the oil level was lower than it should be (was just before an oil change, its has a slow oil leak from a small hairline crack on the...

Anyone have any luck with changing the differential fluid to something 'heavier' or 'thicker'? Like Lucas Oil Stabilizer or Redline Shockproof Heavy?

wearing your seatbelt??

I was just reading the service manual (this was for a 2003 explorer and I do have a 2004, but I'm guessing the procedure is exactly the same) and noticed that it said on it drain and fill procedure for the 'rear axle', that after you fill it to the bottom of the fill plug. You then take of...

That wheel bearing hum you were getting all the time right, not just on acceleration? Also you're getting it on turns right? I'm getting this noise ONLY when on the gas pedal. If the foot is off, the growl/whine goes away. I will double check my bearings though just in case.

Hi Everyone, I'm getting noises coming from the rear of a 2004, almost positive it is the rear differential but I guess it's possible it's coming from somewhere else in the back. It has almost 100k miles on it right now and probably never taken off road. It has light-moderate whirrs...