For several years now our 08 Expedition makes a scraping noise when in midst of turn. Happens especially when load in car but not always. Source is underneath and to the rear.Trusted mechanic took it out, didn't hear anything. Car also sometimes bottoms out when loaded.
Any advice appreciated.
_______________________________________
NRA Life Member Member Isaac Walton League
I wouldn't let anyone do to me what I've done to myself
Posts: 1513 | Location: NoVa | Registered: March 14, 2009
When my car did it, it was a coil spring at the rear touching the exhaust when the body shifted under load in a turn. I found it by sticking a rear wheel up on the curb so the body shifted over a touch.
Replaced an exhaust mount and the noise vanished.
Posts: 2763 | Location: Lake Country, Minnesota | Registered: September 06, 2019
Look for a heat shield near the drive shaft. That's what was making the noise you describe on our vehicle. It only made contact when turning and made a rubbing shush shush shush sound. Bent it away by a couple of inches and no more noise.
You’re a lying dog-faced pony soldier
Posts: 30001 | Location: Norris Lake, TN | Registered: May 07, 2008
Wild ass guess since it happened to me: could it be worn shocks and as you turn, the tires are scraping the wheel well?
"It did not really matter what we expected from life, but rather what life expected from us. We needed to stop asking about the meaning of life, and instead to think of ourselves as those who were being questioned by life – daily and hourly. Our answer must consist not in talk and meditation, but in right action and in right conduct. Life ultimately means taking the responsibility to find the right answer to its problems and to fulfill the tasks which it constantly sets for each individual." Viktor Frankl, Man's Search for Meaning, 1946.
Posts: 20260 | Location: The Free State of Arizona - Ditat Deus | Registered: March 24, 2011
Originally posted by darthfuster: Look for a heat shield near the drive shaft. That's what was making the noise you describe on our vehicle. It only made contact when turning and made a rubbing shush shush shush sound. Bent it away by a couple of inches and no more noise.
What darthfuster said without doubt.
Posts: 1040 | Location: Central Ohio | Registered: January 05, 2018
When I had a scraping sound it turned out that it was a tree branch that I had run over while backing out of the garage. In my defense I was driving a 1986 Olds Cutlass Supreme so no back up camera to alert me to something lying out of sight.
I've stopped counting.
Posts: 5783 | Location: Michigan | Registered: November 07, 2008
If your Expedition has a limited slip rear axle, chances are high that the limited slip clutch packs and lubricant have degraded over time. In a turn, the clutch pack (plates coated with a high friction paper interleaved with plates of plain steel) rotate, and the friction plates rotate at a different speed than the steel plates. IF the plates and lubricant are degraded, you can create various forms of noise, as they slide against each other.
There were many many many Explorers and Expeditions with limited slip noise complaints. The noise is only created in turns. The plates slide against each other only in turns.
A potential fix, but not a guaranteed fix, is to add friction modifier M2C118A into the axle through its fill hole. Another potential fix is a lubricant replacement, again with M2C118A.
------- Trying to simplify my life...
Posts: 5271 | Location: Commonwealth of Virginia | Registered: January 15, 2007
Another vote for a heat shield that has come loose. I just had this happen on my work truck after 235,000 miles. Over top of the driveshaft, middle of the vehicle. Made the same type of sound you described.
Posts: 3882 | Location: WV | Registered: January 30, 2010
