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Ranger Roger
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No sound
P. A. Schilke
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Hi NY,
More data please. MODS? Wheels replaced? not enough info, To me it sounds like a loose road wheel... Since this is repeatable, it is a simple matter to locate the source of the noise. Time for a dealer visit since you are under warranty. This stick/slip sound during what we call dry parking is easy to replicated at the dealer where trained tech can help. Not knowing what you have done or not done is helpful for diagnostics. What you are showing and hearing is like going to the doctor and telling them "I have a pain in my body" Where do you think this sound is originating? Maybe others can recognize this sound but I can only guess on experience and could be way off base.
I like to help where I can but I need more info.
Best,
Phil Schilke
Ranger Vehicle Engineering
Ford Motor Co Retired
P. A. Schilke
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Hi NY,
Who did the lift? If it was a DYI...check your work. If some shop did it, take it back to them...something is likely loose.
Best,
Phil Schilke
Ranger Vehicle Engineering
Ford Motor Co. Retired
P. A. Schilke
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Hi NY,
Maybe, but depending on the kit etc. Something may have loosened up from poor design of the kit using hardware grade fasteners. ( do not get me started on SEMA show aftermarket junk) or improper install. You might have a bit more problem with the dealer as the vehicle is modified if they did not do the install which you have not indicated who did the install. Please just take this as my guess as this is not a normal sound for a production vehicle unless something went wrong on the assembly line. In this day there are few air tools on line as most line workers use electric tools that control torque much better. Also you still did not indicate where you think the noise is originating. Left Front? Middle front etc. Something is wrong but should be easy to radar in on with simple ears or a mechanic stethoscope with the metal probe removed as it is very directional.
Wish I could help more but your reluctance to provide information is limiting diagnostic help.
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Phil Schilke
Ranger Vehicle Engineering
Ford Motor Co. Retired
I_smell_like_diesel
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I would check the lower control arm eccentric bolts first. Sounds like you have something in the front suspension that is "kinda" tight but not tight enough..... causing a creaking/popping noise.
It helps it you have a friend that's not scared to lay under the car, while you do what you're recording. Placing you hand on suspect sports can narrow things down pretty quick.
It helps it you have a friend that's not scared to lay under the car, while you do what you're recording. Placing you hand on suspect sports can narrow things down pretty quick.
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Mokume
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I'm assuming the wheel/tires are in contact with the pavement in your video, thereby placing a load on all steering/suspension components. I'd find a helper to cycle the steering wheel as you use some sort of listening device to pinpoint it. A stethoscope is ideal, but any long metal object (such as a piece of pipe) which you can hold near your ear will work
Have you tried replicating the noise with the wheels off the ground?
Have you tried replicating the noise with the wheels off the ground?
Mokume
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P. A. Schilke
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Hi NY,
I have a back on what we call dry parking which was what you were doing in your video. This is hell on tires to grind them into the flat spots in short order.
We have requirement to do a cyclic dry park on several vehicle of new chassis design. This is a very difficult procedure to park on concrete and cycle the truck for 1000 cycles. Not something even a test track driver could do. You get arm weary in a few hundred cycles.
So we had a production problem on Explorer where the intermediate shaft connected to the steering gear. There is a coupling that we call the rag joint that flexes to provide damping and alignment to the intermediate shaft and the steering gear. The line worker told his foreman that he heard a crack when tightening the clamp of the rag joint to the steering gear. So the vehicle was taken to the repair area and the rag joint/intermediate shaft was removed. Then another and another and another....Huston, we had a problem, so the plant went into build and park vehicles. At 75 units an hour this resulted in a critical issue. So they sent the failed shafts up to me in Design Analysis. The question to begin with was does a cracked clamp result in steering failure. So our vehicle dynamics folks got involved to answer that question. Their approach was to install a cracked shaft and dry park it. Well it turned out that this proved more difficult than they imagined so they had to trade off people to dry park, lock to lock and back...hold and lock to lock over and over again. Since time was not on our side, the Supervisor took the test vehicle back home and tired in his driveway but his arms gave out as well. Good new was that there was no loss of steering even if the cyclic requirement was not met at this time. In the mean time my engineer and I set up an automatic test in the Building 4 Test lab to test the failed shafts. I also had shafts sent to Central Labs for a fracture analysis on an asap basis. The test fixture showed no loss of steering as well, so I could at least sleep the night not worrying that we might have accidents. Central Labs reported that the crack was a result of a seam in the bar stock that the manufacturer was using. Now here it where it becomes difficult to describe... The manufacturer bought a Heat Of Steel. This is one of the giant ladle of steel that you see in pictures of steel production. This Heat was the size of a box car. Anyway when pouring the steel into a mold, there is a possibility that the steel cools to the point where then next layer does not "bond" with the layer below and results in a seam. Now if you take this Heat and draw it down to length of rod for the raw material to make these rag joint clamps, the seam follows the drawing process so the finished clamps are in reality, the parts are pre cracked! Yikes! I learned a lot on this panic.
So the good news was that no Explorer would loose steering and that we knew the cause of the problem and the manufacturer would use certified stock, we could issue a recall for units in a specific time frame to replace their intermediate shaft/rag joint.
Sometimes it can be hard to sleep at night when involved in things like this, but knowing we contained this quickly and kept the line running with no danger to the customer was a huge relief. So the Vehicle Dynamics supervisor to my knowledge never was able to shed his stupid attempt to be the He Man and finish the dry parking test in short order as needed but never completes.
Okay...enough for tonight...
Best,
Phil Schilke
Ranger Vehicle Engineering
Ford Motor Co. Retired
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