SQUEAKY! My Expedition Squeaks likes crazy! Every little bump, turn, anything! Everyone call hear me coming from a mile away. It squeaks from all over, it's not an isolated area. I can stand on the side step and jump a little and it squeaks. Someone told me they un-squeaked theirs by adding a little gasoline to used transmission fluid and spraying all of the rubber parts underneath. Is this a valid, temp fix?

posible you need new ball joins and control arms

Worn control arm bushings, worn stabilizer bar end links or bushings. Worn strut mounts. Worn ball joints, worn tie rod ends (less likely)

The last thing you should do is blindly throw money at it without a proper diagnosis, to regretfully learn the problem still exists. Squeaks can be as simple as a worn shock mount, belt slippage, weather stripping in need of lubricant. or a myriad of other things that cost far less than a suspension overhaul.

If it is your shocks/struts, look for the outside of the shock cylinder to appear wet/oily. Hydraulic fluid leaks are proof your shocks/struts need replacing (best to replace all 4, but at the very least the front or rears should be replaced in pairs), and putting it off can certainly lead to a domino effect of failed components (fragged ball joints or tie rod ends, shredded bushings, excessive tire wear, etc..)

If you have a reliable mechanic, that's where I would head. However, if you are more of a DIY'er, grab a friend and head out to a vacant lot with some bumps where you can try and reproduce the problem. While one of you drives slowly, CAREFULLY, the other walk along side and try to pinpoint the source of the squeak (front driver side, rear passenger side, engine compartment, trunk, wherever). Note the speed and direction of turn when the squeak(s) appear, forward AND reverse? Does it happen when air temp is cold/hot, all the time? This is valuable info to relay to a mechanic.

The point is, suspension systems can be wildly complex and sensitive (as any BMW owner can testify), or fairly simple (think mid-70's leaf-sprung trucks).

Another factor is how many miles have you logged on your Kia? If you've hit 80k miles or more, this is when you can expect to start replacing many components that have reached the end of their service life.

With a little more info, a more precise diagnosis can be given.

check the backing plate to the disc brakes, if its been bent even slightly your gonna hear that same noise,, if it is that < Just bend it back out a little

You mean it sounds like the school bus pulling up?? It is the pads, some of the new organic pads squeak like crazy, my motorcycle squeaks like a school bus, I changed the pads 3 times before I found one that didn't squeak. You can go out and get them now, or just wait till it's do, Get a different pad, get the old cheap ones that don't turn your wheels brown with soybeans or whatever is in them. I tried the good ones and the cheap ones, I can't tell any difference in stopping performance, they both work, one might last longer, be environmentally safe, but we are talking brakes here, not rocket ships. Check it out, Hope this helps.

Squeaky when you go over bumps or on turning? If it only squeaks when you turn it is probably ball joints or tie rod ends and if it is when you go over bumps it could be your rubber bushings for your control arms.

that model year had issues with ball joints i have replaced lots for the squeeking

I had the same problem with my 01 suburban. It was the struts. Replaced them and no more squeaks!!

sometimes if they get a glaze effect they will glaze up causing squeaks. Are they very shiny? if so they are glazed. Also are they factory pads or aftermarket do you know? Metallic pads almost always will give off a little squeak. If you know how to take off wheel and caliper you can remove the rotors and bring them into parts store and they can turn them real quick for you for about 20-30 for both of them. Just do the fronts. if you say your pads are fine leave them alone and just reuse them. This will help renew the brakes alittle but when you do replace pads in future always replace rotors as well dont turn them with new pads. and if you can, go with ceramic pads. less likely to squeal but just for a few hundred miles untill break in is over.

Check your power steering fluid level