I bought a 99 ford explorer with 88,000 miles on it about six months ago. I had the brakes replaced and oil changed as soon as I got it and it has passed inspection...a couple months later it started to make a creaking noise when I hit bumps or turned the wheel. I live in texas and the weather had heated up and the noise went away completely. Now that its starting to get cold the noise has returned full force and gotten worse. I recently took it on a four hour trip (before the noise started again) and it worked perfectly. Now I'm needing to drive it for about an hours worth of a trip and I'm scared? I heard it could flip? The noise had gotten so bad I get laughs from friends and family. What I need to know is what could it be if it went away and then came back worse? And how much will this cost to fix?