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thanks
I am hoping someone can help me figure out what sounds like a loud pop in the exhaust when you start the expedition and let it warm up. Sounds like expansion and contraction pops?????
It is towards the rear of the car.
alwaysford2 helped me so much when the heater in the rear stopped. I am hoping someone can help me with this annoying noise.
Thanks
I have a 2003 Expedition Eddie Bauer with AWD/4WD with the 5.4 engine. It has 60,000 miles on it and has ran great for a long time.
The other day it started making a sound that I have never heard a car make before. When you are driving down the road when you hit about 25 mph a pronounced SQUEALING or SCREAMING type of noise comes from what seems to be the FRONT end, DRIVERS SIDE tire area. It is a continuous noise and will not stop unless I slow down to less than 5 mph or stop. As soon as I accelerate, it's there again. It is EASILY heard by passing cars too.
My step dad and I have been trying to figure it out. He is VERY good mechanically. The vehicle shifts into other gears smoothly, revving the engine doesn't make a bit of difference in the noise. I have switched it into all the different 4wd modes with no change at all. I have switched on and off everything I can in the interior to see if it makes any difference in the sound and it does not. Today we replaced the front brake shoes and that didn't change anything. It was due anyway.
It doesn't really sound like a grinding, just a high pitched squeal. My Step dad said it reminds him of blowing up a balloon and then pinching the rim of the balloon and letting the air out. You know that sound right? Well that's what I have whenever I am over 15mph.
There are no other strange noises. The motor revs and runs great and sounds great. Neither of us can detect any problems what so ever with the tranny. It simply sounds like there is something right behind the front end drivers side wheel that is causing the horrid noise.
Can anyone help us figure out what is going on here? Any similar experiences with yours?
Thanks for your help and time.
Nalajr
To verify you could jack up the front driver side like you were going to change the tire. Spin the tire and you should hear and feel if the bearings are bad.
anybody can help me on that?
I hope this isn't U-joints I just spent 650 a few months ago to get them fixed.
My truck has been doing this since I changed the brake pads.
did you ever get an answer to this problem? I'm having the same issue.
I am having the same problem and i haven't towed anything.
I would be very interested in the answers you receive. Could you send them to me.
I owe a 04 expedition.
Thanks
Nedra
Jun 28, 2010 (1:43 pm)
I had the rattling sound from the wheel area too. I took it in to the dealer and they rebuilt part of the transmission which did not solve the problem. The service manager took an interest in the problem and figured it out without lifting the hood. Seems that there is a vacuum valve that controls the 4WD hubs and when they get old they start to leak and the hubs are trying to engage at high speed which causes all the noise. I've got a 2005 Expo with about 50M miles on it. Until now I had never had a problem with it. Once they put the new valve in the noise went away and hasn't come back in a month.
PS. The truck now has 90,000 miles on it and the rattle has never come back.
Finally had the time today to act on a hunch -- I solved this by making sure that the tube running from the air filter housing to the hard plastic inlet at the throttle body was pulled taught against the filter housing before cinching the large hose clamp. My clues were 1) the RPM jump that accompanied the buzzing noise -- that seemed to me (coupled with where the sound seemed to be coming from) to point to the inlet tract; 2) sometimes after checking or replacing the air filter, the resonance would be reduced for a couple of days. I took it for a very brief drive with the air filter housing top loose today and could hear a change in tone when the resonance was taking place as compared to with the filter housing in place.
There are several resonance chambers built into the inlet tract, so apparently having the right stiffness and/or geometry of the assembly is important.
Hope this helps someone else someday.
Where did you get your tires? Hate to say it, but I've had rotten luck with places like Walmart, or even discount tire places. My theory is that they get 'seconds', with hard spots in the rubber etc.
Also, tire balancing is an art, especially with big, heavy tires. The shop should index the tire to the wheel (find th high and low spots on each and set them up so they cancel out.) If it seems like you're not getting anywhere with one shop, try another. I finally found a shop that was able to make a huge difference with my Expy -- The local Ford dealer had no clue, nor did the Big-O tire shop. A road-force balancing machine may help.
Driveshaft issues will be different, much smaller in amplitude but higher in frequency, 2000 hz or so, same as the engine RPMs in 4th (the six-speed in the Expy actually doesn't have any gear with a direct 1:1 ratio, but close enough) and not tending to come and go. If that's it, either replace or balance (you can try indexing it as well by matching the high spot of the driveshaft with the low spot on the engine and/or diff flanges.
Very frustrating thing, I know!
My acceleration is very poor, there is a strange knocking in the rear of the vehicle. overall power is almost non existent. and i have no idea where to even begin when trying to fix the situation. can any one please help me with this one.
The intermittent different sounds are the tooth getting kicked up by the gears and scraping on the cover of the rear diff. Pull the cover on the rear diff... and I will bet everything will make sense quick.
I realize this is probably way late for the poster... but maybe it will help some one else.