Vibration at 3500 RPM?
07-10-2007, 11:54 AM
#11
2nd Gear Member
Thread Starter
Join Date: Jun 2007
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Posts: 224
RE: Vibration at 3500 RPM?
Moose - Please keep me updated if you do in fact take it to the dealer. After some intese trail and error, it really is closer to 3200 than 3500. I never sat there and tried to figure out exactly where it occured. Anyway, it seems that it's possibly something with the exhaust rattling, maybe close to the engine before it goes to the pipes the length back - like right under and in front of the center console, behind the radio, etc.
07-10-2007, 02:26 PM
#13
6th Gear Member
Join Date: Sep 2006
Location: Gainesville, FL
Posts: 11,278
RE: Vibration at 3500 RPM?
ORIGINAL: fordfanboy
Sounds like that other guys I was talking about - THE EXHAUST HANGER. I'd almost bet money on it.
Sounds like that other guys I was talking about - THE EXHAUST HANGER. I'd almost bet money on it.
maybe i'll just remove the exhaust!
07-10-2007, 02:52 PM
#14
4th Gear Member
Join Date: May 2007
Location: Pacific Northwest, USA
Posts: 1,691
RE: Vibration at 3500 RPM?
ORIGINAL: moosestang
You're talking about the exhaust hanger on the trans cross member? I tried adjusting that by shimming the trans cross member, there was zero change. The tsb on that calls for adding hose clamps or something, which just seemed silly. maybe i'll just remove the exhaust!
ORIGINAL: fordfanboy
Sounds like that other guys I was talking about - THE EXHAUST HANGER. I'd almost bet money on it.
Sounds like that other guys I was talking about - THE EXHAUST HANGER. I'd almost bet money on it.
maybe i'll just remove the exhaust!
07-10-2007, 04:11 PM
#15
3rd Gear Member
Join Date: Jul 2006
Location: Chicago (South Loop)
Posts: 685
RE: Vibration at 3500 RPM?
ORIGINAL: fordfanboy
Oh I forgot, there was also this guy who had a similar situation at a specific RPM only. Can't remember what rpm it was but it was only that exact rpm. Anyway, after he took it to the dealership a half dozen times they finally figured out it was just the harmonics of that rpm that was rattling the exhaust hanger. He replaced the stock exhaust and never heard it again.
I forgot about that but that might be somthing interesting to you as well...
Oh I forgot, there was also this guy who had a similar situation at a specific RPM only. Can't remember what rpm it was but it was only that exact rpm. Anyway, after he took it to the dealership a half dozen times they finally figured out it was just the harmonics of that rpm that was rattling the exhaust hanger. He replaced the stock exhaust and never heard it again.
I forgot about that but that might be somthing interesting to you as well...
wondering if it's the exhaust or what. sounds like a bad rattle at 3000......hmmm
07-10-2007, 04:18 PM
#16
6th Gear Member
Join Date: Sep 2006
Location: Gainesville, FL
Posts: 11,278
RE: Vibration at 3500 RPM?
This is no rattle. It's a vibration caused by something that is spinning.
ORIGINAL: imyy4u
i have the exact same problem...but it's kinda like rattling at 3000 or so rpm. only at that rpm. i have taken it to the dealership several times and they have no idea...
wondering if it's the exhaust or what. sounds like a bad rattle at 3000......hmmm
ORIGINAL: fordfanboy
Oh I forgot, there was also this guy who had a similar situation at a specific RPM only. Can't remember what rpm it was but it was only that exact rpm. Anyway, after he took it to the dealership a half dozen times they finally figured out it was just the harmonics of that rpm that was rattling the exhaust hanger. He replaced the stock exhaust and never heard it again.
I forgot about that but that might be somthing interesting to you as well...
Oh I forgot, there was also this guy who had a similar situation at a specific RPM only. Can't remember what rpm it was but it was only that exact rpm. Anyway, after he took it to the dealership a half dozen times they finally figured out it was just the harmonics of that rpm that was rattling the exhaust hanger. He replaced the stock exhaust and never heard it again.
I forgot about that but that might be somthing interesting to you as well...
wondering if it's the exhaust or what. sounds like a bad rattle at 3000......hmmm
07-10-2007, 04:45 PM
#17
I ♥ Acer
Join Date: Aug 2006
Location:
Posts: 1,527
RE: Vibration at 3500 RPM?
Moose - I wasn't directing the hanger theory to you. I actually don't know what in the heck is your issue but I'm pretty sure it's not the hanger issue because of you describing tghe sound as 'spinning'. Some of the other chimes in this thread do sound like the hanger issue.
For those wondering what it turned out to be for this guy was the stock exhaust would rattle the hanger at a certain rpm because of a specific harmonic that occured at that specific rpm. He had taken it to the dealership many times and they went through everything over and over and finally figured it out. I don't remember if the dealership or another shop figured it out but I do know that after trying a lot of stuff, nothing made the vibration go away. He ended up buying an aftermarket exhaust and new midpipe and never heard the noise again. It was related to the stock exhaust and midpipe.
He (can't remember his name) was the only guy I have heard about this but it was described almost exactly like some of you are describing and I can't remember for sure but I think it was around the 3000 rpm range also.
For those wondering what it turned out to be for this guy was the stock exhaust would rattle the hanger at a certain rpm because of a specific harmonic that occured at that specific rpm. He had taken it to the dealership many times and they went through everything over and over and finally figured it out. I don't remember if the dealership or another shop figured it out but I do know that after trying a lot of stuff, nothing made the vibration go away. He ended up buying an aftermarket exhaust and new midpipe and never heard the noise again. It was related to the stock exhaust and midpipe.
He (can't remember his name) was the only guy I have heard about this but it was described almost exactly like some of you are describing and I can't remember for sure but I think it was around the 3000 rpm range also.
