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Old 12-25-2012, 08:38 PM   #1
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Metallic grind

So wanting to find this metallic grind i have, its hard to explain its like metallic grinding for an instant as you pass thru certain RPM bands...for instance when the car is cold, and I hit 3k rpm it has a quick instant metallic grind that you hear for .5 sec as your passing over 3k when cold...any ideas? I've heard of a few other people having a similar type problem but wanted to explain my exact situation. Thanks guys....also at WOT I hear a slight rattle when my window is open that sounds like is coming from the front drivers tire area, could this be clutch chatter or rattle? TOB rattle (squeaks a bit now but that's oh so very common on these mustangs).
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Old 12-26-2012, 10:08 AM   #2
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I was gonna say if it was towards the rear it'd be your catback. Just for future I know this ain't your problem now but it might start rattling. But hope someone else chimes in
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Old 12-26-2012, 11:22 AM   #3
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I was gonna say if it was towards the rear it'd be your catback. Just for future I know this ain't your problem now but it might start rattling. But hope someone else chimes in
Definitely toward the front of the car, thanks 1low!
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Old 12-27-2012, 08:15 AM   #4
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Bump bump bump a bump a bump bump
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Old 12-27-2012, 08:31 AM   #5
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Does it do it while in gear or while just in neutral?
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Old 12-27-2012, 09:52 AM   #6
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Does it do it while in gear or while just in neutral?
In gear only
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Old 12-27-2012, 11:54 AM   #7
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Could be a synchro goin bad does it do it in all gears or one in specific
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o/r x-pipe flow master 40 series dump downs, cai/ram intake, 75mm c&l throttle body and plenum, pi heads and intake swap, msd wires, stock gears, untuned at the moment, no dyno numbers for now.
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Old 12-27-2012, 03:53 PM   #8
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Could be a synchro goin bad does it do it in all gears or one in specific
All gears..only hear it for that split second when your passing right over 3k rpm when the car is NOT up to temp.
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Old 12-27-2012, 03:59 PM   #9
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Is the tranny fluid within levels?
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Old 12-27-2012, 05:39 PM   #10
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Is the tranny fluid within levels?
Yes sir....thought that was the problem, changed my tranny fluid to what tremec recommends 3.2 qts Mobil 1 synthetic atf...didn't help..did smooth shifting but noise is still there

---------- Post added at 06:39 PM ---------- Previous post was at 06:38 PM ----------

I hate it so much I refuse to drive it cold unless I have to, I will start it up and let it warm for 5-10 now before driving it cuz the noise freaks me the F out lol
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Old 12-27-2012, 05:50 PM   #11
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Hope you figure it out! I would let it warm up till you figure it out
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Old 12-28-2012, 10:03 AM   #12
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Hope you figure it out! I would let it warm up till you figure it out
Appreciate it 1low..me too lol it doesn't sound like a horrible/bad grind, it's almost a jolt of a metallic scrapping type noise..hopefully it's just an exhaust hanger or something and when it gets hot it expands thus stopping the noise, it's my best guesstimate as to what it is but I am no mechanic.
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Old 12-28-2012, 10:25 AM   #13
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Appreciate it 1low..me too lol it doesn't sound like a horrible/bad grind, it's almost a jolt of a metallic scrapping type noise..hopefully it's just an exhaust hanger or something and when it gets hot it expands thus stopping the noise, it's my best guesstimate as to what it is but I am no mechanic.
Could be....i would check under the car for the exhaust. If u can take a vid of when it happens maybe we could figure it out
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Old 12-28-2012, 11:26 AM   #14
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Could be....i would check under the car for the exhaust. If u can take a vid of when it happens maybe we could figure it out
Very hard cuz it's not an extremely loud noise, it's a tad quiet video camera may not pick it up
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Old 12-28-2012, 02:30 PM   #15
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Get under it and have somebody rev it up
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Old 12-28-2012, 02:42 PM   #16
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Get under it and have somebody rev it up
Only does it when driving in gear..when it's cold and I can hear it in all gears only for a split second when crossing over 3k rpm...seems to me like it must be something underneath touch/rubbing or something, and when it heats up it causes it to expand thus stopping the noise..
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Old 12-29-2012, 01:07 PM   #17
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Bump
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Old 12-29-2012, 11:29 PM   #18
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Anyone
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Old 12-30-2012, 04:17 PM   #19
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Have u tried to keep it at the rpm at which it grinds on fpr a while. See if keeping it at where u hear the grind on that rpm is constant or not. It may be something rubbing like exhaust or not.
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Old 12-30-2012, 04:27 PM   #20
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Have u tried to keep it at the rpm at which it grinds on fpr a while. See if keeping it at where u hear the grind on that rpm is constant or not. It may be something rubbing like exhaust or not.
Ill try that tonight..pretty sure I can
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Old 12-31-2012, 01:29 PM   #21
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How old is your clutch and everything?
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Old 12-31-2012, 02:05 PM   #22
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How old is your clutch and everything?
Was told it had a new ford racing clutch and new tremec 3650 from the dealer when I bought it in march..my mechanic did verify the new tranny but never asked him about the clutch, he said the clutch did do its job nicely tho, I do have a slight TOB squeak at idle only sometime and my mechanic said its nothing to worry about and it will def give me wayyyyy more warning before it goes out, it's a very slight chirp chirp chip..told my mechanic about the cold metallic grind but he said he couldn't replicate the problem, I'm guess cuz he never let it sit long enough to get fully cold
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Old 12-31-2012, 02:23 PM   #23
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The chirp needs to be adjusted don't ignore it because from what I understand that's ur TOB lightly sitting on ur clutch it's gonna wear out before you know it. If clutch isn't adjusted right then that's where the grind is coming from because the clutch isn't adjusted right. That's will make for gears to get harder to shift into and all... This is the result of a "mechanic" not replacing old worn out parts and improper install also not being adjusted right. Question? Does ur clutch pedal sit higher than ur brake? If so then adjust ur clutch. There is a lot if people have this problem and there is advice and tips on adjusting it. Although it is limited on adjustment with stock you can replace it with aftermarket. If you still do not believe this is ur problem then sorry I was no help and yet this may not be the problem it just sounds to familiar to me...
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Old 01-02-2013, 03:03 PM   #24
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Nothing to do about this thread but njstanger delete some of you MESSAGEs lmao
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Old 01-02-2013, 04:42 PM   #25
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Nothing to do about this thread but njstanger delete some of you MESSAGEs lmao
Lmao I was wondering why no reply I'm doing it now hahaha
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Old 01-02-2013, 05:21 PM   #26
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I have the same problem! Have had it for a while no hasn't gotten worse. I do know that one of my exhaust clips/brackets is loose but i doubt that's it
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Old 01-02-2013, 05:50 PM   #27
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I have the same problem! Have had it for a while no hasn't gotten worse. I do know that one of my exhaust clips/brackets is loose but i doubt that's it
I'm thinkin something in the clutch brotha, I'm just gonna stick it out and keep it under 3k rpm when cold till I eventually replace the whole clutch assembly..sucks lol
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Old 01-03-2013, 06:32 PM   #28
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Mine's been doing this since I got it. Around 2700 RPM I hear a "shiiink!" Of metal-on-metal and it goes away. Its something in the clutch/flywheel. It's further up than the trans, as i've driven without my shifter boot and insulator on to listen to it(never do this by the way, our trans are really noisy and it makes you feel like you just browsed WebMD for cars and diagnosed yourself with a bajillion problems). Never gets louder, trans fluid is good and clean, never effects anything just makes that sound.
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Old 01-03-2013, 07:54 PM   #29
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Use chassis ears to verify where the noise is coming from. Maybe check for crank walk. Noise concerns are very difficult to diagnose over the Internet. Lol
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