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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

New vibration at certain RPMs

  • Thread starter Thread starter jayrw
  • Start date Start date Sep 10, 2008

jayrw

Member
Sep 2, 2007
156
0
17
Clovis, California.
Sep 10, 2008
#1
  • Sep 10, 2008
  • #1
Lately I can feel a vibration on the floor and gas pedal when the rpm's are between 1500 - 1900 rpm, its most noticeable when shifting from 1st to 2nd, just as 2nd gear starts to pull I feel the vibration, the lower the rpm's when I shift from 1st to 2nd the more its noticeable , Ive had the car for nearly a year now and never had this problem before, Any ideas appreciated.

Car is a 2000 GT w/ 68k miles, all stock except for a centerforce dual friction clutch w/ 1,100 miles.

Thanks.
 

jayrw

Member
Sep 2, 2007
156
0
17
Clovis, California.
Sep 16, 2008
#2
  • Sep 16, 2008
  • #2
Nobody? Im sure ill end up taking it to a shop soon but im just curious what others thought...
 

Dave0803

Member
Mar 3, 2003
236
0
17
Leonardtown, MD
Dec 8, 2011
#3
  • Dec 8, 2011
  • #3
I have the same problem with my 00 GT. Have you found a fix for this yet? I thought the clutch too but have not been able to look at it yet.
 

N8Dogg98

15 Year Member
Apr 4, 2005
3,872
238
184
MN
Dec 8, 2011
#4
  • Dec 8, 2011
  • #4
I'd suspect the clutch as well. After replacing my stock clutch with a ram clutch I began to get this vibration between 1500-1900 rpm in any gear. I notice it most in 3rd though...

sent from the bathroom via tapatalk
 

Dave0803

Member
Mar 3, 2003
236
0
17
Leonardtown, MD
Dec 8, 2011
#5
  • Dec 8, 2011
  • #5
We're you ever able to find a fix for it? It's driving me nuts.


---
I am here: http://maps.google.com/maps?ll=38.285503,-76.653289
 

txredgt

10 Year Member
Oct 26, 2009
1,343
33
69
Dec 8, 2011
#6
  • Dec 8, 2011
  • #6
Clutch or motor mounts are the usual suspects. If those have never been changed I would say its time.
 
T

Travis99

New Member
Jan 10, 2012
3
0
1
Jan 10, 2012
#7
  • Jan 10, 2012
  • #7
I have a 99 GT with 74k with stock clutch. Im getting that same vibration on floor and pedal at 2000 rpm in every gear. Car has mac off road x-pipe/cat back. I figured out that at certain rpm the engine is causing the x-pipe to flex and chatter against the floor at the bottom of the firewall next to trans. I parked the car for winter and have not yet made any changes yet. May be something to check out since mid pipe stock or modded would have been removed to drop trans.
 

AZmustang98

Member
Oct 19, 2011
373
17
19
Flagstaff, Arizona
Jan 10, 2012
#8
  • Jan 10, 2012
  • #8
Transmission crossmember mount? Totally different era of vehicle but my 64 Ranchero did the same thing and it turned out to be an almost 50 year old transmission mount.
 

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
Jan 11, 2012
#9
  • Jan 11, 2012
  • #9
Check the u-joints.
 

joshjwc9

Active Member
Jun 12, 2006
1,095
17
39
Palm Harbor, FL
Jan 11, 2012
#10
  • Jan 11, 2012
  • #10
COramprat said:
Check the u-joints.
Click to expand...
This, replace them if you cannot remember when they were done last, if at all. Cheap insurance. Motor mounts are inexpensive as well. Jack the car up and look for any rubbing of the exhaust on the frame/underbody.

Trying adjusting the clutch by pulling up on the pedal and pushing the pedal in several times if you have stock cable/quadrant setup.
 

Dave0803

Member
Mar 3, 2003
236
0
17
Leonardtown, MD
Jan 14, 2012
#11
  • Jan 14, 2012
  • #11
I've replaced both motor mounts and the trams mount. I convinced mine is the clutch and/or flywheel. It happens between 1000-1500 RPM and you can feel it in or out of gear.
 

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
Jan 16, 2012
#12
  • Jan 16, 2012
  • #12
Dave0803 said:
I've replaced both motor mounts and the trams mount. I convinced mine is the clutch and/or flywheel. It happens between 1000-1500 RPM and you can feel it in or out of gear.
Click to expand...
While rolling or sitting still?
 

Dave0803

Member
Mar 3, 2003
236
0
17
Leonardtown, MD
Jan 17, 2012
#13
  • Jan 17, 2012
  • #13
both. I feel it more when sitting still but i do still feel it when the car is moving. I think I feel it less when I'm moving only because there are other vibrations that kinda cancel it out a little.
 
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