Ford, Lincoln, Mercury Tech Automotive Related Topics Only !

Vibration at 4k

Thread Tools
 
Old Mar 9, 2006 | 12:56 PM
  #1 (permalink)  
SGear's Avatar
Thread Starter
two hairy fl palms
 
Joined: Aug 2005
Posts: 89
Likes: 0
Unhappy Vibration at 4k

I had a wicked vibration before replacing the harmonic balancer, now all that has gone away except at the 4,000 RPM mark and it doesn't matter what gear I'm in. Only at 4k it vibrates, when rpms increase or decrease away from 4k it goes away.

....anyone know what's up ?
__________________
Don't you wish there were a knob on the TV to turn up the intelligence?! There's one marked 'Brightness' but it doesn't work.



www.cnhosts.net
www.bangstang.net
Reply
Old Mar 9, 2006 | 01:36 PM
  #2 (permalink)  
cochese's Avatar
Chucking up the Dueces
 
Joined: Jun 2002
Posts: 8,370
Likes: 1
Default

drive shaft may be out of balence
__________________
Caputo Motorsports-Shawn Caputo
Induction Performance.com
PTC torque converter
Aerospace Components
ProFab Performance
R.I automotive
C.R.T transmisions
5.13@145mph
Reply
Old Mar 9, 2006 | 01:55 PM
  #3 (permalink)  
FoxBodyBlur's Avatar
Insert fancy title here.
 
Joined: Dec 2005
Posts: 332
Likes: 0
Default

might be motor mounts. but idk why it would only be at a certain rpm tho
Reply
Old Mar 9, 2006 | 02:04 PM
  #4 (permalink)  
ODB's Avatar
ODB
S.Y.L.O.
 
Joined: Jan 2004
Posts: 16,169
Likes: 0
Default

Originally Posted by cochese
drive shaft may be out of balence
+1
Reply
Old Mar 9, 2006 | 03:26 PM
  #6 (permalink)  
FoxBodyBlur's Avatar
Insert fancy title here.
 
Joined: Dec 2005
Posts: 332
Likes: 0
Default

does the motor rock a lot when u go to start it?
Reply
Old Mar 9, 2006 | 05:43 PM
  #7 (permalink)  
SGear's Avatar
Thread Starter
two hairy fl palms
 
Joined: Aug 2005
Posts: 89
Likes: 0
Default

Originally Posted by FoxBodyBlur
does the motor rock a lot when u go to start it?
I don't know but I will check that in the morning and let you know.

The motor mounts are in good shape, one is brand new the other is original.
__________________
Don't you wish there were a knob on the TV to turn up the intelligence?! There's one marked 'Brightness' but it doesn't work.



www.cnhosts.net
www.bangstang.net
Reply
Old Mar 9, 2006 | 05:55 PM
  #8 (permalink)  
FoxBodyBlur's Avatar
Insert fancy title here.
 
Joined: Dec 2005
Posts: 332
Likes: 0
Default

if it's an original from 1990 u might need to replace it lol

Last edited by FoxBodyBlur; Mar 9, 2006 at 06:00 PM.
Reply
Old Mar 9, 2006 | 06:50 PM
  #9 (permalink)  
Strokd85's Avatar
Daddy-O
 
Joined: Aug 2001
Posts: 3,300
Likes: 0
Default

does it do it while in neutral?
__________________
I am your penalty.....
Reply



All times are GMT -8. The time now is 10:39 PM.