4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

clunk????

Thread Tools
 
Search this Thread
 
Old May 25, 2007 | 11:49 PM
  #1  
Hulk99's Avatar
Hulk99
Thread Starter
3rd Gear Member
 
Joined: Sep 2006
Posts: 563
From:
Default clunk????

I just test drove a 99 cobra. It is at a dealership and has undergone an inspection. It has 66k miles on the clock and appears to be in good shape for being a 99. My only concern is that when I let off the clutch in 1st and 2nd there is a clunk noise. The dealer said it could be a heavy clutch and that his mechanics would have notified him if it was a tranny problem. Now my tranny makes some noise but what do you guys think. BTW cobras rule.
Old May 25, 2007 | 11:56 PM
  #2  
CHIC's Avatar
CHIC
1st Gear Member
 
Joined: May 2007
Posts: 121
From:
Default RE: clunk????

Personnaly, i wouldnt trust that guy at all. something isn't syncing right between the clutch and the fly or the tranny. maybe a busted pilot bearing or something. his guys wouldnt lie to him, but he shure as hell would lie to you to make a sale......those guys are slimeballs.
Old May 25, 2007 | 11:59 PM
  #3  
PWORLDSTANG's Avatar
PWORLDSTANG
4th Gear Member
 
Joined: Jul 2006
Posts: 1,399
From: Pittsburg, CA (BAY AREA!)
Default RE: clunk????

The "Clunk" is somewhat a common problem on 03-04 Cobra's. But I've never heard of it being on other year Cobras. This is myfirst time hearing about this being on any otheryear Mustangbesides the Terminator.

Some say it's a driveline issue, some say it's an IRS issue. No one knows exactly. Some people have swapped out better driveline parts and it went away, and some have swapped out for better IRS parts and it went away. Some do both and still have it.

I had it on my Cobra. Then I put my exhauston and it went away. I thought my exhaust drowned the noise out, but I don't feel the "thud" you feel with it so I know it's gone.
Old May 26, 2007 | 12:01 AM
  #4  
PWORLDSTANG's Avatar
PWORLDSTANG
4th Gear Member
 
Joined: Jul 2006
Posts: 1,399
From: Pittsburg, CA (BAY AREA!)
Default RE: clunk????

Also, the clunk would be there in every gear. Not just first and second. So on that Cobra, it could be a problem.
Old May 26, 2007 | 12:23 AM
  #5  
POISND U's Avatar
POISND U
5th Gear Member
 
Joined: Nov 2006
Posts: 3,569
From: So Cal
Default RE: clunk????

First of all, I seriously doubt the salesperson has any clue what's wrong with the car. Not all of us are slimeballs.....

"The Clunk", as many of us SVT owners have affectionately come to know it as, is usually (90% of the time) the differential bushings. Once in a very great while it's aU joint or diff issue and it's very rarely a clutch related issue.

I bought my car with 49,000 miles and there was no clunk. 8 year old rotted rubber bushing + hard driving = split bushings. They're $40 to $80 parts and once replaced with aftermarket (DO NOT USE OEM!) bushings it almost never happens again. They're about as difficult to install as springs so most of us can replace them....

I'm getting mine replaced next month for $150 because I'm too lazy to do it my damn self...


And yes, Cobras rule....[sm=badbadbad.gif]






Old May 26, 2007 | 12:26 AM
  #6  
Hulk99's Avatar
Hulk99
Thread Starter
3rd Gear Member
 
Joined: Sep 2006
Posts: 563
From:
Default RE: clunk????

It may have been with every gear just alot less noticable when moving. And I could not feel anything just heard it. He told me I could take it anywhere and have it checked out before I bought it, plusI have an option of buying awarranty. The car just looks, sounds and runs great compared to my GT. I just don't want to get into a car with serious issues.
Old May 26, 2007 | 12:32 AM
  #7  
97targa's Avatar
97targa
5th Gear Member
 
Joined: Apr 2006
Posts: 3,625
Default RE: clunk????

ORIGINAL: Hulk99

It may have been with every gear just alot less noticable when moving. And I could not feel anything just heard it. He told me I could take it anywhere and have it checked out before I bought it, plusI have an option of buying awarranty. The car just looks, sounds and runs great compared to my GT. I just don't want to get into a car with serious issues.
The torque factor is much higher in the lower gears as opposed to the higher ones like 4th and 5th! The cluick could be the tranny mount bushing but I doubt it, but def sounds like the u-joints!!!! Not a big deal. Def. not the pilot bushing because you would hear a whining and that would sound more like a hammer tapping the floorboard and not so much a clunk or a thud like u-joints or control arm bushing do! Also don't buy any extended warranty they are a waste of money especially if you plan on modding the car! Put the $1500 and buy some wheels and tires.
Old May 26, 2007 | 12:04 PM
  #8  
Hulk99's Avatar
Hulk99
Thread Starter
3rd Gear Member
 
Joined: Sep 2006
Posts: 563
From:
Default RE: clunk????

Thanks for all the replies guys. I think I'm gonna pass on the cobra though. It was nice, but with the difference in cash I could buy a TT kit from HP.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
67LimeCoupe
5.0L (1979-1995) Mustang
31
Sep 30, 2015 04:46 PM
67LimeCoupe
5.0L (1979-1995) Mustang
6
Sep 2, 2015 08:02 AM
whatsup62
5.0L GT S550 Tech
0
Aug 29, 2015 01:25 PM
91StangOwner
5.0L (1979-1995) Mustang
5
Aug 20, 2015 11:34 PM
soccerman58
V6 (1994-2004) Mustangs
4
Oct 11, 2005 11:14 PM




All times are GMT -5. The time now is 01:49 AM.