 
Main Menu
|
|
Nevada Classics
|
|
Advertise at CC
|
| S |
M |
T |
W |
T |
F |
S |
| |
|
|
|
|
|
1 |
| 2 |
3 |
4 |
5 |
6 |
7 |
8 |
| 9 |
10 |
11 |
12 |
13 |
14 |
15 |
| 16 |
17 |
18 |
19 |
20 |
21 |
22 |
| 23 |
24 |
25 |
26 |
27 |
28 |
29 |
| 30 |
|
|
|
|
|
|
|
|
CC Advertisers
|
|
 5Likes
01-17-2021, 11:27 AM
|
|
CC Member
|
|
|
Join Date: Jan 2021
Location: Birmingham,
AL
Cobra Make, Engine: Superformance Cobra #229
Posts: 3
|
|
Not Ranked
Banging noise when getting off acceleration
I have a Superformance Cobra with 351W and Tremec 5 speed. When I accelerate a little hard and then lift off the accelerator I get a huge banging/knocking from what sounds to be right behind me. I have check every bolt even removed the sway bar which made the problem worse. If I drive in a normal stuck in traffic manner it does not do it. Hoping someone else has had this issue with an SP before. Any suggestions appreciated? Also looking for troubleshooting methods.
|
01-17-2021, 11:33 AM
|
 |
CC Member/Contributor
|
|
|
Join Date: Feb 2000
Location: Greenville,
SC
Cobra Make, Engine: 70 Shelby convertible, ERA-289 FIA, ERA 289 roadster hybrid, mystery Ford powered 2dr convertible
Posts: 12,764
|
|
Not Ranked
Quote:
Originally Posted by Voipman
I have a Superformance Cobra with 351W and Tremec 5 speed. When I accelerate a little hard and then lift off the accelerator I get a huge banging/knocking from what sounds to be right behind me. I have check every bolt even removed the sway bar which made the problem worse. If I drive in a normal stuck in traffic manner it does not do it. Hoping someone else has had this issue with an SP before. Any suggestions appreciated? Also looking for troubleshooting methods.
|
Have you checked your rear shock mounts?
Early cars had known issues with the upper shock mounts.
Also check your rear differential mounts.
Bill S.
__________________
Instead of being part of the problem, be part of a successful solution.
First time Cobra buyers-READ THIS
|
01-17-2021, 11:39 AM
|
|
CC Member
|
|
|
Join Date: Sep 2007
Location: Marlboro,
NJ
Cobra Make, Engine: Contemporary Cobra
Posts: 924
|
|
Not Ranked
Noise
I would check your u joint bolts and play in the u joint....
Jon
__________________
The Impossible Only Takes A Little Longer
|
01-19-2021, 05:40 PM
|
 |
CC Member
|
|
|
Join Date: Feb 2000
Location: St. Lucia, West Indies,
WI
Cobra Make, Engine: Unique 427SC 383 stroker
Posts: 3,786
|
|
Not Ranked
Quote:
Originally Posted by saltshaker
I would check your u joint bolts and play in the u joint....
Jon
|
This ^^ in addition to the other advice given above. I had a similar issue a while back and I found that the bolts in my driveshaft to differential flange were alarmingly loose.
__________________
Tropical Buzz
Grant me the serenity to accept the things I cannot change, the strength to change the things I can, and the wisdom to know the difference. -(wasn't me)
BEWARE OF THE DOGma!! Dogmatism bites...
|
01-17-2021, 12:10 PM
|
|
Senile Club Cobra Member
|
|
|
Join Date: Feb 2001
Location: Buffalo, NY USA,
NY
Cobra Make, Engine: Superformance
Posts: 4,566
|
|
Not Ranked
Quote:
Originally Posted by mrmustang
Have you checked your rear shock mounts?
Early cars had known issues with the upper shock mounts.
Also check your rear differential mounts.
Bill S.
|
Def look at the diff mounts, some early cars have had the brackets tear out of the frame. The bolts can be tight but what they attach to isn't!
__________________
"I'm high all right, but on the real thing....powerful gasoline and a clean windshield..."
rick@autoventureusa.net
|
01-18-2021, 07:24 AM
|
 |
CC Member
|
|
|
Join Date: Sep 2002
Cobra Make, Engine: SPF#0760
Posts: 3,409
|
|
Not Ranked
I can send you the service bulletin on the shock mounts. Send me an email.
Blas
__________________
Wiring Diagrams: SPF MKII, MKIII, GT40, CSX7000, CSX8000, Corvette Grand Sport, and Shelby Sebring, Bondurant & Cinema Tribute Cars.
Owner’s Manuals: SPF MKII, CSX7000, CSX8000, Sebring, Bondurant, Cinema Tribute Cars $ GT40’s..
Large, easy to read and trace schematics with part numbers, wire colors, wire gauge, fuses, and electrical upgrade information. Trouble-shooting and replacement part numbers for those roadside repair adventures.
SPFWiringDiagrams@Comcast.net
|
01-18-2021, 08:05 AM
|
|
CC Member/Contributor
|
|
|
Join Date: Feb 2000
Location: Greenville,
SC
Cobra Make, Engine: 70 Shelby convertible, ERA-289 FIA, ERA 289 roadster hybrid, mystery Ford powered 2dr convertible
Posts: 12,764
|
|
Not Ranked
Quote:
Originally Posted by Blas
I can send you the service bulletin on the shock mounts. Send me an email.
Blas
|
Blas,
He can CLICK HERE as well, as the original 2008 bulletin is still available.
Hope all is well with you and yours.
Bill S.
__________________
Instead of being part of the problem, be part of a successful solution.
First time Cobra buyers-READ THIS
|
01-18-2021, 08:47 PM
|
 |
Senior Club Cobra Member
|
|
|
Join Date: May 2001
Location: Florence,
AL
Cobra Make, Engine: RCR GT 40 & 1966 Fairlane 390 5 speed
Posts: 4,511
|
|
Not Ranked
Voipman welcome to the forum
Dwight
__________________
''Life's tough.....it's even tougher if you're stupid.'' ~ John Wayne
"Happiness Is A Belt-Fed Weapon"
life's goal should be; "to be smarter than inanimate objects"
|
01-19-2021, 11:59 AM
|
|
CC Member
|
|
|
Join Date: Jan 2021
Location: Birmingham,
AL
Cobra Make, Engine: Superformance Cobra #229
Posts: 3
|
|
Not Ranked
My email is tullyc@is-talk.com
Thanks |
01-19-2021, 04:08 PM
|
|
CC Member
|
|
|
Join Date: Nov 2018
Location: Priceville,
al
Cobra Make, Engine: Unique FIA
Posts: 339
|
|
Not Ranked
As bad as the roads have gotten in The Ham, there's no telling what could be broken.
Different question,, Have you ever driven through Bankhead Forest?
|
01-26-2021, 11:38 AM
|
 |
CC Member
|
|
|
Join Date: Feb 2016
Location: North of London,
UK
Cobra Make, Engine: AC Cars Limited, 302 EFI
Posts: 204
|
|
Not Ranked
Have you checked the driveshaft bolts, or the UJ's?
Get it on a ramp, rotate the driveshaft with a screwdriver one way then the other. Something is obviously loose or broken.
|
01-28-2021, 08:35 AM
|
|
Senior Club Cobra Member
|
|
|
Join Date: May 2001
Location: Florence,
AL
Cobra Make, Engine: RCR GT 40 & 1966 Fairlane 390 5 speed
Posts: 4,511
|
|
Not Ranked
Quote:
As bad as the roads have gotten in The Ham, there's no telling what could be broken.
Different question,, Have you ever driven through Bankhead Forest?
|
incoming are you located in Alabama?
__________________
''Life's tough.....it's even tougher if you're stupid.'' ~ John Wayne
"Happiness Is A Belt-Fed Weapon"
life's goal should be; "to be smarter than inanimate objects"
|
02-05-2021, 08:09 PM
|
|
CC Member
|
|
|
Join Date: Sep 2020
Location: Aston,
PA
Cobra Make, Engine: ERA #834 427 side oiler
Posts: 11
|
|
Not Ranked
I would check the pinion angle, it could be binding on deceleration, I have seen this many times.
|
02-13-2021, 03:39 PM
|
|
CC Member
|
|
|
Join Date: Jan 2021
Location: Birmingham,
AL
Cobra Make, Engine: Superformance Cobra #229
Posts: 3
|
|
Not Ranked
Found Problem and i is a doozie
I found the problem. The cross member the front of the differential bolts to has cracked! I tried to post a picture but could not figure out how. My image is too big. Thanks for everyone's input. I did check the shock mounts and they are good. Wish that had been the problem much easier fix.  |
02-13-2021, 06:18 PM
|
 |
CC Member
|
|
|
Join Date: Sep 2018
Location: Howell,
NJ
Cobra Make, Engine: Backdraft Car #1209 Roush 427R
Posts: 607
|
|
Not Ranked
Picture.
If you have a photo editor like Microsoft paint, open it with the program, slightly crop it then save it. That will reduce the size significantly.
Fred
Quote:
Originally Posted by Voipman
I found the problem. The cross member the front of the differential bolts to has cracked! I tried to post a picture but could not figure out how. My image is too big. Thanks for everyone's input. I did check the shock mounts and they are good. Wish that had been the problem much easier fix. |
|
02-14-2021, 12:51 PM
|
 |
CC Member
|
|
|
Join Date: Feb 2014
Location: White City,
SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,916
|
|
Not Ranked
Quote:
Originally Posted by FredG
If you have a photo editor like Microsoft paint, open it with the program, slightly crop it then save it. That will reduce the size significantly.
Fred
|
As a professional photographer who shoots raw images with a DSLR camera, I've found that often the best way to produce downsized images that don't need high quality is just to use a screen grab or screen shot program (I'm using Greenshot on Windows and Flameshot on Linux). If they need higher quality I'll export at different settings from my raw photo editor.
p.s. I just discovered Flameshot now has a beta version for Windows, although signed binaries don't yet appear to be available. Once they are I'm probably going to try that out, if for no other reason than to have the same program on both platforms and all computers.
__________________
Brian
|
02-14-2021, 12:44 PM
|
|
CC Member
|
|
|
Join Date: Feb 2014
Location: White City,
SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,916
|
|
Not Ranked
Quote:
Originally Posted by Voipman
I found the problem. The cross member the front of the differential bolts to has cracked! I tried to post a picture but could not figure out how. My image is too big. Thanks for everyone's input. I did check the shock mounts and they are good. Wish that had been the problem much easier fix. |
Glad to see you've found the problem - now on to the not insignificant matter of getting it fixed.
__________________
Brian
|
02-14-2021, 07:07 PM
|
|
CC Member
|
|
|
Join Date: Nov 2003
Location: New Britain,
CT
Cobra Make, Engine: Size 10 Feet
Posts: 3,028
|
|
Not Ranked
Free picture editing for Windows: irfanview does cropping, resizing and color manipulation.
https://www.irfanview.com/ |
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -7. The time now is 01:01 PM.
Links monetized by VigLink
|
Hybrid Mode
