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04-14-2013, 05:13 PM
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CC Member
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Join Date: Aug 2012
Location: Valley Forge,
PA
Cobra Make, Engine: Superformance -Roush 427R
Posts: 24
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Not Ranked
Superformance made me walk home !
Went out for a ride last night and heard a "POP' from the rear of the car. Then quickly noticed the engine increased RPM and speed was dropping off. -Busted Axel, CV Joint-Differential are OK. Happened in traffic at 40mph.
I had heard SF was having axel issues in the older cars but mine is an '06 build. Boo Ho. 
So, any one with any repair suggestions or valauable information ? |
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04-14-2013, 05:45 PM
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CC Member
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Join Date: Jul 2011
Location: Peoria Illinois,
il
Cobra Make, Engine: Superformance #678
Posts: 264
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Not Ranked
Bummer bud, hope it does not happen to my #678
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04-14-2013, 06:34 PM
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CC Member
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Join Date: Jul 2010
Location: McMurray,
PA
Cobra Make, Engine: Superformance #522
Posts: 528
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Not Ranked
Where exactly did it break? The Thunderbird IRS is very reliable in these cars unless you are dropping the clutch with more than 550 ft/lb and sticky tires. There are stronger aftermarket axels available if needed. Www.driveshaftshop.com |
04-14-2013, 09:35 PM
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Senior Club Cobra Member
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Join Date: Oct 2006
Location: Santa Cruz,
CA
Cobra Make, Engine: SPF 2613 Titanium w/Black, Roush 402SR
Posts: 4,097
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Not Ranked
What's your chassis number?
__________________
Doug
No stop signs, speed limit - Nobody's gonna slow me down - Like a wheel, gonna spin it
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04-14-2013, 10:51 PM
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CC Member
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Join Date: Sep 2009
Location: Camarillo,
CA
Cobra Make, Engine: SPF #2608, Roush 427SR T-W
Posts: 911
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Not Ranked
I wonder what the failure mechanism was. It is hard to imagine an axle snapping when you are just driving along, but I'm clueless about how this might happen. You mention the RPM increased, but wouldn't the limited slip keep the good axle pushing the Cobra? I lost a wheel bearing last summer and wondering if I should have inspected the axle a little closer. Do you have any pictures? Good luck pulling everything and getting it back together! It was a bit of a challenge for me, but with the help of Randy Thomas and my installer I was able to replace both wheel bearings.
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04-14-2013, 11:36 PM
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CC Member
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Join Date: Apr 2005
Location: Tucson,
AZ
Cobra Make, Engine:
Posts: 5,391
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Not Ranked
Call the Driveshaftshop and talk to them about some new axles. Best to send them your old ones and have them rebuild both with 300M center shafts.
Larry
__________________
Alba gu brąth
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04-15-2013, 05:32 AM
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CC Member/Contributor
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Join Date: Feb 2000
Location: Greenville,
SC
Cobra Make, Engine: 70 Shelby convertible, ERA-289 FIA, 65 Sunbeam Tiger, mystery Ford powered 2dr convertible
Posts: 12,716
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Neutral
Quote:
Originally Posted by GTBill
Went out for a ride last night and heard a "POP' from the rear of the car. Then quickly noticed the engine increased RPM and speed was dropping off. -Busted Axel, CV Joint-Differential are OK. Happened in traffic at 40mph.
I had heard SF was having axel issues in the older cars but mine is an '06 build. Boo Ho.
So, any one with any repair suggestions or valauable information ? |
Do we need to trailer it somewhere? I'll be around all week (on and off) if you need some help.
EDIT: I remember someone else with an earlier car who got replacement axles from http://www.driveshaftshop.com/
Bill S.
__________________
Instead of being part of the problem, be part of a successful solution.
First time Cobra buyers-READ THIS
Last edited by mrmustang; 04-15-2013 at 05:38 AM..
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04-15-2013, 08:16 AM
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CC Member
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Join Date: May 2011
Location: Hillsboro,
OR
Cobra Make, Engine: Superformance Cobra Chassis #408, 427FE, TKO600
Posts: 94
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Not Ranked
I have replacement axles from DSS on #408. Happy with them....quality item. They have the measurements on-file so it's a quick order.
I had to get different nuts for the outer axle as the ones that DSS ships have a shoulder that is too wide for the spinner adapter on the SPF...so be aware. I got mine from SPF, but I think they are just standard Ford t-bird part. I think they were like $10 each.
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04-15-2013, 12:38 PM
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Senior Club Cobra Member
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Join Date: Jan 2005
Location: VALLEY FORGE,
PA
Cobra Make, Engine: SUPERFORMANCE w DOUG MEYER ENGINE
Posts: 1,958
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Not Ranked
 Hello GTBILL
Sorry about your trouble.
You must live really close by
JB  |
04-16-2013, 01:28 PM
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CC Member
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Join Date: Aug 2006
Location: Valley Forge,
PA
Cobra Make, Engine: Superformance - Roush 427R
Posts: 21
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Not Ranked
Thanks Guys, a lot of good info......
I have #2379 with the Dana rear. I don't know how to post pictures but the axel failure looks to be a poor "Heat Treat" after splineing . There is no evidence of twisting.
In response to dropping the hammer. At 5K RPM, with sticky tires -no - at least not this time. Thanks to the application of a Demon 750 carb -good tune , I am getting 522Hp / 505FP Tqe at the rear wheels on the Dyno Jet. (Roush 427R circa 2006).
Thanks Mr.Mustang , haven't seen you since last fall at Beans Ford.
Yes JB we must be close ---I am near the Seven Stars Rest.
I am in contact with DSS in N.C. Seems they are over a month out just to assemble. Geeeeeze !
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04-16-2013, 02:32 PM
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CC Member/Contributor
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Join Date: Feb 2000
Location: Greenville,
SC
Cobra Make, Engine: 70 Shelby convertible, ERA-289 FIA, 65 Sunbeam Tiger, mystery Ford powered 2dr convertible
Posts: 12,716
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Not Ranked
Quote:
Originally Posted by GT Bill
I am in contact with DSS in N.C. Seems they are over a month out just to assemble. Geeeeeze !
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OUCH!!!!!!!!!! 
I might take yours in trade towards my FIA, you could be on the road tomorrow 
Bill S.
__________________
Instead of being part of the problem, be part of a successful solution.
First time Cobra buyers-READ THIS
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04-16-2013, 02:50 PM
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CC Member
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Join Date: Aug 2006
Location: Valley Forge,
PA
Cobra Make, Engine: Superformance - Roush 427R
Posts: 21
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Not Ranked
That's cold Bill!
My "Extra Tight Pal" Dennis Olthoff is trying to get one here by Friday.
Ya know, You could put the "Blue Light Special" on the FIA and I'll put in the garage as a spare !
Bill
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04-16-2013, 05:29 PM
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CC Member
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Join Date: Aug 2007
Location: Carlsbad,
Ca
Cobra Make, Engine: SPF 2932 with 438 Lykins Motorsports engine. Previous owner of FFR 5452.
Posts: 2,616
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Not Ranked
If you're getting 522 hp at the rear wheels, something back there is bound to eventually twist in half.
__________________
Jim
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04-16-2013, 06:06 PM
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CC Member/Contributor
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Join Date: Feb 2000
Location: Greenville,
SC
Cobra Make, Engine: 70 Shelby convertible, ERA-289 FIA, 65 Sunbeam Tiger, mystery Ford powered 2dr convertible
Posts: 12,716
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Not Ranked
Quote:
Originally Posted by GT Bill
That's cold Bill!
My "Extra Tight Pal" Dennis Olthoff is trying to get one here by Friday.
Ya know, You could put the "Blue Light Special" on the FIA and I'll put in the garage as a spare !
Bill
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Make me an offer, the worse that can happen is that I say NO.
__________________
Instead of being part of the problem, be part of a successful solution.
First time Cobra buyers-READ THIS
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