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01-24-2015, 05:44 PM
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CC Member
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Join Date: May 2009
Location: Naples,
FL
Cobra Make, Engine: CSX-1000 Shelby AC Cobra
Posts: 63
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Not Ranked
CSX Cobra Rear Axle Stamp
Did all continuation CSX Cobras get the Aluminum rear axle stamped at shelby?
Today I opened the aluminum panel to access rear center section from trunk and while looking at the rear end I noticed a CSX number stamped into the rear end. I also have discovered the cars number written in black marker on at least 7 different bare aluminum panels while rolling around under and around the car. but the rear axle is actually stamped CSX---.
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01-24-2015, 10:48 PM
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CC Member
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Join Date: Mar 2001
Location: Provo,
Ut
Cobra Make, Engine: Kirkham, 427
Posts: 6,990
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Not Ranked
We have made a ton of differentials for Shelby. We don't stamp CSX anything into them.
David
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01-25-2015, 05:54 AM
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CC Member
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Join Date: May 2009
Location: Naples,
FL
Cobra Make, Engine: CSX-1000 Shelby AC Cobra
Posts: 63
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Not Ranked
David thank you for the reply. My car was around 2005 era. Have you always made the rear axle for Shelby? Or have they sourced others for this part. See photo of my rear end from csx car. 
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01-25-2015, 08:47 AM
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CC Member
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Join Date: Jan 2009
Location: Las Vegas,
NV
Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR
Posts: 5,615
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Not Ranked
Hmmm, that's not a VIN number...
__________________
Cheers,
Tony
CSX4005LA
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01-25-2015, 08:55 AM
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CC Member
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Join Date: May 2009
Location: Naples,
FL
Cobra Make, Engine: CSX-1000 Shelby AC Cobra
Posts: 63
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Not Ranked
Could it be they numbered the rear ends like the engine blocks? Does anyone else with a CSX Cobra have these numbers on the Center Section?
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01-25-2015, 09:04 AM
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Senior CC Premier Member
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Join Date: Nov 2004
Location: SoCal,
CA
Cobra Make, Engine: CSX #4xxx with CSX 482; David Kee Toploader
Posts: 3,574
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Not Ranked
When I get a chance I will check mine. I know my engine block is stamped with a CSX number (not the vin) and there are several numbers in random places under the car to identify the actual car number which I believe was done during the build to identify which parts go to which car.
__________________
All that's stopping you now Son, is blind-raging fear.......
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01-25-2015, 09:43 AM
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CC Member
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Join Date: Mar 2001
Location: Provo,
Ut
Cobra Make, Engine: Kirkham, 427
Posts: 6,990
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Not Ranked
I think we started making differentials for Superformance (who installed them in Shelby rollers) around 2006. As we have never stamped CSX in anything, maybe Superformance, or Shelby, stamped them. Not sure.
We have repaired many, many differentials from that era in Shelby's (differentials we didn't make). Please send a pic of your differential from below so I can see the axle housings and the axles. Also, we stamp our differentials on the bottom, right beside the drain plug. I can probably tell who made it with a pic from below. Make sure you get the entire differential in the pic.
David
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01-25-2015, 10:08 AM
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CC Member
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Join Date: May 2009
Location: Naples,
FL
Cobra Make, Engine: CSX-1000 Shelby AC Cobra
Posts: 63
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Not Ranked
David this car is one of the 13 CSX 1000 Cars with Aluminum Body by AC in England. The black rear cover says DANA.
Last edited by mullen2; 01-25-2015 at 11:59 AM..
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01-25-2015, 10:16 AM
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CC Member
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Join Date: Mar 2001
Location: Provo,
Ut
Cobra Make, Engine: Kirkham, 427
Posts: 6,990
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Not Ranked
Not our differential.
The DANA on the back means the differential is a DANA unit. Original Cobras ran DANA 44 units.
I hate to tell you this but I suggest you inspect your axles to see if they are twisted or cracked.
David
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01-25-2015, 11:28 AM
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CC Member
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Join Date: May 2009
Location: Naples,
FL
Cobra Make, Engine: CSX-1000 Shelby AC Cobra
Posts: 63
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Not Ranked
I have the car up in the air on a lift so I was able to inspect the axels and can't find any sign of cracks or twisting. Was this a problem on Shelbys having bad axle shafts? It looks likes a aluminum shelby center section with Dana guts. I have a Hemi Cuda with a dana and have torn up everything but the Dana racing it. Always had good luck with them. But sounds like I may need to keep an eye on axel shafts?
Last edited by mullen2; 01-25-2015 at 11:31 AM..
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01-25-2015, 01:18 PM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
Ca
Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
Posts: 1,244
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Not Ranked
354 is the gear ratio, the CSX is just to identify that it was a part that was supplied by SAI, SAI acquired it from the vendor..........Kirkham in this instance.
Last edited by CompClassics; 01-25-2015 at 01:21 PM..
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01-25-2015, 02:09 PM
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Senior Club Cobra Member
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Join Date: Feb 2003
Location: sac., ca,
ca
Cobra Make, Engine: owned Kirkham for 11 years
Posts: 1,033
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Not Ranked
Mullen,
Comp Classics beat me to it. 354 denotes the ratio. And a good one to have, I believe.
Maurice
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01-25-2015, 04:39 PM
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CC Member
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Join Date: Mar 2001
Location: Provo,
Ut
Cobra Make, Engine: Kirkham, 427
Posts: 6,990
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Not Ranked
Quote:
Originally Posted by mullen2
I have the car up in the air on a lift so I was able to inspect the axels and can't find any sign of cracks or twisting. Was this a problem on Shelbys having bad axle shafts? It looks likes a aluminum shelby center section with Dana guts. I have a Hemi Cuda with a dana and have torn up everything but the Dana racing it. Always had good luck with them. But sounds like I may need to keep an eye on axel shafts?
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I am talking about the differential stub axles--not the 1/2 shafts. You have to pull the axles out of the differential to inspect them. You can't inspect the axles unless you pull them out of the differential. It is a fairly big job.
David
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01-25-2015, 04:40 PM
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CC Member
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Join Date: Mar 2001
Location: Provo,
Ut
Cobra Make, Engine: Kirkham, 427
Posts: 6,990
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Not Ranked
Quote:
Originally Posted by CompClassics
354 is the gear ratio, the CSX is just to identify that it was a part that was supplied by SAI, SAI acquired it from the vendor..........Kirkham in this instance.
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We did not supply this particular differential. We have supplied many, many others.
David
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01-25-2015, 10:53 PM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
Ca
Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
Posts: 1,244
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Not Ranked
I stand corrected, I wasn't aware that anyone else supplied the differentials to SAI. SAI stamped the differentials to distinguish the axle ratios when the Cobras were being built.
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01-25-2015, 10:56 PM
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Full Blown Member
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Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
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Not Ranked
Could it have been George Petrus?
__________________
rodneym
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01-25-2015, 11:01 PM
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CC Member
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Join Date: Mar 2001
Location: Provo,
Ut
Cobra Make, Engine: Kirkham, 427
Posts: 6,990
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Not Ranked
Quote:
Originally Posted by rodneym
Could it have been George Petrus?
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I think it was Petrus. However, I am not sure.
David
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