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 9Likes
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Post By 1985 CCX
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Post By Mark IV
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Post By Harpoon PV2
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Post By 1985 CCX
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Post By Thor maine
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Post By 1985 CCX
12-14-2024, 01:48 PM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
Posts: 19,034
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Not Ranked
AK1085 diffy
I wanted to start a thread detailing the changes planned for the rear differential of AK1085.
As most of you may know these cars come with a 3.07 rear end which is a bit anemic for use in a cobra type vehicle.
Considering many modifications around the motor, which is a 302, there are a plethora of offerings however you’re still gonna be plagued by the fact that the rear end gear is 3.07, fifth gear is not attainable until over 85 miles an hour currently.
Common sense dictates the changing the rear end from a 3.07 to a 3.54 should help delivery of the power it currently has.
So with the help of Mitchell’s Differential, I took a Diffy from another MKIV and modified it with all new gears, seals and bearings taking it to a 3.54 retaining the original posi-traction rear end.
I also have a 3.31 getting re-bearing and re-sealed for possible use of the 3.54 is not what I like.
Never hurts to have spares……….. 
Before install I will paint it red with the rear cover black so it at least matches what they once were.
Last edited by 1985 CCX; 12-14-2024 at 01:57 PM..
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12-15-2024, 02:00 AM
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Senile Club Cobra Member
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Join Date: Feb 2001
Location: Buffalo, NY USA,
NY
Cobra Make, Engine: Superformance
Posts: 4,543
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Not Ranked
Jeff,
I have the speedo gear you will need for both ratios.
__________________
"I'm high all right, but on the real thing....powerful gasoline and a clean windshield..."
rick@autoventureusa.net
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12-15-2024, 09:04 AM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
Posts: 19,034
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Not Ranked
Awesome
Project commencing after the 427 install on the other car.
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12-15-2024, 10:12 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: 12,728
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Not Ranked
Will be watching your progress, as I'm watching the market for a second hand "AK" that is currently collecting dust in an owners garage awaiting to be rescued by someone like me with too much time on his hands  .
Bill S.
PS: Any leads, or ideas were to look would be greatly appreciated
__________________
Instead of being part of the problem, be part of a successful solution.
First time Cobra buyers-READ THIS
Last edited by mrmustang; 12-15-2024 at 10:15 AM..
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12-15-2024, 06:39 PM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
Posts: 19,034
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Not Ranked
Bill
Hope you join the AC group.
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12-16-2024, 07:01 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: 12,728
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Not Ranked
Quote:
Originally Posted by 1985 CCX
Bill
Hope you join the AC group.
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I belong to so many groups, I've lost track. Is it a facebook, forum based, or ???? Feel free to PM me so I can figure out if I belong already or not.
Thanks again
Bill S.
PS: Is this the one where Hurley is trying to rewrite history, over, and over, and over, and over again? If so, I belonged, but left long ago as it was not worth beating my head against the brick wall of his "family legacy".
__________________
Instead of being part of the problem, be part of a successful solution.
First time Cobra buyers-READ THIS
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12-17-2024, 11:25 AM
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Senior Club Cobra Member
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Join Date: Feb 2005
Cobra Make, Engine: Contemporary, FE, Tremec TKO 600
Posts: 1,985
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Not Ranked
Quote:
Originally Posted by mrmustang
I belong to so many groups, I've lost track. Is it a facebook, forum based, or ???? Feel free to PM me so I can figure out if I belong already or not.
Thanks again
Bill S.
PS: Is this the one where Hurley is trying to rewrite history, over, and over, and over, and over again? If so, I belonged, but left long ago as it was not worth beating my head against the brick wall of his "family legacy".
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Bill, who is "Hurley"? I'm unfamiliar with the name. |
12-17-2024, 12:47 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: 12,728
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Not Ranked
Quote:
Originally Posted by 767Jockey
Bill, who is "Hurley"? I'm unfamiliar with the name.
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Spelling might be off, close if not dead on.
Son, grand son, or nephew of the original 60's owners of "AC". His "take" on anything cobra, CS, or later AK related is slightly off kilter.
I'll leave it at that.
__________________
Instead of being part of the problem, be part of a successful solution.
First time Cobra buyers-READ THIS
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12-17-2024, 11:34 PM
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CC Member
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Join Date: May 2021
Cobra Make, Engine:
Posts: 519
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Not Ranked
Quote:
Originally Posted by mrmustang
Spelling might be off, close if not dead on.
Son, grand son, or nephew of the original 60's owners of "AC". His "take" on anything cobra, CS, or later AK related is slightly off kilter.
I'll leave it at that.
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AC Cars LTD was owned by Charles and his nephew Derek Hurlock during the Cobra days. They were incredibly wealthy, and while AC Cars was small, they owned some 24 other company's, with government contracts, so the cars were a hobby, they could have bought the entire Shelby company out of petty cash. it was Carrol that took more and more liberties with the truth, as time went by. Just look at CSX2000 and an Ace 2.6, and you will see that Shelby and Ford did not completely redesign the car. Don't get me wrong, no Carrol no Cobra, conversely, no AC no Cobra, because he was pretty much out of English car makers! Cheers, Dennis |
12-27-2024, 10:30 PM
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CC Member
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Join Date: Mar 2020
Cobra Make, Engine:
Posts: 129
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Not Ranked
Will this not make 1st and 2nd particularly low off the mark? Especially 1st!?
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12-28-2024, 09:30 AM
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CC Member
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Join Date: Oct 2006
Cobra Make, Engine: Former owner of Long Live the Bow tie Contemporary #102 427 Chevy .30 over Merlin heads 11to1, TBI injection
Posts: 751
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Not Ranked
looks just like the jaguar type center section?
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12-28-2024, 02:47 PM
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CC Member
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Join Date: Nov 2018
Location: Priceville,
al
Cobra Make, Engine: Unique FIA
Posts: 337
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Not Ranked
3.54 will be just fine.
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12-30-2024, 09:08 AM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
Posts: 19,034
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Not Ranked
Quote:
Originally Posted by Thor maine
looks just like the jaguar type center section?
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That is what AC used, 4HU type.
Very strong
Great internals especially the old school posi
Last edited by 1985 CCX; 12-30-2024 at 09:41 AM..
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12-31-2024, 09:37 AM
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CC Member
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Join Date: Oct 2006
Cobra Make, Engine: Former owner of Long Live the Bow tie Contemporary #102 427 Chevy .30 over Merlin heads 11to1, TBI injection
Posts: 751
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Not Ranked
Quote:
Originally Posted by 1985 CCX
That is what AC used, 4HU type.
Very strong
Great internals especially the old school posi
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Yup it's a DANA 44 |
01-01-2025, 07:35 PM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
Posts: 19,034
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Not Ranked
Indeed, the old school stuff as they tell me the newer stuff is not as rugged.
This place doea a bunch of offroad applications and thus seem to know...
They are a Dana Dealership as well.
Last edited by 1985 CCX; 01-02-2025 at 09:53 AM..
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