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02-20-2008, 05:50 AM
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CC Member
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Join Date: Feb 2006
Location: Paradise Point,
Qld
Cobra Make, Engine: Absolute Pace
Posts: 1,205
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Not Ranked
History unknown
HI Alffie,
The diff was second hand when I bought it, had a limited slip center installed and all was good.
I then changed the ratio to 3.9 and that only lasted about 6 months of hard work (factoring in when it was on stands).
The 3.9 gear set were second hand so maybe they were not the best, the new set are a later model version and are better, not by much but better.
The Au will be ok if you are just putting arround even curcuit work will be ok, it is the hard launch on a drag strip that will test the strength.
Phil
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Not all driveways reach the street!
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04-09-2008, 05:22 AM
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CC Member
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Join Date: Feb 2006
Location: Paradise Point,
Qld
Cobra Make, Engine: Absolute Pace
Posts: 1,205
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Not Ranked
Recoupe sale
The new diff should arrive soon and I will get it installed as soon as possible.
So... I have a recently rebuilt AU diff center and 2 sets of AU drive shafts/CVs.
The diff is an LSD with a brand new 3.9 gear set. The diff has had a few runs at the drags, nothing serious and the weekend at Shelby fest. I have also done about 400kms of street duty. Diff technics did the rebuild and that was just over $1000.00.
There are 2 sets of CVs one brand new never used and one pair that have done about 1500kms.
Let me know if anyone is interested.
Alffie, I will post pics when I get it installed.
I feel a 10 second pass is not to far away........
Phil
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Not all driveways reach the street!
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04-21-2008, 11:07 PM
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CC Member
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Join Date: Feb 2006
Location: Paradise Point,
Qld
Cobra Make, Engine: Absolute Pace
Posts: 1,205
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Knee bones connected to
Thge new diff has arrived, the back cover is not the one I thought came with the housing, but I think I will work with this..
See the size difference from the AU crown and pinion.
Now the work begins.
Phil
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Not all driveways reach the street!
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04-21-2008, 11:54 PM
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CC Member
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Join Date: May 2002
Location: Brisbane Australia,
QLD
Cobra Make, Engine: RMC under re-construction, GenIV with tremec 600, Jag 3.31 L/S diff
Posts: 3,318
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Not Ranked
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It's impossible to soar like an eagle when you're surrounded by turkeys.
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04-22-2008, 12:15 AM
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CC Member
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Join Date: Feb 2006
Location: Paradise Point,
Qld
Cobra Make, Engine: Absolute Pace
Posts: 1,205
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Not Ranked
Les,
I am not that brave, that is my boardroom/cutting table in my home office.
Anyway it was alright when her new diff was all over the place.
Fired up the mustangf yesterday for the first time, tough very tough.
Phil
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Not all driveways reach the street!
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04-28-2008, 12:23 AM
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CC Member
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Join Date: Feb 2006
Location: Paradise Point,
Qld
Cobra Make, Engine: Absolute Pace
Posts: 1,205
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Changed my mind
I decided to get one of the "aftermarket" cradle type rear covers, much stronger than the original.
More material to work with as well.
Phil
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Not all driveways reach the street!
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04-28-2008, 02:29 AM
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CC Member
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Join Date: Jan 2001
Location: Sunbury,
VIC
Cobra Make, Engine: Rat Rod Racer, LS1 & T56
Posts: 5,391
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Not Ranked
I Dunno Phil, looks heavy. Have you had that back cover on the scales? I reckon it'll weigh more than Andrew's tank straps.
Cheers
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Mike Murphy
Melbourne Australia
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04-28-2008, 02:35 AM
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CC Member
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Join Date: Nov 2004
Location: Sydney,
NSW
Cobra Make, Engine: Classic Revival #3199. 366ci L76, T56 6 speed, Blue circle custom paint, Australias most original cobra 2009-2010
Posts: 2,396
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Not Ranked
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Proudly registered since 2013.
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04-28-2008, 02:50 AM
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CC Member
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Join Date: Feb 2006
Location: Paradise Point,
Qld
Cobra Make, Engine: Absolute Pace
Posts: 1,205
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Fully asseembled with the carrier it would come close to Andrews tank straps. 
If you include the oil it is over.
I am hopeinh that the diff will actually work out lighter in the long run.
Phil
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Not all driveways reach the street!
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04-28-2008, 03:01 AM
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CC Member
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Join Date: Nov 2004
Location: Sydney,
NSW
Cobra Make, Engine: Classic Revival #3199. 366ci L76, T56 6 speed, Blue circle custom paint, Australias most original cobra 2009-2010
Posts: 2,396
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Weigh that bad boy and we'll compare, Ill even lend you my scales......
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Proudly registered since 2013.
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04-28-2008, 03:45 AM
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CC Member
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Join Date: Jul 2004
Cobra Make, Engine: 347 Stroker Morrison Injection. Registered.
Posts: 1,440
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Not Ranked
Hi Phil,
will you need to allter the mounting points or will the new one bolt straight in?
Regards.
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Mando
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06-05-2008, 07:16 PM
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CC Member
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Join Date: Oct 2007
Location: Darwin,
NT
Cobra Make, Engine: Classic Revival Kobra,LS7 427
Posts: 380
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Not Ranked
Hi Phil
Hows the 8.8 conversion going? Done yet?
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06-05-2008, 07:29 PM
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CC Member
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Join Date: Feb 2006
Location: Paradise Point,
Qld
Cobra Make, Engine: Absolute Pace
Posts: 1,205
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Getting there
HI Alffie,
I have machined the bosses for the rear plate and will bore the rear cover and weld them in on the week end.
I have done lots of measurements and I think everything is ok, may have to clearance a bit of the cradle that holds the diff.
The front mount is a bit simpler I may be able to use the existing mount.
The plan is to have the rear mount done then pull the old one out and work the front mount.
Then assemble the diff, order axles then we are away.
IMG]http://i158.photobucket.com/albums/t84/whybejoso/IMG_0730.jpg[/IMG]
Phil
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Not all driveways reach the street!
Last edited by Philm; 06-05-2008 at 07:30 PM..
Reason: spelling for the anal retentive
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08-02-2008, 09:24 PM
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CC Member
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Join Date: Oct 2007
Location: Darwin,
NT
Cobra Make, Engine: Classic Revival Kobra,LS7 427
Posts: 380
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Hi Phil
Have you managed to finish the 8.8 install yet?
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08-03-2008, 02:07 AM
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CC Member
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Join Date: Feb 2006
Location: Paradise Point,
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Too much to do
HI Alffie,
I have made a bit more progress but have put it off untill after the nationals.
It is a little bit bigger than I was hoping and I have a small mod to do to the chassis to get the center in.
Phil
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Not all driveways reach the street!
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10-07-2008, 03:15 AM
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CC Member
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Join Date: Oct 2007
Location: Darwin,
NT
Cobra Make, Engine: Classic Revival Kobra,LS7 427
Posts: 380
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Not Ranked
Hi Phil
Hows the AU rearend holding up? survive the nationals?
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10-07-2008, 06:56 AM
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CC Member
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Join Date: Feb 2006
Location: Paradise Point,
Qld
Cobra Make, Engine: Absolute Pace
Posts: 1,205
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Lame effort
HI Alffie,
I didn't really get a chance to get a good run at the nationals this year so The diff is in perfect condition.
The Au rear is not to bad arround the race track, it is at the drags where it shows its weekness.
Phil
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Not all driveways reach the street!
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04-26-2009, 08:48 PM
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CC Member
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Join Date: Oct 2007
Location: Darwin,
NT
Cobra Make, Engine: Classic Revival Kobra,LS7 427
Posts: 380
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Not Ranked
Hi Phil
how did the 8.8 conversion turn out? Have you finished it yet?
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05-13-2010, 05:17 AM
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CC Member
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Join Date: Oct 2007
Location: Darwin,
NT
Cobra Make, Engine: Classic Revival Kobra,LS7 427
Posts: 380
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Not Ranked
Hi Phil
Did you ever get around to putting the 8.8 in?
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05-13-2010, 02:22 PM
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CC Member
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Join Date: Feb 2006
Location: Paradise Point,
Qld
Cobra Make, Engine: Absolute Pace
Posts: 1,205
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Time Flies
HI Alffie,
I haven't yet and when I see the date we started sl of this it was a shock.
We have moved house since then and I don't have a work shop, and I have been instructed not to use the garage under the main roof as one.
My shed is almost finished and I will get stuck into it soon.
Phil
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Not all driveways reach the street!
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