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09-02-2007, 12:39 PM
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Join Date: Jun 2003
Location: Oakham,
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Cobra Make, Engine: Kirkham 592
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I have a jag rear with 2:88's will 3:42's fit in the case?
I want to go with a different ratio. I'm going to sell my 4 speed (currently apart) and install a 5 speed so I want at least 3:42's
chris
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09-02-2007, 03:00 PM
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The CWI site lists 2.88 - 5.11, but doesn't say whether they will all fit on the same carrier.
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09-02-2007, 04:35 PM
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Join Date: Jan 2002
Location: Provo,
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Cobra Make, Engine: HiTech Legends GT500
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2.88 has a unique carrier.
3.07 to 3.73 and (4.10) take the low case.
3.91 and bigger take the high case.
But a 2.88 will work with a five speed until you can find a different carrier.
Note: the total first gear multiplication on a stock 427 AC Shelby Cobra is 3.54 (stock diff ratio) * 2.32 (1st gear, close ratio toploader) = 5.86
Now your set up would be 2.88 * 2.87 = 8.27
as you can see 8.27 is a lot more total gear reduction than 5.86 which is about the lower limit and not burn up clutches.
Hope this helps
Last edited by Tom Kirkham; 09-02-2007 at 04:38 PM..
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09-02-2007, 06:44 PM
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Join Date: Apr 1999
Location: cleveland,
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Cobra Make, Engine: CSX4000, 427
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Quote:
Originally Posted by Tom Kirkham
2.88 has a unique carrier.
3.07 to 3.73 and (4.10) take the low case.
3.91 and bigger take the high case.
But a 2.88 will work with a five speed until you can find a different carrier.
Note: the total first gear multiplication on a stock 427 AC Shelby Cobra is 3.54 (stock diff ratio) * 2.32 (1st gear, close ratio toploader) = 5.86
Now your set up would be 2.88 * 2.87 = 8.27
as you can see 8.27 is a lot more total gear reduction than 5.86 which is about the lower limit and not burn up clutches.
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Actually, with an "original cobra", the gear multiplication would be 2.32 x 3.54 which equals 8.21, very similar to the TKO600 1st gear 2.87 with 2.88 rears.
With this combo, definitely get the 0.82 fifth.
Another option would be to use a wide ratio toploader, 2.78 first, and with fourth 1:1, with 2.88 rears, you really don't need a 5th gear. 
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"After jumping into an early lead, Miles pitted for no reason. He let the entire field go by before re-entering the race. The crowd was jumping up and down as he stunned the Chevrolet drivers by easily passing the entire field to finish second behind MacDonald's other team Cobra. The Corvette people were completely demoralized."
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09-03-2007, 02:49 PM
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Thanks guys. Damn! Anyone want to buy a rear?
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09-03-2007, 02:59 PM
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Cobra Make, Engine: SOLD: 2013 Boss 302 Mustang #2775 (both options). SOLD: 95 Mustang Cobra R #4 of 250 "Rosie's Diner" car. SOLD: CCX2-2505, #5 of 7 289 FIAs ever produced at Contemporary! my first Cobra: Unique 427SC w/ 428CJ moder!
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I ran a 2:88 rear with a Richmond Gear 5 speed (with the final drive being 1:1, not an OD fifth) and the car had an extremely usable power band.
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REMEMBER....In Case of Spin....Both Feet in!!!!!
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09-03-2007, 04:39 PM
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Anthony,
Thank you for catching my mistake.
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09-03-2007, 06:11 PM
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diff
ng8264723 what is your email address for the diff?
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09-04-2007, 06:30 AM
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Chris Heinis
chenis5950@charter.net
Oakham MA 01068
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