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Go Back   Australian Ford Forums > Club and Speciality Forums > Forum Community Car Clubs > AU Falcon.com.au

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Old 30-10-2006, 12:38 AM   #1
blackers10
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Default EA LSD center into AU IRS

hey guys
i have been offered the LSD from an EA falcon with 2.72? i think it is ratio

i have no idea what the go is with diffs
but will the LSD go inside my AU fairlane IRS diff housing etc??

thanks

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Old 30-10-2006, 07:49 AM   #2
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put it this way, that's longer than a forte came out with, they are 3.08, basically the higher the number, the shorter the diff, that's why people get 3.73s, 3.9s, etc, i think a 2.72 would just about kill your car, especially with the long first gear
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Old 30-10-2006, 08:56 AM   #3
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As said, dont even bother trying to do it as the ratio is all wrong, and besides it will be 25 spline axles, you will have 28 splines at least for a start.
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Old 30-10-2006, 09:14 AM   #4
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The ratio would be 2.77:1... In addition to the reasons stated about you can only fit 2.77 gears on the 2.77 hemisphere.
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Old 30-10-2006, 11:52 AM   #5
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aa ok thanks guys

i just wasnt sure how all the numbers worked together..

so the ratio and splines both need to be the same as the rest of the center? so say mine is a 3.73 id need an LSD center out of a 3.73 diff?
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Old 30-10-2006, 12:09 PM   #6
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try to always stick with the AU 80 series diff, its a stronger unit

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Old 30-10-2006, 12:09 PM   #7
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oh ok
thanks guys
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