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Old Jan 6, 2008 | 04:40 PM
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Default cosworth diff

can anyone tell me how do i find out if i have a 7 inch diff or 7.5 diff.thanks
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Old Jan 6, 2008 | 04:48 PM
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Measure the diammeter of the driveshaft flange:

100mm = 7"
108mm = 7.5"

Or if it's in the car:

2wd = 7.5"
4x4 = 7"
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Old Jan 6, 2008 | 04:50 PM
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thanks for the information mate
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Old Jan 6, 2008 | 05:15 PM
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why not just do it the easy way?
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Old Jan 6, 2008 | 05:23 PM
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Originally Posted by Cosworth Rallyesport
why not just do it the easy way?
Whats that then Tim?
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Old Jan 6, 2008 | 05:34 PM
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Originally Posted by RWD_cossie_wil
Originally Posted by Cosworth Rallyesport
why not just do it the easy way?
Whats that then Tim?


I thought you just measured across the bit where the big long bolt goes through!!?? i.e. what would be the 'gap' in the beam diff carrier?
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Old Jan 6, 2008 | 05:37 PM
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the locking tab for the bearing ring is at 2o'clock on a 7" and 4 o'clock on a 7.5",takes 1/10th of a second to tell.
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Old Jan 6, 2008 | 05:38 PM
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Originally Posted by kjc300
Originally Posted by RWD_cossie_wil
Originally Posted by Cosworth Rallyesport
why not just do it the easy way?
Whats that then Tim?


I thought you just measured across the bit where the big long bolt goes through!!?? i.e. what would be the 'gap' in the beam diff carrier?
why do you need to go to all that trouble?
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Old Jan 6, 2008 | 05:41 PM
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Originally Posted by Cosworth Rallyesport
the locking tab for the bearing ring is at 2o'clock on a 7" and 4 o'clock on a 7.5",takes 1/10th of a second to tell.
On the driveshaft flanges? Good info
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Old Jan 6, 2008 | 06:13 PM
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the 7inch has two long bolts that go right through the diff and 7.5 only has one on the bottom the top is two short ones that are threaded into each side
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