Bacon2002
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| posted on 9/9/07 at 01:24 PM |
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7" Sierra Differential
Hi,
I have a 7.5" Sierra differential (from a 2.0l 1991 XR4i) which unfortunately won't fit my build (GTS Panther).
It looks like I will need to use a 7" Sierra diff.
Does anyone know if I will be able to use my existing bolt on driveshaft and hubs (from the 7.5" differential) with a 7" Sierra diff.
Strange question I know but it is probably cheaper and easier if I can use the original driveshafts and hubs etc.
Thanks,
David
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iiyama
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| posted on 9/9/07 at 02:18 PM |
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Yup, you can. Have to take both of them apart to do it though and swap over the necessary bits. easier said then done!!! 
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Paul (Notts)
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| posted on 9/9/07 at 05:08 PM |
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I could well be wrong BUT I thought the only size difference between the 7 1/2 inch and 7 inch was the mounting and case at the front. The output
flanges are both the same size on the bolt on types and I thought they were same distance apart on both. so shafts should be the same...
Paul
NB as I said I could be wrong....
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darrens
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| posted on 9/9/07 at 06:33 PM |
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nay lad, 7 1/2" diff (granada) has larger flanges. The diff width is exactly the same i.e distance between flanges.
I know cos I have one sat in my garage
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Bacon2002
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| posted on 9/9/07 at 07:11 PM |
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darrens,
When your next in your garage could you measure the diameter of the flanges on your differential/drive shafts.
That way I can check if my Sierra ones are the same.
Many thanks,
David
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darrens
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| posted on 9/9/07 at 09:10 PM |
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quote:
Originally posted by Bacon2002
darrens,
When your next in your garage could you measure the diameter of the flanges on your differential/drive shafts.
That way I can check if my Sierra ones are the same.
Many thanks,
David
Rate then, I had forgot a few things, flanges are 108mm (standard LSD sierra being 95mm ish)but have a read of this
http://www.locostbuilders.co.uk/viewthread.php?tid=30267&page=&contribmessage=none
specifically page 2
Cheers
[Edited on 9/9/07 by darrens]
[Edited on 9/9/07 by darrens]
[Edited on 9/9/07 by darrens]
[Edited on 9/9/07 by darrens]
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Bacon2002
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| posted on 9/9/07 at 09:41 PM |
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darrens,
That link is really helpful, if not a bit confusing.
I am thinking that since my 7.5" diff has 100mm flanges (and drive shaft flanges) then all I need to do is replace the diff with a 7" one
that has 100mm flanges and I should be able to use my existing drive shafts/hubs etc.?
So basically I need a 7" diff with 100mm bolton flanges.
Or am I miss understanding?
Thanks,
David
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darrens
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| posted on 9/9/07 at 10:49 PM |
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quote:
Originally posted by Bacon2002
darrens,
That link is really helpful, if not a bit confusing.
I am thinking that since my 7.5" diff has 100mm flanges (and drive shaft flanges) then all I need to do is replace the diff with a 7" one
that has 100mm flanges and I should be able to use my existing drive shafts/hubs etc.?
So basically I need a 7" diff with 100mm bolton flanges.
Or am I miss understanding?
Thanks,
David
correct!!
I got a set of half shafts machined with smaller flanges to fit my 7.5" diff and thus fitmy sierra driveshafts (only because I wanted to keep
the granada lsd)
cheers
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Bacon2002
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| posted on 10/9/07 at 09:55 AM |
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darrens,
Thanks very much for you help.
Much appreciated.
David
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Paul (Notts)
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| posted on 10/9/07 at 04:43 PM |
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darrens
Got a 7 LSD diff in the garage and two 71/2 inc diffs all three have the same size output flanges....................
Paul
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