alfas
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| posted on 28/6/13 at 04:09 PM |
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how can you tell ford diff sizes 7" - 7.5"
i´m a bit confused about my diff size:
it should be from a sierra cosworth 2wd..ergo: 7.5inch
i bought one from a scorpio (i think called "Granada mk3 in UK?) which should be always a 7.5inch
than i checked this page:
http://www.super7thheaven.co.uk/Sierra_Rear_Differential
both my diffs have a long bolt on the front lower fixing, the width on the lower fixing is around 177mm on both diffs...which would mean 6,99inch.
..ergo 7" diff as i thought this lower fixing measurement indicates the diff size?
the width measured from drive-flange to drive-flange is roughly 300mm on both diffs.
so can anybody help me to identify my diff?
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alfas
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| posted on 28/6/13 at 04:18 PM |
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sorted....my mistake was measuring the lower fixing width...i should have measured the upper one....so its 193mm on both diffs. ergo: 7.5"
but another question:
the diff in the car has a rear top-mount.
my spare diff has a koala mount.
so i swap the diff-covers and thats it?
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jacko
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| posted on 28/6/13 at 07:22 PM |
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Yes that about it on a lot of kits the mount you are talking about is not used
Have a look at Google images and you will see all the different types for sierra / granada
Jacko
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avagolen
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| posted on 28/6/13 at 08:24 PM |
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As far as I know, the easiest way to tell a 7 inch from a 7.5 inch one is the front top bolt
mounting hole in the casing is solid in the 7.5 inch diff and open in the 7 inch unit.
 
This is a 7 inch diff and you can see the hollowed out top mounting.
HTH
The Answer for everything, but never the last word....
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robinj66
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| posted on 28/6/13 at 09:38 PM |
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Good tip. Thanks
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