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Author: Subject: What kind of sierra diff is this??
Jasongray5

posted on 9/3/09 at 10:58 AM Reply With Quote
What kind of sierra diff is this??

Its got no tag on it, The top measures 7.5" the bottom 7" It has push in shafts, it came from a 2.0 DOHC and the ratio is 3.92??


Image deleted by owner

[Edited on 9/3/09 by Jasongray5]

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MakeEverything

posted on 9/3/09 at 12:06 PM Reply With Quote
Its one with an aluminium casing from a 2.0 DOHC with a possible ratio of 3.92....





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Richard.

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James

posted on 9/3/09 at 12:26 PM Reply With Quote
Wow! An actual larger than life photo!

Err, it has push-in shafts?

What are you asking? You seem to know everything there is to know about it?

I don't think anyone can tell you the diff' ratio if that's what you want. Chances are it's 3.92 though.

I would make a mark on one of the CV joints, turn the input flange and then see how much the shafts turn... count 'em and see.

Hope that helps,
James





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Paul TigerB6

posted on 9/3/09 at 12:52 PM Reply With Quote
Only thing else to add is that it is an open diff as opposed to a Limited Slip Diff






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Jasongray5

posted on 9/3/09 at 01:42 PM Reply With Quote
Does anyone know how easy its going to be to get in into the roadster chassis? And I thought all 7.5" diffs had bolt on shafts?? Hence why I thought it was odd





How hard can it be?

http://www.flickr.com/photos/33261515@N03/sets/72157611049241239/

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Richard Quinn

posted on 9/3/09 at 02:05 PM Reply With Quote
7" or 7.5" is the size of the crown wheel. If the top mount has a bit of a cutaway in it (so you can see the bolt when it is in situ) then it is probably a 7".
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MikeRJ

posted on 9/3/09 at 03:09 PM Reply With Quote
It's a 7 inch diff, none of the 7.5" units had push in driveshafts AFAIK.
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jacko

posted on 9/3/09 at 04:53 PM Reply With Quote
My 2l dohc donor had bolt on shafts 3.62
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Jasongray5

posted on 10/3/09 at 12:22 AM Reply With Quote
quote:
Originally posted by MikeRJ
It's a 7 inch diff, none of the 7.5" units had push in driveshafts AFAIK.


This is what confuses me!!! It has the solid upper mount as per a 7.5" diff, and measures about 7.5", BUT!! it has push in shafts???





How hard can it be?

http://www.flickr.com/photos/33261515@N03/sets/72157611049241239/

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jacko

posted on 10/3/09 at 05:13 PM Reply With Quote
I have just found out that some 2L Dohc cars have 3.91 diffs that are 7.5 and push in shafts
if this helps you

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Liam

posted on 11/3/09 at 05:22 PM Reply With Quote
quote:
Originally posted by Richard Quinn
7" or 7.5" is the size of the crown wheel.


And, conveniently, the measurement accross the top mount. This is definately a 7.5" diff.

Liam

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