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Cosworth diff.

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Old 14-07-2011 | 02:10 PM
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Default Cosworth diff.

Hi quick question ... will a Scorpio 24V (Cosworth) rear diff be a direct fit on a 2wd Sapp. Cosworth ???
Old 14-07-2011 | 02:17 PM
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If it's 7.5" then almost certainly.

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Old 14-07-2011 | 02:24 PM
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Well that hard for me to explain the brakers here in Dk ... they mostly know what year it came from ... so I need to find out if there is a difference in what year the Scorpio 24V are from ??
Old 14-07-2011 | 02:57 PM
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Just ask them to measure - will prob be easier.

it its a 7" diff you will need the shafts too
Old 14-07-2011 | 03:11 PM
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if its from the earlier one (NOT the bug eye one) Then yes they are ALL 7.5" 3.62 LSD diffs which are the same as 2wd sierra cosworth
Old 14-07-2011 | 03:40 PM
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Originally Posted by S1-Tiz
if its from the earlier one (NOT the bug eye one) Then yes they are ALL 7.5" 3.62 LSD diffs which are the same as 2wd sierra cosworth
Hi

ok so pre bug/frog eye they should be a direct fit ... do you know when they got face lifted ... 94-95 ???

about the ratio .. as I remember 2wd should be 3.64 ... ?
Old 14-07-2011 | 03:47 PM
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sorry i meant 3.64 i miss typed. They got facelifted in 95. you are looking for a 1992-1994 car for the correct diff.

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Old 14-07-2011 | 03:48 PM
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All Mk3 Granada were 7.5 inch so I recall.

I didnt think the Grannies ran an LD, but I could be wrong...

3.64 for the 2.9 24v dude, better still is the 2.3 Ultima, with the lovely 3.91 final drive, just put one in mine

One word - fantastic!
Old 14-07-2011 | 03:52 PM
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but that will be an open diff! also speedo will be out.

All prefacelift 24vs ran an LSD seen way too many pulled apart now

All frog eyes were open
Old 14-07-2011 | 03:59 PM
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It works out about 9% fella. Yes they are open, but I only bought a CWP set, so kept my LSD.

Recalibration is only 50 quid, and it will prob be marginal from factory, so worth getting done. Who runs std wheel and tyre combos these days also!

I run a wheel and tyre profile with a greter rolling radius, so smaller difference on mine, but worth it seeing as motorists are the chosen means of revenue generation, and most of us drive these things to enjoy, that extra bit of accuracy is well worth it!

I stand corrected on the early cars having LSD's. Another Ford cost saving measure :-(

Last edited by Weeksy; 14-07-2011 at 04:11 PM.
Old 14-07-2011 | 04:16 PM
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Drive shaft flange is the wrong size.

You can change them from your old diff into the Granny Cossie one

Steve
Old 14-07-2011 | 04:30 PM
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I fitted one out of a bug eye, I had to chop a bit of the webbing off on the case, other than that, it was a straight swap. FLanges are the correct size aswell.
Old 14-07-2011 | 04:45 PM
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Originally Posted by S1-Tiz
sorry i meant 3.64 i miss typed. They got facelifted in 95. you are looking for a 1992-1994 car for the correct diff.
he he ok ..thourght so

So pre 95 it will be
Old 14-07-2011 | 04:47 PM
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Originally Posted by Weeksy
All Mk3 Granada were 7.5 inch so I recall.

I didnt think the Grannies ran an LD, but I could be wrong...

3.64 for the 2.9 24v dude, better still is the 2.3 Ultima, with the lovely 3.91 final drive, just put one in mine

One word - fantastic!
So 3,91 .. what would that do to the speedo. ... ?

Originally Posted by Weeksy
It works out about 9% fella. Yes they are open, but I only bought a CWP set, so kept my LSD.

Recalibration is only 50 quid, and it will prob be marginal from factory, so worth getting done. Who runs std wheel and tyre combos these days also!

I run a wheel and tyre profile with a greter rolling radius, so smaller difference on mine, but worth it seeing as motorists are the chosen means of revenue generation, and most of us drive these things to enjoy, that extra bit of accuracy is well worth it!

I stand corrected on the early cars having LSD's. Another Ford cost saving measure :-(

recalibration .. ??

So could I just find a 7½" ford diff with the prefered ratio and put in my lsd ... ?

Last edited by 2wd; 14-07-2011 at 04:52 PM.
Old 14-07-2011 | 04:53 PM
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I twould over read by about 9 percent on the std wheel and tyre combo, but as the rolling circumference grows, the different starts to diminsh... As I said, the speedo can be be recalibrated cheaply, so shouldn't put you off.

It really livens the car up, especially off boost. Best thing I have done to mine!

I found a Brand new CWP in Norway, for 100 quid, couldn't say no!

A used diff will be sweet, as the 2.3 only knocks out 140 odd horses...
Old 14-07-2011 | 06:15 PM
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Originally Posted by Weeksy
I twould over read by about 9 percent on the std wheel and tyre combo, but as the rolling circumference grows, the different starts to diminsh... As I said, the speedo can be be recalibrated cheaply, so shouldn't put you off.

It really livens the car up, especially off boost. Best thing I have done to mine!

I found a Brand new CWP in Norway, for 100 quid, couldn't say no!

A used diff will be sweet, as the 2.3 only knocks out 140 odd horses...
hmmm ... you got me thinking ... I'll have look around and see what I find .. thanks
Old 14-07-2011 | 06:22 PM
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Good luck my friend.

Try and find a 2.3 Ultima and rob it of it's diff, they go for peanuts, see how you get on with the ratio, then maybe get your LSD in there with some bearings and seals - the perfect set up!

Weeksy
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