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Topic: Diff Advice Needed (Read 913 times) |
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Dave2302
Senior Member
2006 Mercedes S55 AMG, Retired Barefoot Waterskier
 
Posts: 1119
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Diff Advice Needed
« on: Mar 15th, 2012, 10:23am » |
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Oh B@lls 
Came to build the 7.5" diffs for the Puma yesterday, have stripped 2 Cosworth GRANADA diffs and robbed the LSD's, and Stripped a 4.27 to fit the LSD into, will also be doing a 3.9 for it soon.
No problem built the diff up, all ok.
I'm using Cosworth Scorpio Shafts Hubs Etc, these have 108mm Lobro's (CV Joints), the biggest of all I'm told.
I have some 108mm Diesel / Cossie Scorpio flanges for the diff, which ages ago some numpty told me fitted the LSD !!
They DON'T !!
Once the LSD is installed these don't fit because the diff gears are central in an open diff and offset in a viscous LSD, and therefore I need a 108mm flange with a longer shaft one side and shorter shaft the other side.
Does anyone know if these 108mm Shaft Joints were fitted to anything standard (with 7.5" Viscous LSD) in the ford range
Or am I going to have to have standard open diff 108mm ones machined and shafts from the LSD versions machined and then get hem professionally welded together
The only other option I can see is to go down a size in driveshafts, joints, and hub stub axles but I don't want to do this and I'm not even sure these would be the right length, or fit the Cosworth SCORPIO hubs
Certainly Sierra rear shafts are too short, as I've looked at a set 
Any Ideas
Cheers Dave
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Dave "The 'ol Bear" ex Footer !
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Dave2302
Senior Member
2006 Mercedes S55 AMG, Retired Barefoot Waterskier
Posts: 1119
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Re: Diff Advice Needed
« Reply #1 on: Mar 15th, 2012, 12:08pm » |
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Ahh I've had a reply on another forum................
The flanges I need do exist, 108mm with Viscous LSD were fitted to 2wd Sierra Cosworth.................
Anyone got a pair, I'm going to need 3 pairs in all to build all my diffs up 
If anyone has a set they could post me for beer tokens please let me know
Cheers Dave
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Dave "The 'ol Bear" ex Footer !
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Matt
Senior Member
Manual'd and a 4.0 in the making
Posts: 2816
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Re: Diff Advice Needed
« Reply #2 on: Mar 15th, 2012, 12:08pm » |
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Hiya dave
i can only assume you will need the granada setup you got tge lsd off
Try the caterham builders forum they use ford rear end so might already have a solution
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FDS2000 Scans - Birmingham
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Dave2302
Senior Member
2006 Mercedes S55 AMG, Retired Barefoot Waterskier
Posts: 1119
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Re: Diff Advice Needed
« Reply #3 on: Mar 15th, 2012, 1:27pm » |
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Hi Matt,
No that's the problem, GRANADA Cosworth has 7.5" Viscous LSD, but 100mm flanges LOL,
The flanges I need are 108mm, but the only 7.5" LSD with these was 2wd Sierra Cosworth....................
The 108mm Diesel and V6 Scorpio's all had open diffs so their flanges, (which I already have 2 sets of, and I think you have another set for me LOL) don't fit the LSD !!
Got a headache now, 
I've got one pair of Cosworth Sierra ones coming now, so I only need 2 more sets for the other 2 diff ratios (3.9 and 3.6)
First Event is end of the month, 2wd mode with 4.27 diff, so at least I can get that one in first, building it this afternoon.
Gearbox is already built with 2wd transfer guts, might get engine in and running by Saturday
Cheers Dave
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Dave "The 'ol Bear" ex Footer !
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