chris
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| posted on 5/6/16 at 01:05 PM |
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open diff to LSD
would like to know if it is possible to take the lsd bits out of my lsd bolt on and transfer it to my push in none lsd diff
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mcerd1
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| posted on 5/6/16 at 01:10 PM |
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Sierra diff i assume?
You can't use the push-in shafts with the ford LSD, they have to use bolt-on ones
You can swap the whole rear end to the bol-on setup or make hybrid shafts
Otherwise the aftermarket lsd's will fit in your current diff
[Edited on 5/6/2016 by mcerd1]
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bi22le
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| posted on 5/6/16 at 01:42 PM |
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quote:
Originally posted by mcerd1
Sierra diff i assume?
You can't use the push-in shafts with the ford LSD, they have to use bolt-on ones
You can swap the whole rear end to the bol-on setup or make hybrid shafts
Otherwise the aftermarket lsd's will fit in your current diff
[Edited on 5/6/2016 by mcerd1]
Oh really?
I thought you could. I have never done it before but thought i read somewhere you could. I think i wrongly informed some one just now. I'll go
back to the discussion and client myself.
Bloody 'google it so now im an expert people'!!
Track days ARE the best thing since sliced bread, until I get a supercharger that is!
Please read my ring story:
http://www.locostbuilders.co.uk/forum/13/viewthread.php?tid=139152&page=1
Me doing a sub 56sec lap around Brands Indy. I need a geo set up! http://www.youtube.com/watch?v=EHksfvIGB3I
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chris
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| posted on 5/6/16 at 01:49 PM |
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I have nearly gathered all the bits to swap over to the bolt on lsd but if I can just change the internals of the diff would save me a lot of work
converting car to discs on the rear
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mcerd1
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| posted on 5/6/16 at 02:11 PM |
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the problem is that the ford LSD requires one long stub and one short one - the open diffs have 2 equal length ones
I'm sure making one shorter is not impossible, but making one longer is not so easy !
Quaife and TranX diffs are meant to fit in open diffs - so they can't use the flanges from a ford LSD either (quaife sell diffs complete with
flanges for the cosies etc - but at a price!)
best pics I can find for now of the stubs for the ford LSD:
 
and these are the ones I personally removed from a spare open diff:
(these ones are currently attached to =tranX diff in Flak Monkeys old car)
[Edited on 5/6/2016 by mcerd1]
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Dusty
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| posted on 5/6/16 at 02:17 PM |
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I did the swap a couple of years ago. From 3.92 push in to 3.62 LSD bolt on. Took the tripode joints off the driveshafts and replaced them with
lobros, swapped the diffs and bolted it all up. The lobro joints had the same internal spline as the tripodes so was a straight swap. My original
build donor bits had all come from an 85 2.0L DFTH carbed sierra.
I know there are various varieties of sierra donor, parts may vary and maybe I was lucky but it was a very simple swap. (I never took the stubs out of
the LSD so didn't even know they were different.)
[Edited on 5/6/16 by Dusty]
[img]
 
Old diff, old tripodes part destroyed, old half shafts.
[/img]
[img]
 
LSD and open diffs
[/img]
[img]
 
New LSD diff and original halfshafts minus tripodes.
[/img]
[img]
 
Old half shaft, new lobro, new diff.
[/img]
[Edited on 5/6/16 by Dusty]
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mcerd1
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| posted on 5/6/16 at 02:21 PM |
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whatt he said ^^^
as long as you have the right size of push-in shaft then you can fit the lobro (bolt on) CV to one end
and I've still got a pair of bolt-on CV's in need of a home 
the other pair of the car went to make hybrid shafts for some on here too - along with the push-in shafts from my dad's old 2.0 pinto estate)
[Edited on 5/6/2016 by mcerd1]
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coozer
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| posted on 6/6/16 at 09:34 AM |
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quote:
Originally posted by chris
I have nearly gathered all the bits to swap over to the bolt on lsd but if I can just change the internals of the diff would save me a lot of work
converting car to discs on the rear
So you want to keep the drums? When I changed from a 3.62 open push in diff to a 3.92 viscous LSD with bolt on shafts I just cut the disc flanges off
the bearing carriers and carried on with my 10 inch drums.
1972 V8 Jago
1980 Z750
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Dudefladge
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| posted on 10/6/16 at 11:18 AM |
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This is good information to know for those of us needing a Sierra diff.
I have bolt on drive shafts (we call them axles or half shafts - the one attaching the transmission to the diff we call the driveshaft :-)
I need the diff to go with them for my Ginetta, but I keep finding open diffs with push in ax... drive shafts.
It looks like I need to find "and I've still got a pair of bolt-on CV's in need of a home"... 
Rob
Looking & Learning
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