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Sierra LSD Diff unit
gaz_gaz - 19/5/14 at 07:54 PM

Evening chaps,

I'm looking for a Sierra LSD ideally complete in a casing and a 3.62 ratio. and push in shafts to make things easy.

The closer to Maidenhead the better but it must be in good usable condition first and foremost.

cheers

Gary

matt_gsxr - 19/5/14 at 09:25 PM

Fairly sure that push in shafts don't work with LSD. LSD are all bolt on.

gaz_gaz - 19/5/14 at 09:42 PM

Oh ok.

well is it as simple as removing a diff and push in shafts and replacing with an LSD unit and bolt on shafts?

Wadders - 19/5/14 at 09:44 PM

You have u2u

snapper - 20/5/14 at 04:40 AM

The push in hubs are different, there is an article on converting specific push in shafts to a hybrid bolt on at the diff push in at the hub variant but requires diesel push in shafts of the same diameter as bolt on shafts

gaz_gaz - 20/5/14 at 06:15 AM

Ok.

is there anything stopping me from changing, diff, shafts and hubs in that case?
The diff in the car has been ran low on oil so I figure I might aswell swap in a LSD while I'm here.

mcerd1 - 20/5/14 at 07:10 AM

quote:
Originally posted by gaz_gaz
is there anything stopping me from changing, diff, shafts and hubs in that case?


its not really going to stop you but the 'bolt-on' shafts all used disc brakes on the rear, so your drums won't just be a strait swap - most folk seem to swap to rear discs too - but that could upset your brake balance.....
(I think you can fit the drums to the bolt-on hubs, but it may involve some tweaking as most of the dimensions are a little different)

gaz_gaz - 20/5/14 at 07:21 AM

My car already has discs on the rear but has an open diff with push in shafts.

hkp57 - 20/5/14 at 07:44 AM

quote:
Originally posted by gaz_gaz
My car already has discs on the rear but has an open diff with push in shafts.



Get a standard open diff with push in shafts with the ratio you want then add a ATB diff unit from Quaife or 3J

ATB diffs are better suited to lighweight cars on combined road and track use and are a fit and forget item.

Wadders - 20/5/14 at 07:45 AM

I had some custom drive shafts made by GB engineering, in my case push in spline at the diff end and lobro spline at the hub end.

Lighter and stronger than the sierra ones as a bonus.

gaz_gaz - 20/5/14 at 08:29 AM

quote:
Originally posted by hkp57
quote:
Originally posted by gaz_gaz
My car already has discs on the rear but has an open diff with push in shafts.



Get a standard open diff with push in shafts with the ratio you want then add a ATB diff unit from Quaife or 3J

ATB diffs are better suited to lighweight cars on combined road and track use and are a fit and forget item.


to be fair that does sound a better idea than changing diff. shafts. hubs. brakea and it's now been said I'd need to do uprights aswell as MNR use diff uprights for lobro.

hkp57 - 20/5/14 at 11:54 AM

to be fair that does sound a better idea than changing diff. shafts. hubs. brakea and it's now been said I'd need to do uprights aswell as MNR use diff uprights for lobro.



You can check the splines match on your shafts from this DRAWING

You can either buy the diff on its own like this Quaife

Or a complete unit ready to bolt in "Complete Unit"