Cheers guys

 

sure a slipper both shafts turn same way mate maybe wrong though

 

From my limited theoretical knowledge and total lack of experience with sierra diffs....it looks like a straightforward open diff

Chris

 

lol! its an open diff, dont care what car its off, its open.

can see an open from a slipper from a mile away

 

that looks like a ford slipper as the centre is offset

the way to make sure is to remove the output shafts and, if one is longer than the other, it's a slipper

if they are both the same length then it's not

the big thing bolted to the crownwheel is where the lsd bit goes on these diffs (apparently)

 

you're a better man than me then as ford rear diffs like that look practically the same whether open or lsd

 

Talking of Diffs, Martoooon was taking the ATB out of the Sierra this morning when he noticed this...

 

Not good!

Apparently the diff pictured is not an LSD

 

 

Can some kind sould pls tell me what exactly I broke and how close I was to breaking something else?

 

I might be wrong m8 but isnt that the pinion with a tooth missing, colud of been a big disaster if it had smashed anything else inside the diff.

Steve.

 

Poor effort Lee, only a single tooth damaged...........must try harder

My Quaife ATB:

 

that is indeed a tooth broken on the pinion. if that bit of tooth had got between the other teeth of that gear and the one that it meshes to (the crownwheel - the big one on the left in the first picture on the post) it would have broken more of them and you would have no drive from that diff

EDIT: much like doug has done

 

The diff is definately open, as the cover is off and I can see inside.

 

@ Dan

and thanks Guys!

Is that the Quiafe ATB thats failed, or a Ford part

 

It's the Ford part that has failed - your one looks like it's been polished and peened too............so I'm even more surprised that it failed

This pic shows the Quaife part:

 

It was Peened and Polished by Bernie at CTS... poo

Great pic! Thanks for that. I can actually see how the CWP fits with a ATB and works now. Had no idea before

 

 

Ithankyaw

 

if its a slipper itle be hard to turn the axle while holding the other 1 still. looks like a normal diff 2 me

 

looks like a ford lsd to me

 

Looks like a ford lsd to me aswell!
[sierra lsd is totally different to the rst one]

 

it is LSD i just done the same to mine

 

that is a viscous ford LSD.

 

Is there any sure fire way of testing this.

If I turn the pinion both output flanges turn the same way if that helps?

 

 

Nah thats defo plated pal.....

Paul,

Its a standard ford viscous diff....

 

turn one of the output flanges, if the other turns the same way its a limited slip diff. if it turnes the other way its an open diff

 

If I turn one of the output flanges the other one turns the same way

 

those lsd diffs have one output shaft longer than the other

so eamsure them
looks lsd to me but can't be too sure

the way to test it is to turn the pinion and hold one side output still
if it's difficult to turn then it's pretty much an lsd (or a fubar diff )

 

i concur !

 

So is it the same a standard rear cossie diff? i'm proper confused now

 

the diff you have pictured in your 1st post is a standard cosworth rear diff which has a viscous lsd as standard.

 

Thanks people

 

Yes, but if you want to sell it, it "works" just like a plated diff

 

NO IT DOESNT,NOTHING LIKE,

 

definately standard ford viscous lsd

 

so is this 3.64 7.5 diff from a bug eyed scorpio 24v also LSD? (ignore the fact that it's welded)

 

no its a standard free running diff. you tell by where the sun gear sits in relation to the crown wheel. if it sticks out its viscous. if it sits just inside its normal unit

 

correct, it was free running

but it looked like an LSD to me at first glance when i compared it to my LSD. i didn't see the subtle difference that an experienced pro like you obviously knows about

didn't matter, i was going to weld it anyway