as above just been offerd one and its welded, will it make any difference its a 7.5 inch diff, Been looking at getting mine welded but found this one.

I know as its welded it will make a different but as its a 7.5 inch cossie one will if fit my 1.8 hatch sierra and will the ratio's etc make it any better/different.

Thanks

 

Yes it will fit, as to gearing depends on what you have to start with, cossie is 3.62:1.
tabetha

 

Nope. Won't fit.

Flange size is 108 on the Cossie one and 100 on other Type-B ones. It will physically fit in the rear beam, but will not bolt up to anything on the drivetrain.

Your diff should be a drum-based one and the Cossie one will be a disc-type. You would need to either convert to discs on the back or go for a mix-match of shafts to make it work.

You could have one of the rare 1.8 CVH models with ABS. Therefore you could already have the rear discs, but the shafts, etc... still will not fit the 2wd Cossie diff.

Rear discs and a 4x4 Cossie rear diff would work though

 

Why would you want to run a welded lsd anyway? Kinda defeats the point!

 

Thanks for helping guys.

I race my knackerd old sierra in the super rods down in dover and when the is damp (all the time) i get no traction what so ever out of the corners so i'm gunna try a welded rear diff.

I found a diff from a saff cos and it says it had been welded i didnt even think about it being an lsd . Thats either a waste of time or someones telling tales.

If it dont fit then i'll just get mine welded.

Thanks

 

you might be able to remove the output stubs from the cossie diff and then your lobro ones should just lide in and mesh with the splines, but weather they will fit when everythign is bolted up together is a different matter altogether

 

So, you are going to weld up your diff to get extra traction out of a corner?

If the way JB's Saff goes with its welded diff, you will be going sideways more than your will be in a straight line

 

Its a half muddy track and you put your foot down out the corner even with 1.8 cvh power it just spins half the way up the straight

 

A welded diff loses you traction in anything other than a perfectly straight line on sticky tarmac.

 

That's what I was thinking. Welded diff would be the worst possible option there....

 

so i'm gunna get more traction with 1 wheel rather than 2 . dont forget this is only a 1.8 sierra so it dont have much power.

 

So, put a rear beam in from a 2.0 XR4x4, it is a 7" LSD with a 3.92 ratio (quicker acceleration).

 

The welded diff will only do two things, push your car straight into a ditch, or make the back end step out in every corner. I've got a welded 7,5" cossie diff and it's a nightmare.
Fun in the wet tho when you'r trying to drift