Sorry if this is a daft question but I'm a old school mk2 guy not Sierra based at all
About 10 years ago I broke a 2.0 4x4 Sierra 1991 100k on a j reg ( I bought it as it had a YB fitted )
I kept the axle as it seemed to have a LSD fitted showing all the signs like my old escort ones ,
So present day I'm have a sort out and dig the diff out and wip the cover off to find this ?



I'm used to old escort ones where the plant /sun gears are hidden , but this is exposed ? It's thicker on the Crown wheel side which I'm guessing is where the plates are ? So what diff have I got ?
Cheers paul

 

paul you have the standard diff that came in the xr4x4 which has a 3.9 ratio .

the diff is the same lsd as the 4x4 cosworth but that has the 3.64 gearing.

 

Thanks James, it was the physical difference to LSD,s I'm used to that threw me

 

You are used to plated, this is viscous.

 

Yep usually quaife ones with the ramps crack and bang style !