Just found this it may have been posted before but i have not seen it
Jacko
http://www.super7thheaven.co.uk/Sierra_Rear_Differential

I cant find mine ...

It has stamped on the inside gear 88BG4210SD 3.62 and wrote on the same gear is 9E887 3.62

Its an lsd (3.62) just wondered why i cant find anything not even on a Google search ?