Diff sizes

I know this has probably being done to death but can any one tell me how can I tell a large case from a medium case diff . I know the ratio on the tag but incase they have been swapped!!!! Cheers


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Easiest way to tell is...........
Small case has six bolts holding on the back plate.
Medium case has eight bolts holding the back plate on.
Large case(evo) has a removable mount bolted to the back plate.

Thanks :)


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