Quick question....

Are Sierra 7" LSD and non LSD crown wheel and pinions interchangeable?

I've got my LSD in bits to replace the bearings so thought to go from 3.6 to 3.9 while i'm about it.

yes

Yes they are. All 7" are interchangeable

Thanks chaps. Thank gawd for that. Looks like i'll be buying another diff and reconditioning two. Any idea who keeps a stock of free diffs? - not free as in giveaway obviously