not sure if anyone did any googleing but i saw on youtube some guy has a 945 diesel and was showing off his locker he installed "had it high centered on a rock, with one wheel on traction and it rolled off the rock like nothing' any way, he installed a locker and mentioned the volvo diff's came with dana 30 axles in which case this kind of opens up the market for lockers and LSD rebuilds.
here is the video:
http://www.youtube.com/watch?v=9rx-n...eature=related
and ehre is the writeup i found mentioning a TON of info on 240 and 740 series differentials:
http://www.davebarton.com/volvorearends.html
I will copy and save this website because god knows good information is put on cheap websites and it tends to disappear. Email me if you need the specs or w/e