i cant seem to find any info on viscious couplings, but i have read a little about welded diff's, and cheapest one i have found is 300(from buschur) i was just curious as to what i should do, i hear welded diffs makes the tranny a little weaker..but i have no pro's or cons about the coupling, any insight would be helpful. i figure if i gotta pull the tranny off to do this i might wait and just save some money and build it up.