`when you tighten the screws that hold the diff cases together the plastic is beeening pulled out and not letting the cases set
flush pre-assemble the diif halfs then take them apart ,deburr
the holes ,then reassemble .for insurance ,coat the gasket with
silcone and let dry before assembling ,
you,ll get some leaks but that will be coming out of the outdrives
you can put some mugen grease on the o-rings before putting the washer and pin on and that should fix that problem.