Build date of both discos concerned was '96 & EPC certainly makes no mention of any silicone gasket, 7316 diff gasket is what it tells me .
The thing is that diffs are supposed to be bolted on not glued in place
Sainsburgers would be a 100 mile round trip... Will common or garden bathroom silicone sealant remover do the job, or is there something special for gaskets?
FWIW a polycarbonate rotary brush inb a drill did a fairly good job though getting round the studs was a person I'm not that keen on.
Niamh