My differential seal is leaking very slightly so i'll have the seal replaced and probably the transmission mounts done at the same time.

I did see through search an opinion that the automatic cars don't really benefit from stiffer driveline mounts like the differential mounts etc. Couple of questions: 1. that view makes sense but are there any other opinions that differ (from experience perhaps?) , 2. is there anything else i should be looking at or having done when the differential and trans mounts are being cared for?

I'm comfortably at stage 1+ with all required and recommended mods and near 140k miles. Maybe at a push i'd go GTRS or broad equivalent eventually.

thanks