NO the trans needs to be out. BTW that gasket requires fairly in depth disassembly to replace. I would leave it alone until it leaks enought to be a real problem. IMHO
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.