I have something that looks similar only smaller in the rear case near the back of the transaxle. It is right at the bottom in one of the deep little bolt channels. Is there something back there that might let go and bounce around?
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.