I would remove the bottom cover and look at the pinion gear for any pitting or holes,you can't see anything else with out splitting the case. The ZF turns the right way to use with a Chevy if you use it Pantera way up, but if you flip it up side down you will have five reverse gears unless you flip the ring gear. Lloyd @ RBT
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.