[ox_ford_guy]

Rallysnake/Jarendall/Xlr8or..Thanks for you replies.

I guess a wrong cable gear is possible as I did not install the trans. The previous owner did.

I went to johnsmustang web site and looked at the T-5 speedo gears and the one that is in the trans now is black and looks more like the ones pictured for automatic trans. (The non gear end looks longer than that on the T-5 gears)
I am going to contact Tremec to try to get info on the year of my trans core
so I can try a different speedo cable gear)

However, the configuration that is in there now did work for several hundred miles before something failed. Would this be possible if it is the improper cable gear match?

Also, if the problem is a stripped drive/driven gear in the tranny is it at all fixable without a total tranny removal...

Thanks again to all for the guidance as I am new to the Cobra world....ox_ford_guy