My speedometer stopped working not long after I bought my 75 comvertible about a year ago. I took it in to a mechanic, he fed me some line about a bushing being worn out, but got it working again. From talking to a local parts guy, I suspect my mechanic just squirted some glue on the end of the speedo cable at the transmission to get it to keep from slipping. The problem is back -- speedometer not working -- so I took it in to my local vette shop. The guy there says it's the coupling between the speedo cable and the (4 spd) trans. That part makes a 90 degree turn between the speedometer cable and the transmission. I've tried locating the part through Eckler's and Paragon, but no luck. I suspect a 73-76 vette, monte carlo, chevelle, or nova with a 4 spd manual trans may have the same coupling, but I haven't been able to find one yet. Any ideas?