I know this is an old post but I need help. And this is pretty close to what I'm doing.
My speedo won't register. So I took out the sleeve and pinion and it looks like some of the teeth have been stripped, but only in one section. I though maybe a PO might have changed it and installed the wrong one. And looking at some of the other posts. We're talk of the sleeve and the offset of the gear being different so I grinder a notch for the lock down key and turned the sleeve 180.
But when I put it back in I still wasn't getting anything. The speedo cable won't turn or anything. So now my question is what is the correct way to install the sleeve. The reason I quoted this is because I have the 3 speed auto in my 76 620.