Speedometer problem

[ox_ford_guy]

Help...I was recently driving my cobra and the speedometer jumped wildly and then just quit. (It is a Autometer reverse reading unit) The trans is a Tremec T-5

I thought it might be the cable so I removed the old one and replaced it with a new assembly.
Although I am not totally sure how the speedo drive gear on the transmission end should look, I removed the clip and inspected the gear teeth and the square cable drive hole inside and it looked OK. I could see no evidence of damaged gear particles or anything else.

This speedo gear has the drive gear tooth configuation and a pointed round end shaft (on the far end away from the retaining clip) that is all part of the gear. The pointed end goes back into the trans first when reinstalling the cable assembly.

I re-installed the new cable with the original gear and clip as I had taken it out and the speedo still doesn't work.

If I undo the cable at the speedo end and turn the inside drive cable by hand it turns freely in the transmission with no notable resistance. (I would think it should be locked if engaged and working properly) It also does not turn on the speedometer end when driving.

Any ideas on where to look next or who can help would be greatly appreciated ...Thanks