Blakeus,
I was waiting for your report, thanks. Sorry about the rebuild. My old speedo also squeaked and then failed completely. I already installed a new cable and gearing in the transmission, so I bought a used Ebay speedo ($100) that was advertised not to waver or squeak. It doesn't squeak (I think) but it jumps everywhere until about 50 mph and then settles down. Now if can find the right speedo gear as this "new" speedo reads about 10 mph low. At least it has approximately speeds above 50. Below 50 who cares. Also, my 91 LX is so noisy and my sounds system is so loud, the speedo squeaks disappear.
Next step along the path--an aftermarket mechanical speedo which requires calibration; and then a GPS speedo ?
Nah, I'll just stick with my Iphone speedo ap.
George
91 LX with the usual stuff--headers, clutch, driveshaft,
K&N air, etc.