I could use a little insight here guys. I have a '54 SM420 tranny in my '52 3100. My speedo stopped working a couple of days ago. I unhooked the cable at the tranny and spun the inner cable and the speedo needle jumps as it should. I took the gear housing out of the side of the tranny. The gear only spins about halfway around and binds. It appears the shaft is bent. My first question is- What would cause the shaft to bend like that? I don't want to replace the gear only to have the same thing happen again. My next question is- Where can I find the gears for the SM420? Any help is greatly appreciated.
Last edited by SmallBlockHead; 09/02/2014 12:34 AM.
